diff --git a/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx b/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx
index 17894197e..1b864a7c0 100644
--- a/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx
+++ b/apps/as/app/(main)/(with-base-layout)/sewer-bsc-plan/[id]/page.tsx
@@ -1,17 +1,13 @@
-import Link from "next/link";
+import { SewerBscPlanViewPage } from "@/pages/sewer-bsc-plan";
 
 interface PageProps {
   params: Promise<{ id: string }>;
+  searchParams: Promise<{ chgCycl?: string }>;
 }
 
-export default async function Page({ params }: PageProps) {
+export default async function Page({ params, searchParams }: PageProps) {
   const { id } = await params;
-  return (
-    <div className="mt-6 px-4 text-[1.4rem]">
-      하수도기본계획 상세({id})는 후속 구현 예정입니다.{" "}
-      <Link className="underline" href={`/sewer-bsc-plan/${id}/edit`}>
-        수정 화면으로 이동
-      </Link>
-    </div>
-  );
+  const { chgCycl } = await searchParams;
+  const propChgCycl = chgCycl ? Number(chgCycl) : undefined;
+  return <SewerBscPlanViewPage id={id} propChgCycl={propChgCycl} />;
 }
diff --git a/apps/as/src/entities/elapr/model/elapr-prgrs-stts-interface.ts b/apps/as/src/entities/elapr/model/elapr-prgrs-stts-interface.ts
index 7c24ff8eb..61d0f2cdf 100644
--- a/apps/as/src/entities/elapr/model/elapr-prgrs-stts-interface.ts
+++ b/apps/as/src/entities/elapr/model/elapr-prgrs-stts-interface.ts
@@ -51,7 +51,6 @@ export interface ElaprPrgrsSttsMyDocSearchParams extends ElaprPrgrsSttsSearchDto
 export interface ElaprProcessRequestDto {
   atrzPrgrsSttsComCd: string;
   rjctRsn?: string;
-  finalApprovalYn?: boolean;
 }
 
 /** 백엔드 ElaprApproverChangeRequestDto */
diff --git a/apps/as/src/entities/sewer-bsc-plan/api/queries.ts b/apps/as/src/entities/sewer-bsc-plan/api/queries.ts
index 063e1bd00..a4488a3ed 100644
--- a/apps/as/src/entities/sewer-bsc-plan/api/queries.ts
+++ b/apps/as/src/entities/sewer-bsc-plan/api/queries.ts
@@ -5,6 +5,8 @@ import { ENDPOINT } from "@/shared/config";
 import type {
   SewerBscPlanApplySaveRequestDto,
   SewerBscPlanSaveRequestDto,
+} from "../model/sewer-bsc-plan-apply-payload-schema";
+import type {
   SewerBscPlanSearchRequestDto,
   SewerBscPlanUpdateRequestDto,
 } from "../model/sewer-bsc-plan-interface";
diff --git a/apps/as/src/entities/sewer-bsc-plan/api/sewer-bsc-plan-service.ts b/apps/as/src/entities/sewer-bsc-plan/api/sewer-bsc-plan-service.ts
index 013b1d384..62aced93b 100644
--- a/apps/as/src/entities/sewer-bsc-plan/api/sewer-bsc-plan-service.ts
+++ b/apps/as/src/entities/sewer-bsc-plan/api/sewer-bsc-plan-service.ts
@@ -4,10 +4,12 @@ import type { PageResponse } from "@/shared/model";
 
 import type {
   SewerBscPlanApplySaveRequestDto,
+  SewerBscPlanSaveRequestDto,
+} from "../model/sewer-bsc-plan-apply-payload-schema";
+import type {
   SewerBscPlanApplySaveResponseDto,
   SewerBscPlanDetResponseDto,
   SewerBscPlanResponseDto,
-  SewerBscPlanSaveRequestDto,
   SewerBscPlanSearchRequestDto,
   SewerBscPlanService,
   SewerBscPlanUpdateRequestDto,
@@ -75,8 +77,11 @@ async function submitReqSupplement(
   id: string,
   chgCycl: number,
   body: SewerBscPlanApplySaveRequestDto,
-): Promise<string> {
-  const response = await client.post<string>(`${BASE}/${id}/${chgCycl}/reqsupplement`, body);
+): Promise<SewerBscPlanApplySaveResponseDto> {
+  const response = await client.post<SewerBscPlanApplySaveResponseDto>(
+    `${BASE}/${id}/${chgCycl}/reqsupplement`,
+    body,
+  );
   return response.data;
 }
 
diff --git a/apps/as/src/entities/sewer-bsc-plan/index.ts b/apps/as/src/entities/sewer-bsc-plan/index.ts
index eecf354cd..8d560a60c 100644
--- a/apps/as/src/entities/sewer-bsc-plan/index.ts
+++ b/apps/as/src/entities/sewer-bsc-plan/index.ts
@@ -13,35 +13,52 @@ export {
 } from "./api/queries";
 export { sewerBscPlanService } from "./api/sewer-bsc-plan-service";
 export type {
-  AtflMngClientResponseDto,
   CklstResultItem,
-  CklstRvwRsltTreeDto,
   EsntlAtchFileItem,
-  EsntlAtchFileMngTreeResponseDto,
   SewerBscPlanApplySaveRequestDto,
-  SewerBscPlanApplySaveResponseDto,
   SewerBscPlanBizCstItem,
+  SewerBscPlanDtlSaveRequestDto,
+  SewerBscPlanFnrsCstItem,
+  SewerBscPlanOtlnItem,
+  SewerBscPlanRvwOpnnItem,
+  SewerBscPlanSaveRequestDto,
+  SewerBscPlanSplmntDmndItem,
+  SewerBscPlanTmplntDtlItem,
+  SewerBscPlanTmplntItem,
+  SewerBscPlanTmplntTmprStrgItem,
+} from "./model/sewer-bsc-plan-apply-payload-schema";
+export {
+  sewerBscPlanApplySaveSchema,
+  sewerBscPlanBizCstItemSchema,
+  sewerBscPlanCklstResultItemSchema,
+  sewerBscPlanDtlSaveSchema,
+  sewerBscPlanEsntlAtchFileItemSchema,
+  sewerBscPlanFnrsCstItemSchema,
+  sewerBscPlanOtlnItemSchema,
+  sewerBscPlanRvwOpnnItemSchema,
+  sewerBscPlanSaveSchema,
+  sewerBscPlanSplmntDmndItemSchema,
+  sewerBscPlanTmplntDtlItemSchema,
+  sewerBscPlanTmplntItemSchema,
+  sewerBscPlanTmplntTmprStrgItemSchema,
+} from "./model/sewer-bsc-plan-apply-payload-schema";
+export type {
+  AtflMngClientResponseDto,
+  CklstRvwRsltTreeDto,
+  EsntlAtchFileMngTreeResponseDto,
+  SewerBscPlanApplySaveResponseDto,
   SewerBscPlanBizCstResponseDto,
   SewerBscPlanDetResponseDto,
   SewerBscPlanDtlResponseDto,
-  SewerBscPlanDtlSaveRequestDto,
-  SewerBscPlanFnrsCstItem,
   SewerBscPlanFnrsCstResponseDto,
-  SewerBscPlanOtlnItem,
   SewerBscPlanOtlnResponseDto,
   SewerBscPlanResponseDto,
-  SewerBscPlanRvwOpnnItem,
   SewerBscPlanRvwOpnnResponseDto,
-  SewerBscPlanSaveRequestDto,
   SewerBscPlanSearchRequestDto,
   SewerBscPlanService,
-  SewerBscPlanSplmntDmndItem,
   SewerBscPlanSplmntDmndResponseDto,
-  SewerBscPlanTmplntDtlItem,
   SewerBscPlanTmplntDtlResponseDto,
-  SewerBscPlanTmplntItem,
   SewerBscPlanTmplntResponseDto,
-  SewerBscPlanTmplntTmprStrgItem,
   SewerBscPlanTmplntTmprStrgResponseDto,
   SewerBscPlanUpdateRequestDto,
 } from "./model/sewer-bsc-plan-interface";
diff --git a/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-apply-payload-schema.ts b/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-apply-payload-schema.ts
new file mode 100644
index 000000000..0060467b7
--- /dev/null
+++ b/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-apply-payload-schema.ts
@@ -0,0 +1,173 @@
+import { z } from "zod";
+
+/** 백엔드 SewerBscPlanSaveRequestDto */
+export const sewerBscPlanSaveSchema = z.object({
+  sewerBscPlanDocNo: z.string().optional(),
+  admdstCd: z.string().optional(),
+  envoSeComCd: z.string().optional(),
+  sewerBscPlanSeComCd: z.string().optional(),
+  sewerBscPlanNm: z.string().optional(),
+  taskSeComCd: z.string().optional(),
+  prgrsSttsComCd: z.string().optional(),
+});
+
+/** 백엔드 SewerBscPlanDtlSaveRequestDto */
+export const sewerBscPlanDtlSaveSchema = z.object({
+  sewerBscPlanDocNo: z.string().optional(),
+  chgCycl: z.number().optional(),
+  aplcntNm: z.string().optional(),
+  aplcntMblTelno: z.string().optional(),
+  aplcntOgdpNm: z.string().optional(),
+  aplcntEmlAddr: z.string().optional(),
+  dsgnrNm: z.string().optional(),
+  dsgnrTelno: z.string().optional(),
+  dsgnrOgdpNm: z.string().optional(),
+  dsgnrEmlAddr: z.string().optional(),
+  planYr: z.string().optional(),
+  crtrYr: z.string().optional(),
+  bizOtlnCn: z.string().optional(),
+  frlvlGoalYr: z.string().optional(),
+  sclvlGoalYr: z.string().optional(),
+  thlvlGoalYr: z.string().optional(),
+  folvlGoalYr: z.string().optional(),
+  atchFileGroupId: z.string().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanOtlnItem */
+export const sewerBscPlanOtlnItemSchema = z.object({
+  planStpNo: z.number().optional(),
+  sewerPlanPpltnCnt: z.number().optional(),
+  sewerPrcsPpltnCnt: z.number().optional(),
+  sewerPsplyRt: z.number().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.CklstResultItem */
+export const sewerBscPlanCklstResultItemSchema = z.object({
+  cklstRvwSn: z.number().optional(),
+  cklstArtclSn: z.number().optional(),
+  cklstSn: z.number().optional(),
+  rvwStpComCd: z.string(),
+  selected: z.string().optional(),
+  picRvwCn: z.string().nullish(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanFnrsCstItem */
+export const sewerBscPlanFnrsCstItemSchema = z.object({
+  planStpNo: z.number().optional(),
+  gvexpAmt: z.number().optional(),
+  lcexpAmt: z.number().optional(),
+  orgprBdchgAmt: z.number().optional(),
+  etcAmt: z.number().optional(),
+  sumAmt: z.number().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanSplmntDmndItem */
+export const sewerBscPlanSplmntDmndItemSchema = z.object({
+  splmntDmndSn: z.number().nullish(),
+  splmntArtclComCd: z.string().optional(),
+  splmntDmndCn: z.string().optional(),
+  splmntDmndDt: z.string().optional(),
+  splmntDmndAtchFileGroupId: z.string().optional(),
+  splmntCn: z.string().optional(),
+  splmntPicNm: z.string().optional(),
+  splmntCmptnDt: z.string().optional(),
+  splmntAtchFileGroupId: z.string().optional(),
+  cmptnYn: z.string().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanRvwOpnnItem */
+export const sewerBscPlanRvwOpnnItemSchema = z.object({
+  rvwOpnnSn: z.number().optional(),
+  opnrSeComCd: z.string().optional(),
+  opnrNm: z.string().optional(),
+  rvwRsltCn: z.string().optional(),
+  rvwRsltAnmlyYn: z.string().optional(),
+  atchFileGroupId: z.string().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.EsntlAtchFileItem */
+export const sewerBscPlanEsntlAtchFileItemSchema = z.object({
+  esntlAtchFileId: z.string().optional(),
+  atchFileGroupId: z.string().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanBizCstItem */
+export const sewerBscPlanBizCstItemSchema = z.object({
+  planStpNo: z.number().optional(),
+  acntgSeCd: z.string().optional(),
+  cstrnAmt: z.number().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanTmplntDtlItem */
+export const sewerBscPlanTmplntDtlItemSchema = z.object({
+  planStpNo: z.number().optional(),
+  swtrmtFcltCd: z.string().optional(),
+  prcsZoneArea: z.number().optional(),
+  swtrmtPpltnCnt: z.number().optional(),
+  planSwqty: z.number().optional(),
+  fcltCpct: z.number().optional(),
+  sprsysDrtwPplLen: z.number().optional(),
+  sprsysExlnPplLen: z.number().optional(),
+  cbsysPplLen: z.number().optional(),
+  icptgPplLen: z.number().optional(),
+  drgCnt: z.number().optional(),
+  drtwRlyPumpCnt: z.number().optional(),
+  drtwPumpCnt: z.number().optional(),
+  exlnPumpCnt: z.number().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanTmplntItem */
+export const sewerBscPlanTmplntItemSchema = z.object({
+  swtrmtFcltCd: z.string().optional(),
+  atchFileGroupId: z.string().optional(),
+  sewerBscPlanTmplntDtlList: z.array(sewerBscPlanTmplntDtlItemSchema).optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanTmplntTmprStrgItem */
+export const sewerBscPlanTmplntTmprStrgItemSchema = z.object({
+  dtStrgDt: z.string().optional(),
+  swtrmtFcltCd: z.string().optional(),
+  prcsZoneArea: z.number().optional(),
+  swtrmtPpltnCnt: z.number().optional(),
+  planSwqty: z.number().optional(),
+  fcltCpct: z.number().optional(),
+  sprsysDrtwPplLen: z.number().optional(),
+  sprsysExlnPplLen: z.number().optional(),
+  cbsysPplLen: z.number().optional(),
+  icptgPplLen: z.number().optional(),
+  drgCnt: z.number().optional(),
+  drtwRlyPumpCnt: z.number().optional(),
+  drtwPumpCnt: z.number().optional(),
+  exlnPumpCnt: z.number().optional(),
+});
+
+/** 백엔드 SewerBscPlanApplySaveRequestDto */
+export const sewerBscPlanApplySaveSchema = z.object({
+  techReViewSaveCd: z.string().optional(),
+  rvwStpCd: z.string().optional(),
+  sewerBscPlan: sewerBscPlanSaveSchema,
+  sewerBscPlanDtl: sewerBscPlanDtlSaveSchema,
+  sewerBscPlanOtlnList: z.array(sewerBscPlanOtlnItemSchema).optional(),
+  cklstResultList: z.array(sewerBscPlanCklstResultItemSchema).optional(),
+  fnrsCstList: z.array(sewerBscPlanFnrsCstItemSchema).optional(),
+  splmntDmndList: z.array(sewerBscPlanSplmntDmndItemSchema).optional(),
+  rvwOpnnList: z.array(sewerBscPlanRvwOpnnItemSchema).optional(),
+  esntlAtchFileList: z.array(sewerBscPlanEsntlAtchFileItemSchema).optional(),
+  bizCstList: z.array(sewerBscPlanBizCstItemSchema).optional(),
+  sewerBscPlanTmplntList: z.array(sewerBscPlanTmplntItemSchema).optional(),
+  tmplntTmprStrgList: z.array(sewerBscPlanTmplntTmprStrgItemSchema).optional(),
+});
+
+export type SewerBscPlanSaveRequestDto = z.infer<typeof sewerBscPlanSaveSchema>;
+export type SewerBscPlanDtlSaveRequestDto = z.infer<typeof sewerBscPlanDtlSaveSchema>;
+export type SewerBscPlanOtlnItem = z.infer<typeof sewerBscPlanOtlnItemSchema>;
+export type CklstResultItem = z.infer<typeof sewerBscPlanCklstResultItemSchema>;
+export type SewerBscPlanFnrsCstItem = z.infer<typeof sewerBscPlanFnrsCstItemSchema>;
+export type SewerBscPlanSplmntDmndItem = z.infer<typeof sewerBscPlanSplmntDmndItemSchema>;
+export type SewerBscPlanRvwOpnnItem = z.infer<typeof sewerBscPlanRvwOpnnItemSchema>;
+export type EsntlAtchFileItem = z.infer<typeof sewerBscPlanEsntlAtchFileItemSchema>;
+export type SewerBscPlanBizCstItem = z.infer<typeof sewerBscPlanBizCstItemSchema>;
+export type SewerBscPlanTmplntDtlItem = z.infer<typeof sewerBscPlanTmplntDtlItemSchema>;
+export type SewerBscPlanTmplntItem = z.infer<typeof sewerBscPlanTmplntItemSchema>;
+export type SewerBscPlanTmplntTmprStrgItem = z.infer<typeof sewerBscPlanTmplntTmprStrgItemSchema>;
+export type SewerBscPlanApplySaveRequestDto = z.infer<typeof sewerBscPlanApplySaveSchema>;
diff --git a/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-interface.ts b/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-interface.ts
index cc5f533d8..0e8025278 100644
--- a/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-interface.ts
+++ b/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-interface.ts
@@ -1,35 +1,26 @@
 import type {
   AtflMngClientResponseDto,
-  CklstResultSaveBase,
   CklstRvwRsltTreeDto,
   EsntlAtchFileMngTreeResponseDto,
-  EsntlAtchFileSaveBase,
   PageableParams,
   PageResponse,
-  PbadmsApplySaveHeader,
   RvwOpnnResponseExtension,
   RvwOpnnSaveBase,
   SplmntDmndResponseExtension,
   SplmntDmndSaveBase,
 } from "@/shared/model";
 
+import type {
+  SewerBscPlanApplySaveRequestDto,
+  SewerBscPlanSaveRequestDto,
+} from "./sewer-bsc-plan-apply-payload-schema";
+
 export type {
   AtflMngClientResponseDto,
   CklstRvwRsltTreeDto,
   EsntlAtchFileMngTreeResponseDto,
 } from "@/shared/model";
 
-/** 백엔드 SewerBscPlanSaveRequestDto */
-export interface SewerBscPlanSaveRequestDto {
-  sewerBscPlanDocNo?: string;
-  admdstCd?: string;
-  envoSeComCd?: string;
-  sewerBscPlanSeComCd?: string;
-  sewerBscPlanNm?: string;
-  taskSeComCd?: string;
-  prgrsSttsComCd?: string;
-}
-
 /** 백엔드 SewerBscPlanUpdateRequestDto */
 export interface SewerBscPlanUpdateRequestDto {
   admdstCd?: string;
@@ -72,28 +63,6 @@ export interface SewerBscPlanResponseDto {
   mdfcnDt?: string;
 }
 
-/** 백엔드 SewerBscPlanDtlSaveRequestDto */
-export interface SewerBscPlanDtlSaveRequestDto {
-  sewerBscPlanDocNo?: string;
-  chgCycl?: number;
-  aplcntNm?: string;
-  aplcntMblTelno?: string;
-  aplcntOgdpNm?: string;
-  aplcntEmlAddr?: string;
-  dsgnrNm?: string;
-  dsgnrTelno?: string;
-  dsgnrOgdpNm?: string;
-  dsgnrEmlAddr?: string;
-  planYr?: string;
-  crtrYr?: string;
-  bizOtlnCn?: string;
-  frlvlGoalYr?: string;
-  sclvlGoalYr?: string;
-  thlvlGoalYr?: string;
-  folvlGoalYr?: string;
-  atchFileGroupId?: string;
-}
-
 /** 백엔드 SewerBscPlanDtlResponseDto */
 export interface SewerBscPlanDtlResponseDto {
   sewerBscPlanDocNo?: string;
@@ -210,103 +179,6 @@ export interface SewerBscPlanTmplntTmprStrgResponseDto {
   exlnPumpCnt?: number;
 }
 
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanOtlnItem */
-export interface SewerBscPlanOtlnItem {
-  planStpNo?: number;
-  sewerPlanPpltnCnt?: number;
-  sewerPrcsPpltnCnt?: number;
-  sewerPsplyRt?: number;
-}
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.CklstResultItem */
-export interface CklstResultItem extends CklstResultSaveBase {
-  selected?: string;
-}
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanFnrsCstItem */
-export interface SewerBscPlanFnrsCstItem {
-  planStpNo?: number;
-  gvexpAmt?: number;
-  lcexpAmt?: number;
-  orgprBdchgAmt?: number;
-  etcAmt?: number;
-  sumAmt?: number;
-}
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanSplmntDmndItem */
-export type SewerBscPlanSplmntDmndItem = SplmntDmndSaveBase;
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanRvwOpnnItem */
-export type SewerBscPlanRvwOpnnItem = RvwOpnnSaveBase;
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.EsntlAtchFileItem */
-export type EsntlAtchFileItem = EsntlAtchFileSaveBase;
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanBizCstItem */
-export interface SewerBscPlanBizCstItem {
-  planStpNo?: number;
-  acntgSeCd?: string;
-  cstrnAmt?: number;
-}
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanTmplntDtlItem */
-export interface SewerBscPlanTmplntDtlItem {
-  planStpNo?: number;
-  swtrmtFcltCd?: string;
-  prcsZoneArea?: number;
-  swtrmtPpltnCnt?: number;
-  planSwqty?: number;
-  fcltCpct?: number;
-  sprsysDrtwPplLen?: number;
-  sprsysExlnPplLen?: number;
-  cbsysPplLen?: number;
-  icptgPplLen?: number;
-  drgCnt?: number;
-  drtwRlyPumpCnt?: number;
-  drtwPumpCnt?: number;
-  exlnPumpCnt?: number;
-}
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanTmplntItem */
-export interface SewerBscPlanTmplntItem {
-  swtrmtFcltCd?: string;
-  atchFileGroupId?: string;
-  sewerBscPlanTmplntDtlList?: SewerBscPlanTmplntDtlItem[];
-}
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto.SewerBscPlanTmplntTmprStrgItem */
-export interface SewerBscPlanTmplntTmprStrgItem {
-  dtStrgDt?: string;
-  swtrmtFcltCd?: string;
-  prcsZoneArea?: number;
-  swtrmtPpltnCnt?: number;
-  planSwqty?: number;
-  fcltCpct?: number;
-  sprsysDrtwPplLen?: number;
-  sprsysExlnPplLen?: number;
-  cbsysPplLen?: number;
-  icptgPplLen?: number;
-  drgCnt?: number;
-  drtwRlyPumpCnt?: number;
-  drtwPumpCnt?: number;
-  exlnPumpCnt?: number;
-}
-
-/** 백엔드 SewerBscPlanApplySaveRequestDto */
-export interface SewerBscPlanApplySaveRequestDto extends PbadmsApplySaveHeader {
-  sewerBscPlan: SewerBscPlanSaveRequestDto;
-  sewerBscPlanDtl: SewerBscPlanDtlSaveRequestDto;
-  sewerBscPlanOtlnList?: SewerBscPlanOtlnItem[];
-  cklstResultList?: CklstResultItem[];
-  fnrsCstList?: SewerBscPlanFnrsCstItem[];
-  splmntDmndList?: SewerBscPlanSplmntDmndItem[];
-  rvwOpnnList?: SewerBscPlanRvwOpnnItem[];
-  esntlAtchFileList?: EsntlAtchFileItem[];
-  bizCstList?: SewerBscPlanBizCstItem[];
-  sewerBscPlanTmplntList?: SewerBscPlanTmplntItem[];
-  tmplntTmprStrgList?: SewerBscPlanTmplntTmprStrgItem[];
-}
-
 /** 백엔드 SewerBscPlanApplySaveResponseDto */
 export interface SewerBscPlanApplySaveResponseDto {
   sewerBscPlanDocNo: string;
@@ -346,6 +218,6 @@ export interface SewerBscPlanService {
     id: string,
     chgCycl: number,
     body: SewerBscPlanApplySaveRequestDto,
-  ): Promise<string>;
+  ): Promise<SewerBscPlanApplySaveResponseDto>;
   techReview(id: string, body: SewerBscPlanApplySaveRequestDto): Promise<void>;
 }
diff --git a/apps/as/src/pages/design-cnstn/ui/design-form-page.tsx b/apps/as/src/pages/design-cnstn/ui/design-form-page.tsx
index 63d4eda75..b9bc230d9 100644
--- a/apps/as/src/pages/design-cnstn/ui/design-form-page.tsx
+++ b/apps/as/src/pages/design-cnstn/ui/design-form-page.tsx
@@ -15,10 +15,12 @@ import {
   type DesignCnstnMngDetResponseDto,
   designCnstnMngService,
 } from "@/entities/design-cnstn";
+import { useEsntlAtchFileMngTree } from "@/entities/esntl";
 import {
   AttachmentsFormSection,
   BusinessScaleFormSection,
   ContactInfoFormSection,
+  isFormEsntlAtchComplete,
   PrivacyConsentSection,
 } from "@/widgets/pbadms-sprt";
 import { Button } from "@common/components";
@@ -53,6 +55,8 @@ function DesignFormPage({ id, mode, initialData, createDefaults }: DesignFormPag
   const [isSubmitting, setIsSubmitting] = useState(false);
   const isEditMode = mode === "edit";
 
+  const { data: essentialFiles = [] } = useEsntlAtchFileMngTree({ docSeComCd: "CNFM" });
+
   const form = useForm<DesignCnstnRegistFormData>({
     resolver: zodResolver(designCnstnRegistSchema),
     mode: "onChange",
@@ -113,6 +117,11 @@ function DesignFormPage({ id, mode, initialData, createDefaults }: DesignFormPag
   async function onApply(data: DesignCnstnRegistFormData) {
     if (isSubmitting) return;
 
+    if (!isFormEsntlAtchComplete(essentialFiles, data.esntlAtchFileList)) {
+      alert("필수 첨부파일을 모두 등록해야 신청이 가능합니다.");
+      return;
+    }
+
     try {
       setIsSubmitting(true);
       const designCnstnDocNo = await submitForm(data, "CT");
diff --git a/apps/as/src/pages/design-cnstn/ui/sections/attachments-section.tsx b/apps/as/src/pages/design-cnstn/ui/sections/attachments-section.tsx
index 082881231..d176631be 100644
--- a/apps/as/src/pages/design-cnstn/ui/sections/attachments-section.tsx
+++ b/apps/as/src/pages/design-cnstn/ui/sections/attachments-section.tsx
@@ -62,49 +62,51 @@ function AttachmentsSection({ esntlFileList, etcFileList }: AttachmentsSectionPr
         </SectionCollapsible>
       )}
 
-      <SectionCollapsible title="기타 첨부파일">
-        <div className="overflow-x-auto">
-          <Table variant="secondary">
-            <TableHeader>
-              <TableRow>
-                <TableHead>파일명</TableHead>
-                <TableHead className="w-[8rem] text-right">크기</TableHead>
-              </TableRow>
-            </TableHeader>
-            <TableBody>
-              {etcFileList.length === 0 ? (
+      {etcFileList.length > 0 && (
+        <SectionCollapsible title="기타 첨부파일">
+          <div className="overflow-x-auto">
+            <Table variant="secondary">
+              <TableHeader>
                 <TableRow>
-                  <TableCell colSpan={2} className="py-12 text-center text-muted-foreground">
-                    등록된 기타첨부파일이 없습니다.
-                  </TableCell>
+                  <TableHead>파일명</TableHead>
+                  <TableHead className="w-[8rem] text-right">크기</TableHead>
                 </TableRow>
-              ) : (
-                etcFileList.map((file) => (
-                  <TableRow key={file.atflId}>
-                    <TableCell className="text-left">
-                      {file.atflCd ? (
-                        <a
-                          className="cursor-pointer text-blue-600 hover:underline"
-                          onClick={() => downloadAttachment(file.atflCd)}
-                          target="_blank"
-                          rel="noreferrer"
-                        >
-                          {file.orgnlFileNm || file.physFileNm || file.atflId}
-                        </a>
-                      ) : (
-                        <span>{file.orgnlFileNm || file.physFileNm || file.atflId}</span>
-                      )}
-                    </TableCell>
-                    <TableCell className="text-right text-gray-500">
-                      {formatFileSize(file.atflFlieSz)}
+              </TableHeader>
+              <TableBody>
+                {etcFileList.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={2} className="py-12 text-center text-muted-foreground">
+                      등록된 기타첨부파일이 없습니다.
                     </TableCell>
                   </TableRow>
-                ))
-              )}
-            </TableBody>
-          </Table>
-        </div>
-      </SectionCollapsible>
+                ) : (
+                  etcFileList.map((file) => (
+                    <TableRow key={file.atflId}>
+                      <TableCell className="text-left">
+                        {file.atflCd ? (
+                          <a
+                            className="cursor-pointer text-blue-600 hover:underline"
+                            onClick={() => downloadAttachment(file.atflCd)}
+                            target="_blank"
+                            rel="noreferrer"
+                          >
+                            {file.orgnlFileNm || file.physFileNm || file.atflId}
+                          </a>
+                        ) : (
+                          <span>{file.orgnlFileNm || file.physFileNm || file.atflId}</span>
+                        )}
+                      </TableCell>
+                      <TableCell className="text-right text-gray-500">
+                        {formatFileSize(file.atflFlieSz)}
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </div>
+        </SectionCollapsible>
+      )}
     </>
   );
 }
diff --git a/apps/as/src/pages/design-cnstn/ui/sections/tech-review-opinion-section.tsx b/apps/as/src/pages/design-cnstn/ui/sections/tech-review-opinion-section.tsx
index 9c6985ffb..773110fca 100644
--- a/apps/as/src/pages/design-cnstn/ui/sections/tech-review-opinion-section.tsx
+++ b/apps/as/src/pages/design-cnstn/ui/sections/tech-review-opinion-section.tsx
@@ -2,8 +2,11 @@
 
 import { forwardRef, useEffect, useImperativeHandle, useState } from "react";
 
+import { Paperclip } from "lucide-react";
+
 import { PROXY_HOST } from "@/shared/config";
 import { dayjs, getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
 import { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
 import { attachService } from "@/entities/attach";
 import type { DesignCnstnRvwOpnnResponseDto } from "@/entities/design-cnstn";
@@ -71,12 +74,10 @@ function hasFormContent(formData: ReviewOpinionFormData) {
 const TechReviewOpinionSection = forwardRef<
   TechReviewOpinionSectionHandle,
   TechReviewOpinionSectionProps
->(function TechReviewOpinionSection({
-  rvwList,
-  editableReviewStep,
-  atrzSeComCdList = [],
-  isAtrzLoading = false,
-}, ref) {
+>(function TechReviewOpinionSection(
+  { rvwList, editableReviewStep, atrzSeComCdList = [], isAtrzLoading = false },
+  ref,
+) {
   const canWriteOpinion = !isAtrzLoading && atrzSeComCdList.includes("ATRZ02");
   const [formData, setFormData] = useState<ReviewOpinionFormData>({
     ...EMPTY_FORM_DATA,
@@ -240,7 +241,9 @@ const TechReviewOpinionSection = forwardRef<
               <TableCell>
                 {uploadedFile ? (
                   <div className="flex items-center gap-2">
-                    <span className="text-xl">{uploadedFile.fileName}</span>
+                    <TextShimmer className="text-xl" active={uploading}>
+                      {uploadedFile.fileName}
+                    </TextShimmer>
                     <Button
                       size="icon"
                       onClick={(e) => {
@@ -317,11 +320,12 @@ function TechReviewOpinionTable({ items }: TechReviewOpinionTableProps) {
               <TableCell align="center">
                 {item.atchFileInfo?.atflCd ? (
                   <a
-                    className="text-blue-600 hover:underline"
+                    className="inline-flex cursor-pointer items-start gap-1 text-left text-blue-600 hover:underline"
                     href={`${PROXY_HOST}/attach-service/api/v1/atflcd/download/${item.atchFileInfo.atflCd}`}
                     target="_blank"
                     rel="noreferrer"
                   >
+                    <Paperclip className="my-1 size-5 shrink-0" />
                     {item.atchFileInfo.orgnlFileNm || "다운로드"}
                   </a>
                 ) : (
diff --git a/apps/as/src/pages/fnrs-cnsltn/lib/fnrs-cnsltn-regist-schema.ts b/apps/as/src/pages/fnrs-cnsltn/lib/fnrs-cnsltn-regist-schema.ts
index 8bfc0c317..e925ab321 100644
--- a/apps/as/src/pages/fnrs-cnsltn/lib/fnrs-cnsltn-regist-schema.ts
+++ b/apps/as/src/pages/fnrs-cnsltn/lib/fnrs-cnsltn-regist-schema.ts
@@ -85,7 +85,7 @@ export const fnrsCnsltnRegistSchema = z.object({
   ),
   splmntDmndList: z.array(
     z.object({
-      splmntDmndSn: z.number().optional(),
+      splmntDmndSn: z.number().nullish(),
       splmntArtclComCd: z.string().optional(),
       splmntArtclCdNm: z.string().nullish(),
       splmntDmndCn: z.string().optional(),
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/components/checklist-task-panel.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/components/checklist-task-panel.tsx
index 1e4d186e6..6b38af620 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/components/checklist-task-panel.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/components/checklist-task-panel.tsx
@@ -46,12 +46,7 @@ function ChecklistTaskPanel({
         .forEach((row) => {
           nextResults[buildChecklistRowKey(row, selectedReviewStep)] = value;
         });
-      return patchChecklistFormState(
-        prev,
-        { results: nextResults },
-        allRows,
-        selectedReviewStep,
-      );
+      return patchChecklistFormState(prev, { results: nextResults }, allRows, selectedReviewStep);
     });
   }
 
@@ -77,6 +72,7 @@ function ChecklistTaskPanel({
                 <Button
                   type="button"
                   size="sm"
+                  color="white"
                   disabled={!isStepEditable}
                   onClick={() => handleSelectAll("Y")}
                 >
@@ -87,9 +83,9 @@ function ChecklistTaskPanel({
                 <Button
                   type="button"
                   size="sm"
+                  color="gray"
                   disabled={!isStepEditable}
                   onClick={() => handleSelectAll("N")}
-                  className="!bg-destructive"
                 >
                   전체 아니오
                 </Button>
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
index b4461ab1b..d776aed53 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
@@ -498,6 +498,7 @@ function FloatingActionButtons({
       />
 
       <SplmntDmndDialog
+        splmntArtclUpCd="SPLMNTARTCL"
         open={activeDialog === "dmndSplmnt"}
         onOpenChange={() => setActiveDialog(null)}
         isSubmitting={isProcessing}
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-form-page.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-form-page.tsx
index e85efd562..5a4222553 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-form-page.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/fnrs-form-page.tsx
@@ -10,6 +10,7 @@ import { useQueryClient } from "@tanstack/react-query";
 
 import { useAlertStore, useUserStore } from "@/shared/lib";
 import { useAcntgSeMngTree } from "@/entities/acntg";
+import { useEsntlAtchFileMngTree } from "@/entities/esntl";
 import {
   type FnrsCnsltnApplySaveRequestDto,
   fnrsCnsltnMngBaseKey,
@@ -27,6 +28,7 @@ import {
   ContactInfoFormSection,
   FnrsSharFormSection,
   isFormChecklistComplete,
+  isFormEsntlAtchComplete,
   PrivacyConsentSection,
   recalculateFnrsSharTotals,
   SplmntDmndFormSection,
@@ -67,6 +69,7 @@ function FnrsFormPage({ id, mode, initialData, createDefaults }: FnrsFormPagePro
 
   const { data: masterSharTree = [] } = useFnrsSharSeMngTree();
   const { data: acntgTree = [] } = useAcntgSeMngTree();
+  const { data: essentialFiles = [] } = useEsntlAtchFileMngTree({ docSeComCd: "FNRS" });
   const sharTree =
     isEditMode && initialData?.fnrsSharList?.length ? initialData.fnrsSharList : masterSharTree;
   const sharItems = useMemo(() => buildFnrsSharItems(sharTree), [sharTree]);
@@ -210,6 +213,11 @@ function FnrsFormPage({ id, mode, initialData, createDefaults }: FnrsFormPagePro
       return;
     }
 
+    if (!isFormEsntlAtchComplete(essentialFiles, data.esntlAtchFileList)) {
+      alert("필수 첨부파일을 모두 등록해야 신청이 가능합니다.");
+      return;
+    }
+
     try {
       setIsSubmitting(true);
       const fnrsCnsltnDocNo = await submitForm(data, "ST");
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/sections/attachments-section.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/sections/attachments-section.tsx
index 3dbbdf1fd..0ac529c18 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/sections/attachments-section.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/sections/attachments-section.tsx
@@ -19,98 +19,104 @@ function AttachmentsSection({ esntlFileList, etcFileList }: AttachmentsSectionPr
 
   return (
     <>
-      <SectionCollapsible title="필수 첨부파일">
-        <div className="overflow-x-auto">
-          <Table variant="secondary">
-            <TableHeader>
-              <TableRow>
-                <TableHead>필수 자료명</TableHead>
-                <TableHead>파일명</TableHead>
-                <TableHead className="w-[8rem] text-right">크기</TableHead>
-              </TableRow>
-            </TableHeader>
-            <TableBody>
-              {esntlFileList.length === 0 ? (
+      {esntlFileList.length > 0 && (
+        <SectionCollapsible title="필수 첨부파일">
+          <div className="overflow-x-auto">
+            <Table variant="secondary">
+              <TableHeader>
                 <TableRow>
-                  <TableCell colSpan={3} className="py-12 text-center text-muted-foreground">
-                    조회된 필수 첨부파일 항목이 없습니다.
-                  </TableCell>
+                  <TableHead>필수 자료명</TableHead>
+                  <TableHead>파일명</TableHead>
+                  <TableHead className="w-[8rem] text-right">크기</TableHead>
                 </TableRow>
-              ) : (
-                esntlFileList.map((file) => (
-                  <TableRow key={file.esntlAtchFileId}>
-                    <TableCell className="pl-2 text-left">
-                      {file.esntlAtchFileNm}
-                      {file.esntlAtchYn === "Y" ? (
-                        <span className="ml-1 text-red-500">*</span>
-                      ) : null}
+              </TableHeader>
+              <TableBody>
+                {esntlFileList.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={3} className="py-12 text-center text-muted-foreground">
+                      조회된 필수 첨부파일 항목이 없습니다.
                     </TableCell>
-                    <TableCell className="text-left">
-                      {file.atflCd ? (
-                        <a
-                          className="cursor-pointer text-blue-600 hover:underline"
-                          onClick={() => downloadAttachment(file.atflCd ?? "")}
-                          target="_blank"
-                          rel="noreferrer"
-                        >
-                          {file.orgnlFileNm || "다운로드"}
-                        </a>
-                      ) : (
-                        <span className="text-gray-500">첨부없음</span>
-                      )}
-                    </TableCell>
-                    <TableCell className="text-right">{formatFileSize(file.atflFlieSz)}</TableCell>
                   </TableRow>
-                ))
-              )}
-            </TableBody>
-          </Table>
-        </div>
-      </SectionCollapsible>
+                ) : (
+                  esntlFileList.map((file) => (
+                    <TableRow key={file.esntlAtchFileId}>
+                      <TableCell className="pl-2 text-left">
+                        {file.esntlAtchFileNm}
+                        {file.esntlAtchYn === "Y" ? (
+                          <span className="ml-1 text-red-500">*</span>
+                        ) : null}
+                      </TableCell>
+                      <TableCell className="text-left">
+                        {file.atflCd ? (
+                          <a
+                            className="cursor-pointer text-blue-600 hover:underline"
+                            onClick={() => downloadAttachment(file.atflCd ?? "")}
+                            target="_blank"
+                            rel="noreferrer"
+                          >
+                            {file.orgnlFileNm || "다운로드"}
+                          </a>
+                        ) : (
+                          <span className="text-gray-500">첨부없음</span>
+                        )}
+                      </TableCell>
+                      <TableCell className="text-right">
+                        {formatFileSize(file.atflFlieSz)}
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </div>
+        </SectionCollapsible>
+      )}
 
-      <SectionCollapsible title="기타 첨부파일">
-        <div className="overflow-x-auto">
-          <Table variant="secondary">
-            <TableHeader>
-              <TableRow>
-                <TableHead>파일명</TableHead>
-                <TableHead className="w-[8rem] text-right">크기</TableHead>
-              </TableRow>
-            </TableHeader>
-            <TableBody>
-              {etcFileList.length === 0 ? (
+      {etcFileList.length > 0 && (
+        <SectionCollapsible title="기타 첨부파일">
+          <div className="overflow-x-auto">
+            <Table variant="secondary">
+              <TableHeader>
                 <TableRow>
-                  <TableCell colSpan={2} className="py-12 text-center text-muted-foreground">
-                    등록된 기타첨부파일이 없습니다.
-                  </TableCell>
+                  <TableHead>파일명</TableHead>
+                  <TableHead className="w-[8rem] text-right">크기</TableHead>
                 </TableRow>
-              ) : (
-                etcFileList.map((file) => (
-                  <TableRow key={file.atflId}>
-                    <TableCell className="text-left">
-                      {file.atflCd ? (
-                        <a
-                          className="cursor-pointer text-blue-600 hover:underline"
-                          onClick={() => downloadAttachment(file.atflCd)}
-                          target="_blank"
-                          rel="noreferrer"
-                        >
-                          {file.orgnlFileNm || file.physFileNm || file.atflId}
-                        </a>
-                      ) : (
-                        <span>{file.orgnlFileNm || file.physFileNm || file.atflId}</span>
-                      )}
-                    </TableCell>
-                    <TableCell className="text-right text-gray-500">
-                      {formatFileSize(file.atflFlieSz)}
+              </TableHeader>
+              <TableBody>
+                {etcFileList.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={2} className="py-12 text-center text-muted-foreground">
+                      등록된 기타첨부파일이 없습니다.
                     </TableCell>
                   </TableRow>
-                ))
-              )}
-            </TableBody>
-          </Table>
-        </div>
-      </SectionCollapsible>
+                ) : (
+                  etcFileList.map((file) => (
+                    <TableRow key={file.atflId}>
+                      <TableCell className="text-left">
+                        {file.atflCd ? (
+                          <a
+                            className="cursor-pointer text-blue-600 hover:underline"
+                            onClick={() => downloadAttachment(file.atflCd)}
+                            target="_blank"
+                            rel="noreferrer"
+                          >
+                            {file.orgnlFileNm || file.physFileNm || file.atflId}
+                          </a>
+                        ) : (
+                          <span>{file.orgnlFileNm || file.physFileNm || file.atflId}</span>
+                        )}
+                      </TableCell>
+                      <TableCell className="text-right text-gray-500">
+                        {formatFileSize(file.atflFlieSz)}
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </div>
+        </SectionCollapsible>
+      )}
     </>
   );
 }
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/sections/checklist-section.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/sections/checklist-section.tsx
index 80671876a..09aa48052 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/sections/checklist-section.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/sections/checklist-section.tsx
@@ -71,6 +71,10 @@ function ChecklistSection({
 
   const { total, completed, percent } = progress;
 
+  if (cklstResultList.length === 0) {
+    return null;
+  }
+
   return (
     <SectionCollapsible title="체크리스트">
       <div className="flex flex-col gap-4 p-2">
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/sections/tech-review-opinion-section.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/sections/tech-review-opinion-section.tsx
index bc7a51af6..f8d416af1 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/sections/tech-review-opinion-section.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/sections/tech-review-opinion-section.tsx
@@ -2,8 +2,11 @@
 
 import { forwardRef, useEffect, useImperativeHandle, useState } from "react";
 
+import { Paperclip } from "lucide-react";
+
 import { PROXY_HOST } from "@/shared/config";
 import { dayjs, getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
 import { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
 import { attachService } from "@/entities/attach";
 import type { FnrsCnsltnRvwOpnnResponseDto } from "@/entities/fnrs-cnsltn";
@@ -71,12 +74,10 @@ function hasFormContent(formData: ReviewOpinionFormData) {
 const TechReviewOpinionSection = forwardRef<
   TechReviewOpinionSectionHandle,
   TechReviewOpinionSectionProps
->(function TechReviewOpinionSection({
-  rvwList,
-  editableReviewStep,
-  atrzSeComCdList = [],
-  isAtrzLoading = false,
-}, ref) {
+>(function TechReviewOpinionSection(
+  { rvwList, editableReviewStep, atrzSeComCdList = [], isAtrzLoading = false },
+  ref,
+) {
   const canWriteKecoOpinion = !isAtrzLoading && atrzSeComCdList.includes("ATRZ02");
   const [formData, setFormData] = useState<ReviewOpinionFormData>({
     ...EMPTY_FORM_DATA,
@@ -247,7 +248,9 @@ const TechReviewOpinionSection = forwardRef<
               <TableCell>
                 {uploadedFile ? (
                   <div className="flex items-center gap-2">
-                    <span className="text-xl">{uploadedFile.fileName}</span>
+                    <TextShimmer className="text-xl" active={uploading}>
+                      {uploadedFile.fileName}
+                    </TextShimmer>
                     <Button
                       size="icon"
                       onClick={(e) => {
@@ -336,11 +339,12 @@ function TechReviewOpinionTable({ items }: TechReviewOpinionTableProps) {
               <TableCell align="center">
                 {item.atchFileInfo?.atflCd ? (
                   <a
-                    className="text-blue-600 hover:underline"
+                    className="inline-flex cursor-pointer items-start gap-1 text-left text-blue-600 hover:underline"
                     href={`${PROXY_HOST}/attach-service/api/v1/atflcd/download/${item.atchFileInfo.atflCd}`}
                     target="_blank"
                     rel="noreferrer"
                   >
+                    <Paperclip className="my-1 size-5 shrink-0" />
                     {item.atchFileInfo.orgnlFileNm || "다운로드"}
                   </a>
                 ) : (
diff --git a/apps/as/src/pages/instl-sncn/lib/instl-sncn-regist-schema.ts b/apps/as/src/pages/instl-sncn/lib/instl-sncn-regist-schema.ts
index 5cc52d296..7fe74a337 100644
--- a/apps/as/src/pages/instl-sncn/lib/instl-sncn-regist-schema.ts
+++ b/apps/as/src/pages/instl-sncn/lib/instl-sncn-regist-schema.ts
@@ -77,7 +77,7 @@ export const instlSncnRegistSchema = z.object({
   ),
   splmntDmndList: z.array(
     z.object({
-      splmntDmndSn: z.number().optional(),
+      splmntDmndSn: z.number().nullish(),
       splmntArtclComCd: z.string().optional(),
       splmntArtclCdNm: z.string().nullish(),
       splmntDmndCn: z.string().optional(),
diff --git a/apps/as/src/pages/instl-sncn/ui/components/checklist-task-panel.tsx b/apps/as/src/pages/instl-sncn/ui/components/checklist-task-panel.tsx
index d4509263b..df73d904a 100644
--- a/apps/as/src/pages/instl-sncn/ui/components/checklist-task-panel.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/components/checklist-task-panel.tsx
@@ -45,12 +45,7 @@ function ChecklistTaskPanel({
         .forEach((row) => {
           nextResults[buildChecklistRowKey(row, selectedReviewStep)] = value;
         });
-      return patchChecklistFormState(
-        prev,
-        { results: nextResults },
-        allRows,
-        selectedReviewStep,
-      );
+      return patchChecklistFormState(prev, { results: nextResults }, allRows, selectedReviewStep);
     });
   }
 
@@ -76,6 +71,7 @@ function ChecklistTaskPanel({
                 <Button
                   type="button"
                   size="sm"
+                  color="white"
                   disabled={!isStepEditable}
                   onClick={() => handleSelectAll("Y")}
                 >
@@ -86,9 +82,9 @@ function ChecklistTaskPanel({
                 <Button
                   type="button"
                   size="sm"
+                  color="gray"
                   disabled={!isStepEditable}
                   onClick={() => handleSelectAll("N")}
-                  className="!bg-destructive"
                 >
                   전체 아니오
                 </Button>
diff --git a/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx
index e3c0d8119..a7610e355 100644
--- a/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/components/floating-action-buttons.tsx
@@ -511,6 +511,7 @@ function FloatingActionButtons({
       />
 
       <SplmntDmndDialog
+        splmntArtclUpCd="SPLMNTARTCL"
         open={activeDialog === "dmndSplmnt"}
         onOpenChange={() => setActiveDialog(null)}
         isSubmitting={isProcessing}
diff --git a/apps/as/src/pages/instl-sncn/ui/instl-form-page.tsx b/apps/as/src/pages/instl-sncn/ui/instl-form-page.tsx
index 766712e35..bc248e3b2 100644
--- a/apps/as/src/pages/instl-sncn/ui/instl-form-page.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/instl-form-page.tsx
@@ -9,6 +9,7 @@ import { zodResolver } from "@hookform/resolvers/zod";
 import { useQueryClient } from "@tanstack/react-query";
 
 import { useAlertStore, useUserStore } from "@/shared/lib";
+import { useEsntlAtchFileMngTree } from "@/entities/esntl";
 import {
   type InstlSncnApplySaveRequestDto,
   instlSncnKeys,
@@ -22,6 +23,7 @@ import {
   ChecklistFormSection,
   ContactInfoFormSection,
   isFormChecklistComplete,
+  isFormEsntlAtchComplete,
   PrivacyConsentSection,
   SplmntDmndFormSection,
 } from "@/widgets/pbadms-sprt";
@@ -57,6 +59,8 @@ function InstlFormPage({ id, mode, initialData, createDefaults }: InstlFormPageP
   const isEditMode = mode === "edit";
   const isSplmntPrgrsStts = initialData?.detDto.prgrsSttsComCd === "SL";
 
+  const { data: essentialFiles = [] } = useEsntlAtchFileMngTree({ docSeComCd: "INSTL" });
+
   const form = useForm<InstlSncnRegistFormData>({
     resolver: zodResolver(instlSncnRegistSchema),
     mode: "onChange",
@@ -172,6 +176,11 @@ function InstlFormPage({ id, mode, initialData, createDefaults }: InstlFormPageP
       return;
     }
 
+    if (!isFormEsntlAtchComplete(essentialFiles, data.esntlAtchFileList)) {
+      alert("필수 첨부파일을 모두 등록해야 신청이 가능합니다.");
+      return;
+    }
+
     try {
       setIsSubmitting(true);
       const instlSncnDocNo = await submitForm(data, "ST");
diff --git a/apps/as/src/pages/instl-sncn/ui/sections/attachments-section.tsx b/apps/as/src/pages/instl-sncn/ui/sections/attachments-section.tsx
index d518e80dc..5cd7fec89 100644
--- a/apps/as/src/pages/instl-sncn/ui/sections/attachments-section.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/sections/attachments-section.tsx
@@ -19,98 +19,104 @@ function AttachmentsSection({ esntlFileList, etcFileList }: AttachmentsSectionPr
 
   return (
     <>
-      <SectionCollapsible title="필수 첨부파일">
-        <div className="overflow-x-auto">
-          <Table variant="secondary">
-            <TableHeader>
-              <TableRow>
-                <TableHead>필수 자료명</TableHead>
-                <TableHead>파일명</TableHead>
-                <TableHead className="w-[8rem] text-right">크기</TableHead>
-              </TableRow>
-            </TableHeader>
-            <TableBody>
-              {esntlFileList.length === 0 ? (
+      {esntlFileList.length > 0 && (
+        <SectionCollapsible title="필수 첨부파일">
+          <div className="overflow-x-auto">
+            <Table variant="secondary">
+              <TableHeader>
                 <TableRow>
-                  <TableCell colSpan={3} className="py-12 text-center text-muted-foreground">
-                    조회된 필수 첨부파일 항목이 없습니다.
-                  </TableCell>
+                  <TableHead>필수 자료명</TableHead>
+                  <TableHead>파일명</TableHead>
+                  <TableHead className="w-[8rem] text-right">크기</TableHead>
                 </TableRow>
-              ) : (
-                esntlFileList.map((file) => (
-                  <TableRow key={file.esntlAtchFileId}>
-                    <TableCell className="pl-2 text-left">
-                      {file.esntlAtchFileNm}
-                      {file.esntlAtchYn === "Y" ? (
-                        <span className="ml-1 text-red-500">*</span>
-                      ) : null}
+              </TableHeader>
+              <TableBody>
+                {esntlFileList.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={3} className="py-12 text-center text-muted-foreground">
+                      조회된 필수 첨부파일 항목이 없습니다.
                     </TableCell>
-                    <TableCell className="text-left">
-                      {file.atflCd ? (
-                        <a
-                          className="cursor-pointer text-blue-600 hover:underline"
-                          onClick={() => downloadAttachment(file.atflCd ?? "")}
-                          target="_blank"
-                          rel="noreferrer"
-                        >
-                          {file.orgnlFileNm || "다운로드"}
-                        </a>
-                      ) : (
-                        <span className="text-gray-500">첨부없음</span>
-                      )}
-                    </TableCell>
-                    <TableCell className="text-right">{formatFileSize(file.atflFlieSz)}</TableCell>
                   </TableRow>
-                ))
-              )}
-            </TableBody>
-          </Table>
-        </div>
-      </SectionCollapsible>
+                ) : (
+                  esntlFileList.map((file) => (
+                    <TableRow key={file.esntlAtchFileId}>
+                      <TableCell className="pl-2 text-left">
+                        {file.esntlAtchFileNm}
+                        {file.esntlAtchYn === "Y" ? (
+                          <span className="ml-1 text-red-500">*</span>
+                        ) : null}
+                      </TableCell>
+                      <TableCell className="text-left">
+                        {file.atflCd ? (
+                          <a
+                            className="cursor-pointer text-blue-600 hover:underline"
+                            onClick={() => downloadAttachment(file.atflCd ?? "")}
+                            target="_blank"
+                            rel="noreferrer"
+                          >
+                            {file.orgnlFileNm || "다운로드"}
+                          </a>
+                        ) : (
+                          <span className="text-gray-500">첨부없음</span>
+                        )}
+                      </TableCell>
+                      <TableCell className="text-right">
+                        {formatFileSize(file.atflFlieSz)}
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </div>
+        </SectionCollapsible>
+      )}
 
-      <SectionCollapsible title="기타 첨부파일">
-        <div className="overflow-x-auto">
-          <Table variant="secondary">
-            <TableHeader>
-              <TableRow>
-                <TableHead>파일명</TableHead>
-                <TableHead className="w-[8rem] text-right">크기</TableHead>
-              </TableRow>
-            </TableHeader>
-            <TableBody>
-              {etcFileList.length === 0 ? (
+      {etcFileList.length > 0 && (
+        <SectionCollapsible title="기타 첨부파일">
+          <div className="overflow-x-auto">
+            <Table variant="secondary">
+              <TableHeader>
                 <TableRow>
-                  <TableCell colSpan={2} className="py-12 text-center text-muted-foreground">
-                    등록된 기타첨부파일이 없습니다.
-                  </TableCell>
+                  <TableHead>파일명</TableHead>
+                  <TableHead className="w-[8rem] text-right">크기</TableHead>
                 </TableRow>
-              ) : (
-                etcFileList.map((file) => (
-                  <TableRow key={file.atflId}>
-                    <TableCell className="text-left">
-                      {file.atflCd ? (
-                        <a
-                          className="cursor-pointer text-blue-600 hover:underline"
-                          onClick={() => downloadAttachment(file.atflCd)}
-                          target="_blank"
-                          rel="noreferrer"
-                        >
-                          {file.orgnlFileNm || file.physFileNm || file.atflId}
-                        </a>
-                      ) : (
-                        <span>{file.orgnlFileNm || file.physFileNm || file.atflId}</span>
-                      )}
-                    </TableCell>
-                    <TableCell className="text-right text-gray-500">
-                      {formatFileSize(file.atflFlieSz)}
+              </TableHeader>
+              <TableBody>
+                {etcFileList.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={2} className="py-12 text-center text-muted-foreground">
+                      등록된 기타첨부파일이 없습니다.
                     </TableCell>
                   </TableRow>
-                ))
-              )}
-            </TableBody>
-          </Table>
-        </div>
-      </SectionCollapsible>
+                ) : (
+                  etcFileList.map((file) => (
+                    <TableRow key={file.atflId}>
+                      <TableCell className="text-left">
+                        {file.atflCd ? (
+                          <a
+                            className="cursor-pointer text-blue-600 hover:underline"
+                            onClick={() => downloadAttachment(file.atflCd)}
+                            target="_blank"
+                            rel="noreferrer"
+                          >
+                            {file.orgnlFileNm || file.physFileNm || file.atflId}
+                          </a>
+                        ) : (
+                          <span>{file.orgnlFileNm || file.physFileNm || file.atflId}</span>
+                        )}
+                      </TableCell>
+                      <TableCell className="text-right text-gray-500">
+                        {formatFileSize(file.atflFlieSz)}
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </div>
+        </SectionCollapsible>
+      )}
     </>
   );
 }
diff --git a/apps/as/src/pages/instl-sncn/ui/sections/checklist-section.tsx b/apps/as/src/pages/instl-sncn/ui/sections/checklist-section.tsx
index 0846d2b3e..2f370a5d7 100644
--- a/apps/as/src/pages/instl-sncn/ui/sections/checklist-section.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/sections/checklist-section.tsx
@@ -70,6 +70,10 @@ function ChecklistSection({
 
   const { total, completed, percent } = progress;
 
+  if (cklstResultList.length === 0) {
+    return null;
+  }
+
   return (
     <SectionCollapsible title="체크리스트">
       <div className="flex flex-col gap-4 p-2">
diff --git a/apps/as/src/pages/instl-sncn/ui/sections/tech-review-opinion-section.tsx b/apps/as/src/pages/instl-sncn/ui/sections/tech-review-opinion-section.tsx
index 2227492ed..62efef962 100644
--- a/apps/as/src/pages/instl-sncn/ui/sections/tech-review-opinion-section.tsx
+++ b/apps/as/src/pages/instl-sncn/ui/sections/tech-review-opinion-section.tsx
@@ -2,8 +2,11 @@
 
 import { forwardRef, useEffect, useImperativeHandle, useState } from "react";
 
+import { Paperclip } from "lucide-react";
+
 import { PROXY_HOST } from "@/shared/config";
 import { dayjs, getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
 import { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
 import { attachService } from "@/entities/attach";
 import type { InstlSncnRvwOpnnResponseDto, ReviewStepCode } from "@/entities/instl-sncn";
@@ -67,12 +70,10 @@ function hasFormContent(formData: ReviewOpinionFormData) {
 const TechReviewOpinionSection = forwardRef<
   TechReviewOpinionSectionHandle,
   TechReviewOpinionSectionProps
->(function TechReviewOpinionSection({
-  rvwList,
-  editableReviewStep,
-  atrzSeComCdList = [],
-  isAtrzLoading = false,
-}, ref) {
+>(function TechReviewOpinionSection(
+  { rvwList, editableReviewStep, atrzSeComCdList = [], isAtrzLoading = false },
+  ref,
+) {
   const canWriteKecoOpinion = !isAtrzLoading && atrzSeComCdList.includes("ATRZ02");
   const [formData, setFormData] = useState<ReviewOpinionFormData>({
     ...EMPTY_FORM_DATA,
@@ -240,7 +241,9 @@ const TechReviewOpinionSection = forwardRef<
               <TableCell>
                 {uploadedFile ? (
                   <div className="flex items-center gap-2">
-                    <span className="text-xl">{uploadedFile.fileName}</span>
+                    <TextShimmer className="text-xl" active={uploading}>
+                      {uploadedFile.fileName}
+                    </TextShimmer>
                     <Button
                       size="icon"
                       onClick={(e) => {
@@ -329,11 +332,12 @@ function TechReviewOpinionTable({ items }: TechReviewOpinionTableProps) {
               <TableCell align="center">
                 {item.atchFileInfo?.atflCd ? (
                   <a
-                    className="text-blue-600 hover:underline"
+                    className="inline-flex cursor-pointer items-start gap-1 text-left text-blue-600 hover:underline"
                     href={`${PROXY_HOST}/attach-service/api/v1/atflcd/download/${item.atchFileInfo.atflCd}`}
                     target="_blank"
                     rel="noreferrer"
                   >
+                    <Paperclip className="my-1 size-5 shrink-0" />
                     {item.atchFileInfo.orgnlFileNm || "다운로드"}
                   </a>
                 ) : (
diff --git a/apps/as/src/pages/sewer-bsc-plan/index.ts b/apps/as/src/pages/sewer-bsc-plan/index.ts
index 39f824683..c77a4da99 100644
--- a/apps/as/src/pages/sewer-bsc-plan/index.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/index.ts
@@ -2,3 +2,4 @@ export { SewerBscPlanEditPage } from "./ui/sewer-bsc-plan-edit-page";
 export { SewerBscPlanFormPage } from "./ui/sewer-bsc-plan-form-page";
 export { SewerBscPlanListPage } from "./ui/sewer-bsc-plan-list-page";
 export { SewerBscPlanRegistPage } from "./ui/sewer-bsc-plan-regist-page";
+export { SewerBscPlanViewPage } from "./ui/sewer-bsc-plan-view-page";
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/button-config.ts b/apps/as/src/pages/sewer-bsc-plan/lib/button-config.ts
new file mode 100644
index 000000000..062dcf7e1
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/button-config.ts
@@ -0,0 +1,129 @@
+export const SEWER_BSC_PLAN_VIEW_BUTTON_ACTION = {
+  strg: "strg",
+  aply: "aply",
+  del: "del",
+  rvwRply: "rvwRply",
+  rqstTechRvw: "rqstTechRvw",
+  dsgntRvwr: "dsgntRvwr",
+  rvwStrg: "rvwStrg",
+  rvwCmptn: "rvwCmptn",
+  dmndSplmnt: "dmndSplmnt",
+  atrzAprv: "atrzAprv",
+  atrzRply: "atrzRply",
+} as const;
+
+export type SewerBscPlanViewButtonAction =
+  (typeof SEWER_BSC_PLAN_VIEW_BUTTON_ACTION)[keyof typeof SEWER_BSC_PLAN_VIEW_BUTTON_ACTION];
+
+const ROLE_STATUS_BUTTON_ACTIONS: Record<string, Record<string, SewerBscPlanViewButtonAction[]>> = {
+  ROLE_USER05: {
+    "": [
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.strg,
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.aply,
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.del,
+    ],
+    SV: [
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.strg,
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.aply,
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.del,
+    ],
+  },
+  ROLE_USER03: {
+    LE: [SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwRply, SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rqstTechRvw],
+    TP: [SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwRply],
+  },
+};
+
+const ROLE_USER01_ATRZ_STATUS_CODES = ["ER", "TE"] as const;
+
+const ROLE_USER01_ATRZ_STATUS_ACTIONS: Record<
+  string,
+  Record<string, SewerBscPlanViewButtonAction[]>
+> = {
+  ER: {
+    ATRZ01: [SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dsgntRvwr],
+  },
+  TE: {
+    ATRZ02: [
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwStrg,
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwCmptn,
+      SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dmndSplmnt,
+    ],
+    ATRZ03: [SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.atrzAprv],
+    ATRZ99: [SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.atrzRply],
+  },
+};
+
+function resolveButtonConfigs(
+  actions: SewerBscPlanViewButtonAction[],
+): SewerBscPlanViewButtonAction[] {
+  return actions.map((action) => SEWER_BSC_PLAN_VIEW_BUTTON_ACTION[action]);
+}
+
+interface GetButtonConfigsOptions {
+  hasPendingApprovalRequest?: boolean;
+}
+
+function resolveRoleUser01AtrzButtonActions(
+  prgrsSttsComCd: string,
+  atrzSeComCdList: string[],
+  options?: GetButtonConfigsOptions,
+): SewerBscPlanViewButtonAction[] {
+  if (prgrsSttsComCd === "TE" && options?.hasPendingApprovalRequest === false) {
+    return [];
+  }
+
+  const atrzStatusMap = ROLE_USER01_ATRZ_STATUS_ACTIONS[prgrsSttsComCd];
+  if (!atrzStatusMap || atrzSeComCdList.length === 0) return [];
+
+  const seen = new Set<SewerBscPlanViewButtonAction>();
+  const actions: SewerBscPlanViewButtonAction[] = [];
+
+  for (const atrzSeComCd of atrzSeComCdList) {
+    const mappedActions = atrzStatusMap[atrzSeComCd];
+    if (!mappedActions) continue;
+
+    for (const action of mappedActions) {
+      if (seen.has(action)) continue;
+      seen.add(action);
+      actions.push(action);
+    }
+  }
+
+  return actions;
+}
+
+export function needsRoleUser01AtrzResolve(
+  dtlInstCd: string | undefined,
+  prgrsSttsComCd: string,
+): boolean {
+  return (
+    dtlInstCd === "ROLE_USER01" &&
+    ROLE_USER01_ATRZ_STATUS_CODES.includes(
+      prgrsSttsComCd as (typeof ROLE_USER01_ATRZ_STATUS_CODES)[number],
+    )
+  );
+}
+
+export function getButtonConfigs(
+  dtlInstCd: string | undefined,
+  prgrsSttsComCd: string,
+  atrzSeComCdList?: string[],
+  options?: GetButtonConfigsOptions,
+): SewerBscPlanViewButtonAction[] {
+  if (!dtlInstCd) return [];
+
+  if (needsRoleUser01AtrzResolve(dtlInstCd, prgrsSttsComCd)) {
+    return resolveButtonConfigs(
+      resolveRoleUser01AtrzButtonActions(prgrsSttsComCd, atrzSeComCdList ?? [], options),
+    );
+  }
+
+  const statusMap = ROLE_STATUS_BUTTON_ACTIONS[dtlInstCd];
+  if (!statusMap) return [];
+
+  const actions = statusMap[prgrsSttsComCd];
+  if (!actions) return [];
+
+  return resolveButtonConfigs(actions);
+}
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/checklist-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/checklist-utils.ts
new file mode 100644
index 000000000..89e82a3d8
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/checklist-utils.ts
@@ -0,0 +1,178 @@
+import type { CklstResultItem, CklstRvwRsltTreeDto } from "@/entities/sewer-bsc-plan";
+
+import {
+  type ChecklistFormState,
+  type ChecklistProgress,
+  type ChecklistRowKey,
+  type ChecklistStepMap,
+  REVIEW_STEP_CODES,
+  type ReviewStepCode,
+} from "../model/view-types";
+
+export function buildChecklistRowKey(
+  row: CklstRvwRsltTreeDto,
+  reviewStep?: ReviewStepCode,
+): ChecklistRowKey {
+  const step = reviewStep ?? (row.rvwStpComCd as ReviewStepCode) ?? "LOCAL";
+  return `${row.taskSeComCd}_${row.cklstSn}_${row.cklstArtclSn}_${row.cklstRvwSn}_${step}`;
+}
+
+export function groupByReviewStep(rows: CklstRvwRsltTreeDto[]): ChecklistStepMap {
+  const base: ChecklistStepMap = { LOCAL: [], ENV: [], KECO: [] };
+  rows.forEach((row) => {
+    const step = (row.rvwStpComCd ?? "LOCAL") as ReviewStepCode;
+    if (REVIEW_STEP_CODES.includes(step)) base[step].push(row);
+  });
+  return base;
+}
+
+export function extractTaskCodes(rows: CklstRvwRsltTreeDto[]): string[] {
+  return Array.from(new Set(rows.map((row) => row.taskSeComCd).filter(Boolean))) as string[];
+}
+
+export function filterChecklistRows(
+  rows: CklstRvwRsltTreeDto[],
+  taskCode: string | null,
+): CklstRvwRsltTreeDto[] {
+  return rows.filter((row) => (taskCode ? row.taskSeComCd === taskCode : true)).slice();
+}
+
+export function getChecklistDisplayRows(
+  rows: CklstRvwRsltTreeDto[],
+  taskCode?: string | null,
+): CklstRvwRsltTreeDto[] {
+  const filtered = filterChecklistRows(rows, taskCode ?? null);
+  const seen = new Set<string>();
+  const deduped: CklstRvwRsltTreeDto[] = [];
+
+  for (const row of filtered) {
+    const dedupeKey = `${row.taskSeComCd}_${row.cklstRvwSn}`;
+    if (seen.has(dedupeKey)) continue;
+    seen.add(dedupeKey);
+    deduped.push(row);
+  }
+
+  return deduped;
+}
+
+export function computeChecklistProgress(
+  rows: CklstRvwRsltTreeDto[],
+  results: ChecklistFormState["results"],
+): ChecklistProgress {
+  const activeRows = rows.filter((row) => row.bchckUseYn === "Y");
+  const total = activeRows.length;
+  const completed = activeRows.reduce((acc, row) => {
+    const key = buildChecklistRowKey(row);
+    const val = results[key] ?? row.rvwRsltAnmlyYn ?? "";
+    return acc + (val ? 1 : 0);
+  }, 0);
+  const percent = total > 0 ? Math.round((completed / total) * 100) : 0;
+  return { total, completed, percent };
+}
+
+export function filterChecklistRowsByReviewStep(
+  rows: CklstRvwRsltTreeDto[],
+  reviewStep: ReviewStepCode,
+): CklstRvwRsltTreeDto[] {
+  return rows.filter((row) => row.rvwStpComCd === reviewStep);
+}
+
+export function computeReviewStepChecklistProgress(
+  rows: CklstRvwRsltTreeDto[],
+  results: ChecklistFormState["results"],
+  reviewStep: ReviewStepCode,
+): ChecklistProgress {
+  const activeRows = getChecklistDisplayRows(rows).filter((row) => row.bchckUseYn === "Y");
+  const total = activeRows.length;
+  const completed = activeRows.reduce((acc, row) => {
+    const key = buildChecklistRowKey(row, reviewStep);
+    const val = results[key];
+    return acc + (val === "Y" || val === "N" ? 1 : 0);
+  }, 0);
+  const percent = total > 0 ? Math.round((completed / total) * 100) : 100;
+  return { total, completed, percent };
+}
+
+export function buildChecklistFormState(rows: CklstRvwRsltTreeDto[]): ChecklistFormState {
+  const results: ChecklistFormState["results"] = {};
+  const comments: ChecklistFormState["comments"] = {};
+  rows.forEach((row) => {
+    const key = buildChecklistRowKey(row);
+    if (row.rvwRsltAnmlyYn === "Y" || row.rvwRsltAnmlyYn === "N") {
+      results[key] = row.rvwRsltAnmlyYn;
+    }
+    if (row.picRvwCn) comments[key] = row.picRvwCn;
+  });
+  return {
+    results,
+    comments,
+    progress: computeChecklistProgress(rows, results),
+  };
+}
+
+export function mergeChecklistFormStateFromServer(
+  prev: ChecklistFormState,
+  allRows: CklstRvwRsltTreeDto[],
+): ChecklistFormState {
+  const results = { ...prev.results };
+  const comments = { ...prev.comments };
+
+  for (const row of allRows) {
+    const step = row.rvwStpComCd as ReviewStepCode | undefined;
+    if (!step || !REVIEW_STEP_CODES.includes(step)) continue;
+
+    const key = buildChecklistRowKey(row);
+    if ((row.rvwRsltAnmlyYn === "Y" || row.rvwRsltAnmlyYn === "N") && results[key] === undefined) {
+      results[key] = row.rvwRsltAnmlyYn;
+    }
+    if (row.picRvwCn && !comments[key]) {
+      comments[key] = row.picRvwCn;
+    }
+  }
+
+  return {
+    results,
+    comments,
+    progress: computeChecklistProgress(getChecklistDisplayRows(allRows), results),
+  };
+}
+
+export function patchChecklistFormState(
+  prev: ChecklistFormState,
+  patch: Partial<Pick<ChecklistFormState, "results" | "comments">>,
+  allRows: CklstRvwRsltTreeDto[],
+  reviewStep?: ReviewStepCode,
+): ChecklistFormState {
+  const results = patch.results ?? prev.results;
+  const comments = patch.comments ?? prev.comments;
+  const progress = reviewStep
+    ? computeReviewStepChecklistProgress(allRows, results, reviewStep)
+    : computeChecklistProgress(getChecklistDisplayRows(allRows), results);
+
+  return {
+    results,
+    comments,
+    progress,
+  };
+}
+
+export function toCklstSaveDto(
+  rows: CklstRvwRsltTreeDto[],
+  formState: ChecklistFormState,
+  reviewStep: ReviewStepCode,
+): CklstResultItem[] {
+  return getChecklistDisplayRows(rows)
+    .filter((row) => row.bchckUseYn === "Y")
+    .map((row) => {
+      const key = buildChecklistRowKey(row, reviewStep);
+      const selected = formState.results[key] ?? null;
+      return {
+        cklstSn: row.cklstSn,
+        cklstArtclSn: row.cklstArtclSn,
+        cklstRvwSn: row.cklstRvwSn,
+        rvwStpComCd: reviewStep,
+        selected: selected ?? undefined,
+        picRvwCn: formState.comments[key] ?? null,
+      };
+    });
+}
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/form-data-mapper.ts b/apps/as/src/pages/sewer-bsc-plan/lib/form-data-mapper.ts
index 7a6b1f0ac..6f84154d5 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/form-data-mapper.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/form-data-mapper.ts
@@ -3,6 +3,7 @@ import type {
   SewerBscPlanApplySaveRequestDto,
   SewerBscPlanDetResponseDto,
 } from "@/entities/sewer-bsc-plan";
+import { sewerBscPlanApplySaveSchema } from "@/entities/sewer-bsc-plan";
 
 import type { BizCstMatrixItem } from "./biz-cst-matrix-utils";
 import { recalcFnrsCstSumAmt } from "./fnrs-cst-form-utils";
@@ -244,43 +245,33 @@ export function buildApplyPayload(
   prgrsSttsComCd: "SV" | "LE" | "TE",
   options?: { isEditMode?: boolean; docNo?: string },
 ): SewerBscPlanApplySaveRequestDto {
-  const { taskSeComCd, ...sewerBscPlanRest } = data.sewerBscPlan;
+  const docNo = options?.isEditMode ? options.docNo : undefined;
 
-  return {
+  return sewerBscPlanApplySaveSchema.parse({
     sewerBscPlan: {
-      ...sewerBscPlanRest,
-      taskSeComCd: taskSeComCd ?? "",
-      sewerBscPlanDocNo: options?.isEditMode ? options.docNo : undefined,
+      ...data.sewerBscPlan,
+      sewerBscPlanDocNo: docNo,
+      taskSeComCd: data.sewerBscPlan.taskSeComCd ?? "",
       prgrsSttsComCd,
     },
     sewerBscPlanDtl: {
       ...data.sewerBscPlanDtl,
-      sewerBscPlanDocNo: options?.isEditMode ? options.docNo : undefined,
+      sewerBscPlanDocNo: docNo,
     },
     sewerBscPlanOtlnList: data.sewerBscPlanOtlnList,
     bizCstList: data.bizCstList,
     fnrsCstList: data.fnrsCstList.map((item) => recalcFnrsCstSumAmt(item)),
-    sewerBscPlanTmplntList: data.sewerBscPlanTmplntList.map(
-      // eslint-disable-next-line @typescript-eslint/no-unused-vars
-      ({ atchFileNm, swtrmtFcltNm, ...item }) => ({
-        swtrmtFcltCd: item.swtrmtFcltCd,
-        atchFileGroupId: item.atchFileGroupId,
-        sewerBscPlanTmplntDtlList: item.sewerBscPlanTmplntDtlList,
-      }),
-    ),
+    sewerBscPlanTmplntList: data.sewerBscPlanTmplntList,
     cklstResultList: data.cklstResultList.map((item) => ({
       ...item,
       selected: item.selected ?? undefined,
     })),
     esntlAtchFileList: data.esntlAtchFileList,
-    splmntDmndList: data.splmntDmndList.map(
-      // eslint-disable-next-line @typescript-eslint/no-unused-vars
-      ({ splmntAtchFileNm, splmntAtchFileAtflId, splmntDmndAtchFileNm, ...item }) => ({
-        ...item,
-        ...(prgrsSttsComCd === "TE" ? { cmptnYn: "Y" } : null),
-      }),
-    ),
-  };
+    splmntDmndList: data.splmntDmndList.map((item) => ({
+      ...item,
+      cmptnYn: prgrsSttsComCd === "TE" ? "Y" : item.cmptnYn,
+    })),
+  });
 }
 
 export { createEmptyTmplntDtlList };
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
new file mode 100644
index 000000000..320044a14
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
@@ -0,0 +1,176 @@
+import type {
+  EsntlAtchFileItem,
+  EsntlAtchFileMngTreeResponseDto,
+  SewerBscPlanApplySaveRequestDto,
+  SewerBscPlanDetResponseDto,
+  SewerBscPlanSplmntDmndItem,
+} from "@/entities/sewer-bsc-plan";
+import type { SplmntDmndDialogConfirmPayload } from "@/widgets/pbadms-sprt";
+
+import type { ChecklistFormState, ReviewStepCode } from "../model/view-types";
+
+import { toCklstSaveDto } from "./checklist-utils";
+import { recalcFnrsCstSumAmt } from "./fnrs-cst-form-utils";
+import { type ReviewOpinionGetFormDataResult, toRvwOpnnSaveDto } from "./review-opinion-utils";
+
+export function toEsntlAtchFileSaveDto(
+  esntlFileList: EsntlAtchFileMngTreeResponseDto[],
+): EsntlAtchFileItem[] {
+  const esntlMap = new Map<string, string>();
+
+  for (const item of esntlFileList) {
+    if (!item.esntlAtchFileId || !item.atflCd) continue;
+    esntlMap.set(item.esntlAtchFileId, item.atflCd);
+  }
+
+  return Array.from(esntlMap.entries()).map(([esntlAtchFileId, atchFileGroupId]) => ({
+    esntlAtchFileId,
+    atchFileGroupId,
+  }));
+}
+
+export function buildSavePayload(
+  data: SewerBscPlanDetResponseDto,
+  checklistFormState: ChecklistFormState,
+  reviewStep: ReviewStepCode,
+  prgrsSttsComCd: string,
+): SewerBscPlanApplySaveRequestDto {
+  const detDto = data.detDto;
+  const dtl = data.activeDtlDto;
+  if (!detDto) {
+    throw new Error("상세 정보(detDto)가 없습니다.");
+  }
+
+  const cklstResultRows = data.cklstResultRows ?? [];
+  const esntlFileList = data.esntlFileList ?? [];
+
+  return {
+    sewerBscPlan: {
+      sewerBscPlanDocNo: detDto.sewerBscPlanDocNo,
+      admdstCd: detDto.admdstCd,
+      envoSeComCd: detDto.envoSeComCd,
+      sewerBscPlanSeComCd: detDto.sewerBscPlanSeComCd,
+      sewerBscPlanNm: detDto.sewerBscPlanNm,
+      taskSeComCd: detDto.taskSeComCd,
+      prgrsSttsComCd,
+    },
+    sewerBscPlanDtl: {
+      sewerBscPlanDocNo: detDto.sewerBscPlanDocNo,
+      chgCycl: dtl?.chgCycl ?? detDto.chgCycl,
+      aplcntNm: dtl?.aplcntNm,
+      aplcntMblTelno: dtl?.aplcntMblTelno,
+      aplcntOgdpNm: dtl?.aplcntOgdpNm,
+      aplcntEmlAddr: dtl?.aplcntEmlAddr,
+      dsgnrNm: dtl?.dsgnrNm,
+      dsgnrTelno: dtl?.dsgnrTelno,
+      dsgnrOgdpNm: dtl?.dsgnrOgdpNm,
+      dsgnrEmlAddr: dtl?.dsgnrEmlAddr,
+      planYr: dtl?.planYr,
+      crtrYr: dtl?.crtrYr,
+      bizOtlnCn: dtl?.bizOtlnCn,
+      frlvlGoalYr: dtl?.frlvlGoalYr,
+      sclvlGoalYr: dtl?.sclvlGoalYr,
+      thlvlGoalYr: dtl?.thlvlGoalYr,
+      folvlGoalYr: dtl?.folvlGoalYr,
+      atchFileGroupId: dtl?.atchFileGroupId,
+    },
+    sewerBscPlanOtlnList: (data.otlnList ?? []).map((item) => ({
+      planStpNo: item.planStpNo,
+      sewerPlanPpltnCnt: item.sewerPlanPpltnCnt,
+      sewerPrcsPpltnCnt: item.sewerPrcsPpltnCnt,
+      sewerPsplyRt: item.sewerPsplyRt,
+    })),
+    bizCstList: (data.bizCstList ?? []).map((item) => ({
+      planStpNo: item.planStpNo,
+      acntgSeCd: item.acntgSeCd,
+      cstrnAmt: item.cstrnAmt,
+    })),
+    fnrsCstList: (data.fnrsCstList ?? []).map((item) =>
+      recalcFnrsCstSumAmt({
+        planStpNo: item.planStpNo ?? 1,
+        gvexpAmt: item.gvexpAmt ?? 0,
+        lcexpAmt: item.lcexpAmt ?? 0,
+        orgprBdchgAmt: item.orgprBdchgAmt ?? 0,
+        etcAmt: item.etcAmt ?? 0,
+        sumAmt: item.sumAmt ?? 0,
+      }),
+    ),
+    sewerBscPlanTmplntList: (data.tmplntList ?? []).map((item) => ({
+      swtrmtFcltCd: item.swtrmtFcltCd,
+      atchFileGroupId: item.atchFileGroupId,
+      sewerBscPlanTmplntDtlList: (item.sewerBscPlanTmplntDtlList ?? []).map((dtlItem) => ({
+        planStpNo: dtlItem.planStpNo,
+        swtrmtFcltCd: dtlItem.swtrmtFcltCd ?? item.swtrmtFcltCd,
+        prcsZoneArea: dtlItem.prcsZoneArea,
+        swtrmtPpltnCnt: dtlItem.swtrmtPpltnCnt,
+        planSwqty: dtlItem.planSwqty,
+        fcltCpct: dtlItem.fcltCpct,
+        sprsysDrtwPplLen: dtlItem.sprsysDrtwPplLen,
+        sprsysExlnPplLen: dtlItem.sprsysExlnPplLen,
+        cbsysPplLen: dtlItem.cbsysPplLen,
+        icptgPplLen: dtlItem.icptgPplLen,
+        drgCnt: dtlItem.drgCnt,
+        drtwRlyPumpCnt: dtlItem.drtwRlyPumpCnt,
+        drtwPumpCnt: dtlItem.drtwPumpCnt,
+        exlnPumpCnt: dtlItem.exlnPumpCnt,
+      })),
+    })),
+    cklstResultList: toCklstSaveDto(cklstResultRows, checklistFormState, reviewStep),
+    esntlAtchFileList: toEsntlAtchFileSaveDto(esntlFileList),
+  };
+}
+
+export function buildTechReviewReplyPayload(
+  data: SewerBscPlanDetResponseDto,
+  checklistFormState: ChecklistFormState,
+  reviewStep: ReviewStepCode,
+  prgrsSttsComCd: string,
+  techReViewSaveCd: string,
+  reviewOpinionFormData?: ReviewOpinionGetFormDataResult | null,
+  opnrNm?: string,
+): SewerBscPlanApplySaveRequestDto {
+  return {
+    ...buildSavePayload(data, checklistFormState, reviewStep, prgrsSttsComCd),
+    techReViewSaveCd,
+    rvwStpCd: reviewStep,
+    rvwOpnnList: toRvwOpnnSaveDto(data, reviewOpinionFormData, opnrNm),
+  };
+}
+
+export function buildSupplementReqPayload(
+  data: SewerBscPlanDetResponseDto,
+  payload: SplmntDmndDialogConfirmPayload,
+  checklistFormState: ChecklistFormState,
+): SewerBscPlanApplySaveRequestDto {
+  const existingItems: SewerBscPlanSplmntDmndItem[] = (data.splmntDmndList ?? []).map((item) =>
+    toSplmntDmndSaveItem(item),
+  );
+
+  const newItems: SewerBscPlanSplmntDmndItem[] = payload.items.map((item) => ({
+    splmntDmndSn: null,
+    splmntArtclComCd: item.splmntArtclComCd,
+    splmntDmndCn: item.splmntDmndCn,
+    splmntDmndAtchFileGroupId: item.splmntDmndAtchFileGroupId,
+    cmptnYn: "N",
+  }));
+
+  return {
+    ...buildSavePayload(data, checklistFormState, "LOCAL", "SL"),
+    splmntDmndList: [...existingItems, ...newItems],
+  };
+}
+
+export function toSplmntDmndSaveItem(item: SewerBscPlanSplmntDmndItem): SewerBscPlanSplmntDmndItem {
+  return {
+    splmntDmndSn: item.splmntDmndSn,
+    splmntArtclComCd: item.splmntArtclComCd,
+    splmntDmndCn: item.splmntDmndCn,
+    splmntDmndDt: item.splmntDmndDt,
+    splmntDmndAtchFileGroupId: item.splmntDmndAtchFileGroupId,
+    splmntCn: item.splmntCn,
+    splmntPicNm: item.splmntPicNm,
+    splmntCmptnDt: item.splmntCmptnDt,
+    splmntAtchFileGroupId: item.splmntAtchFileGroupId,
+    cmptnYn: item.cmptnYn,
+  };
+}
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/review-opinion-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/review-opinion-utils.ts
new file mode 100644
index 000000000..91b11b67c
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/review-opinion-utils.ts
@@ -0,0 +1,87 @@
+import type {
+  SewerBscPlanDetResponseDto,
+  SewerBscPlanRvwOpnnItem,
+  SewerBscPlanRvwOpnnResponseDto,
+} from "@/entities/sewer-bsc-plan";
+
+export interface ReviewOpinionFormData {
+  rvwRsltCn: string;
+  rvwRsltAnmlyYn: "Y" | "N" | "";
+  atchFileGroupId: string;
+  opnrSeComCd: string;
+  rvwOpnnSn?: number;
+}
+
+export interface ReviewOpinionGetFormDataResult {
+  formData: ReviewOpinionFormData;
+  rvwList: SewerBscPlanRvwOpnnResponseDto[];
+}
+
+function hasReviewOpinionContent(formData: ReviewOpinionFormData) {
+  return Boolean(formData.rvwRsltCn.trim() || formData.rvwRsltAnmlyYn || formData.atchFileGroupId);
+}
+
+function mapServerItemToSaveDto(item: SewerBscPlanRvwOpnnResponseDto): SewerBscPlanRvwOpnnItem | null {
+  if (item.rvwOpnnSn == null) return null;
+
+  return {
+    rvwOpnnSn: item.rvwOpnnSn,
+    opnrSeComCd: item.opnrSeComCd,
+    opnrNm: item.opnrNm,
+    rvwRsltCn: item.rvwRsltCn,
+    rvwRsltAnmlyYn: item.rvwRsltAnmlyYn || undefined,
+    atchFileGroupId: item.atchFileGroupId || undefined,
+  };
+}
+
+function mapFormDataToSaveDto(
+  formData: ReviewOpinionFormData,
+  opnrNm?: string,
+): SewerBscPlanRvwOpnnItem {
+  const base: SewerBscPlanRvwOpnnItem = {
+    opnrSeComCd: formData.opnrSeComCd,
+    opnrNm: opnrNm ?? "",
+    rvwRsltCn: formData.rvwRsltCn,
+    rvwRsltAnmlyYn: formData.rvwRsltAnmlyYn || undefined,
+    atchFileGroupId: formData.atchFileGroupId || undefined,
+  };
+
+  if (formData.rvwOpnnSn != null) {
+    return { ...base, rvwOpnnSn: formData.rvwOpnnSn };
+  }
+
+  return base;
+}
+
+export function toRvwOpnnSaveDto(
+  data: SewerBscPlanDetResponseDto,
+  result: ReviewOpinionGetFormDataResult | null | undefined,
+  opnrNm?: string,
+): SewerBscPlanRvwOpnnItem[] | undefined {
+  if (!result || !data.detDto) return undefined;
+
+  const { formData, rvwList } = result;
+
+  const list: SewerBscPlanRvwOpnnItem[] = rvwList
+    .map((item) => mapServerItemToSaveDto(item))
+    .filter((item): item is SewerBscPlanRvwOpnnItem => item != null);
+
+  if (!hasReviewOpinionContent(formData)) {
+    return list.length > 0 ? list : undefined;
+  }
+
+  const formDto = mapFormDataToSaveDto(formData, opnrNm);
+
+  if (formData.rvwOpnnSn != null) {
+    const existingIndex = list.findIndex((item) => item.rvwOpnnSn === formData.rvwOpnnSn);
+    if (existingIndex >= 0) {
+      list[existingIndex] = formDto;
+    } else {
+      list.push(formDto);
+    }
+  } else {
+    list.push(formDto);
+  }
+
+  return list.length > 0 ? list : undefined;
+}
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/review-step-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/review-step-utils.ts
new file mode 100644
index 000000000..bce365857
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/review-step-utils.ts
@@ -0,0 +1,44 @@
+import {
+  PBADMS_PROGRESS_ORDER,
+  REVIEW_STEP_CODES,
+  REVIEW_STEP_ROLE_RANK,
+  type ReviewStepCode,
+  ROLE_TO_REVIEW_STEP,
+} from "../model/view-types";
+
+export function getProgressStepCount(prgrsSttsComCd?: string): number {
+  const idx = PBADMS_PROGRESS_ORDER.indexOf(
+    prgrsSttsComCd as (typeof PBADMS_PROGRESS_ORDER)[number],
+  );
+  if (idx <= PBADMS_PROGRESS_ORDER.indexOf("SV")) return 1;
+  if (idx <= PBADMS_PROGRESS_ORDER.indexOf("LE")) return 2;
+  return 3;
+}
+
+export function getRoleStepCount(dtlInstCd?: string): number {
+  const mapped = dtlInstCd ? ROLE_TO_REVIEW_STEP[dtlInstCd] : undefined;
+  return mapped ? REVIEW_STEP_ROLE_RANK[mapped] : 0;
+}
+
+export function getVisibleReviewSteps(
+  prgrsSttsComCd: string,
+  userRoleCode?: string,
+): ReviewStepCode[] {
+  const count = Math.min(getProgressStepCount(prgrsSttsComCd), getRoleStepCount(userRoleCode));
+  return REVIEW_STEP_CODES.slice(0, count);
+}
+
+export function getEditableReviewStep(
+  dtlInstCd?: string,
+  prgrsSttsComCd?: string,
+): ReviewStepCode | undefined {
+  if (dtlInstCd === "ROLE_USER03" && (prgrsSttsComCd === "LE" || prgrsSttsComCd === "TP")) {
+    return "ENV";
+  }
+
+  if (dtlInstCd === "ROLE_USER01" && prgrsSttsComCd === "TE") {
+    return "KECO";
+  }
+
+  return undefined;
+}
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/sewer-bsc-plan-regist-schema.ts b/apps/as/src/pages/sewer-bsc-plan/lib/sewer-bsc-plan-regist-schema.ts
index 19d0bdf90..416b1f401 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/sewer-bsc-plan-regist-schema.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/sewer-bsc-plan-regist-schema.ts
@@ -1,38 +1,27 @@
 import { z } from "zod";
 
-const tmplntDtlSchema = z.object({
-  planStpNo: z.number(),
-  swtrmtFcltCd: z.string(),
-  prcsZoneArea: z.number().optional(),
-  swtrmtPpltnCnt: z.number().optional(),
-  planSwqty: z.number().optional(),
-  fcltCpct: z.number().optional(),
-  sprsysDrtwPplLen: z.number().optional(),
-  sprsysExlnPplLen: z.number().optional(),
-  cbsysPplLen: z.number().optional(),
-  icptgPplLen: z.number().optional(),
-  drgCnt: z.number().optional(),
-  drtwRlyPumpCnt: z.number().optional(),
-  drtwPumpCnt: z.number().optional(),
-  exlnPumpCnt: z.number().optional(),
-});
+import {
+  sewerBscPlanBizCstItemSchema,
+  sewerBscPlanCklstResultItemSchema,
+  sewerBscPlanDtlSaveSchema,
+  sewerBscPlanEsntlAtchFileItemSchema,
+  sewerBscPlanFnrsCstItemSchema,
+  sewerBscPlanOtlnItemSchema,
+  sewerBscPlanSaveSchema,
+  sewerBscPlanSplmntDmndItemSchema,
+  sewerBscPlanTmplntDtlItemSchema,
+  sewerBscPlanTmplntItemSchema,
+} from "@/entities/sewer-bsc-plan";
 
 export const sewerBscPlanRegistSchema = z.object({
-  sewerBscPlan: z.object({
-    sewerBscPlanDocNo: z.string().optional(),
+  sewerBscPlan: sewerBscPlanSaveSchema.extend({
     sewerBscPlanNm: z.string().min(1, "기본계획명은 필수입니다"),
-    sewerBscPlanSeComCd: z.string().optional(),
     sewerBscPlanSeCdNm: z.string().optional(),
-    taskSeComCd: z.string().optional(),
     taskSeCdNm: z.string().optional(),
-    admdstCd: z.string().optional(),
-    envoSeComCd: z.string().optional(),
-    prgrsSttsComCd: z.string().optional(),
     sido: z.string().optional(),
-    gugun: z.string().optional(),
+    gugun: z.string().nullish(),
   }),
-  sewerBscPlanDtl: z.object({
-    chgCycl: z.number().optional(),
+  sewerBscPlanDtl: sewerBscPlanDtlSaveSchema.extend({
     planYr: z.string().min(1, "계획년도는 필수입니다"),
     crtrYr: z.string().min(1, "기준년도는 필수입니다"),
     frlvlGoalYr: z.string().min(1, "1단계 목표연도는 필수입니다"),
@@ -40,10 +29,6 @@ export const sewerBscPlanRegistSchema = z.object({
     thlvlGoalYr: z.string().min(1, "3단계 목표연도는 필수입니다"),
     folvlGoalYr: z.string().min(1, "4단계 목표연도는 필수입니다"),
     bizOtlnCn: z.string().min(1, "계획개요는 필수입니다"),
-    aplcntNm: z.string().optional(),
-    aplcntMblTelno: z.string().optional(),
-    aplcntOgdpNm: z.string().optional(),
-    aplcntEmlAddr: z.string().optional(),
     dsgnrNm: z.string().min(1, "설계자 이름은 필수입니다"),
     dsgnrTelno: z
       .string()
@@ -54,74 +39,60 @@ export const sewerBscPlanRegistSchema = z.object({
       .string()
       .min(1, "설계자 이메일은 필수입니다")
       .email("올바른 이메일 형식이 아닙니다"),
-    atchFileGroupId: z.string().optional(),
   }),
   sewerBscPlanOtlnList: z.array(
-    z.object({
+    sewerBscPlanOtlnItemSchema.extend({
       planStpNo: z.number(),
-      sewerPlanPpltnCnt: z.number().optional(),
-      sewerPrcsPpltnCnt: z.number().optional(),
-      sewerPsplyRt: z.number().optional(),
     }),
   ),
   bizCstList: z.array(
-    z.object({
+    sewerBscPlanBizCstItemSchema.extend({
       planStpNo: z.number(),
       acntgSeCd: z.string(),
       cstrnAmt: z.number(),
     }),
   ),
   fnrsCstList: z.array(
-    z.object({
+    sewerBscPlanFnrsCstItemSchema.extend({
       planStpNo: z.number(),
-      gvexpAmt: z.number().optional(),
-      lcexpAmt: z.number().optional(),
-      orgprBdchgAmt: z.number().optional(),
-      etcAmt: z.number().optional(),
-      sumAmt: z.number().optional(),
     }),
   ),
   sewerBscPlanTmplntList: z.array(
-    z.object({
+    sewerBscPlanTmplntItemSchema.extend({
       swtrmtFcltCd: z.string(),
       swtrmtFcltNm: z.string().nullish(),
-      atchFileGroupId: z.string().optional(),
       atchFileNm: z.string().optional(),
-      sewerBscPlanTmplntDtlList: z.array(tmplntDtlSchema).optional(),
+      sewerBscPlanTmplntDtlList: z
+        .array(
+          sewerBscPlanTmplntDtlItemSchema.extend({
+            planStpNo: z.number(),
+            swtrmtFcltCd: z.string(),
+          }),
+        )
+        .optional(),
     }),
   ),
   cklstResultList: z.array(
-    z.object({
+    sewerBscPlanCklstResultItemSchema.extend({
       cklstSn: z.number(),
       cklstArtclSn: z.number(),
       cklstRvwSn: z.number(),
-      rvwStpComCd: z.string(),
       selected: z.enum(["Y", "N"]).nullable(),
       picRvwCn: z.string().nullable().optional(),
     }),
   ),
   esntlAtchFileList: z.array(
-    z.object({
+    sewerBscPlanEsntlAtchFileItemSchema.extend({
       esntlAtchFileId: z.string(),
       atchFileGroupId: z.string(),
     }),
   ),
   splmntDmndList: z.array(
-    z.object({
-      splmntDmndSn: z.number().optional(),
-      splmntArtclComCd: z.string().optional(),
+    sewerBscPlanSplmntDmndItemSchema.extend({
       splmntArtclCdNm: z.string().nullish(),
-      splmntDmndCn: z.string().optional(),
-      splmntDmndDt: z.string().optional(),
-      splmntDmndAtchFileGroupId: z.string().optional(),
       splmntDmndAtchFileNm: z.string().optional(),
-      splmntCn: z.string().optional(),
-      splmntPicNm: z.string().optional(),
-      splmntCmptnDt: z.string().optional(),
-      splmntAtchFileGroupId: z.string().optional(),
       splmntAtchFileNm: z.string().optional(),
       splmntAtchFileAtflId: z.string().optional(),
-      cmptnYn: z.string().optional(),
     }),
   ),
   privacyConsent: z.enum(["Y", "N"], {
@@ -130,6 +101,3 @@ export const sewerBscPlanRegistSchema = z.object({
 });
 
 export type SewerBscPlanRegistFormData = z.infer<typeof sewerBscPlanRegistSchema>;
-
-/** 체크리스트·필수첨부 docSeComCd — CMS 합의 전 임시값 */
-export const SEWER_BSC_PLAN_DOC_SE_COM_CD = "SEWER";
diff --git a/apps/as/src/pages/sewer-bsc-plan/lib/use-checklist-form-state.ts b/apps/as/src/pages/sewer-bsc-plan/lib/use-checklist-form-state.ts
new file mode 100644
index 000000000..2bfbb58f7
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/use-checklist-form-state.ts
@@ -0,0 +1,61 @@
+import { useCallback, useEffect, useState } from "react";
+
+import type { CklstRvwRsltTreeDto } from "@/entities/sewer-bsc-plan";
+
+import {
+  type ChecklistFormState,
+  DEFAULT_CHECKLIST_PROGRESS,
+  type ReviewStepCode,
+} from "../model/view-types";
+
+import { mergeChecklistFormStateFromServer, patchChecklistFormState } from "./checklist-utils";
+
+const EMPTY_CKLST_RESULT_LIST: CklstRvwRsltTreeDto[] = [];
+
+function isSameChecklistFormState(a: ChecklistFormState, b: ChecklistFormState): boolean {
+  if (
+    a.progress.total !== b.progress.total ||
+    a.progress.completed !== b.progress.completed ||
+    a.progress.percent !== b.progress.percent
+  ) {
+    return false;
+  }
+
+  const aResultKeys = Object.keys(a.results);
+  if (aResultKeys.length !== Object.keys(b.results).length) return false;
+  if (!aResultKeys.every((key) => a.results[key] === b.results[key])) return false;
+
+  const aCommentKeys = Object.keys(a.comments);
+  if (aCommentKeys.length !== Object.keys(b.comments).length) return false;
+
+  return aCommentKeys.every((key) => a.comments[key] === b.comments[key]);
+}
+
+function useChecklistFormState(cklstResultList: CklstRvwRsltTreeDto[] = EMPTY_CKLST_RESULT_LIST) {
+  const [formState, setFormState] = useState<ChecklistFormState>({
+    results: {},
+    comments: {},
+    progress: DEFAULT_CHECKLIST_PROGRESS,
+  });
+
+  useEffect(() => {
+    setFormState((prev) => {
+      const next = mergeChecklistFormStateFromServer(prev, cklstResultList);
+      return isSameChecklistFormState(prev, next) ? prev : next;
+    });
+  }, [cklstResultList]);
+
+  const patchFormState = useCallback(
+    (
+      patch: Partial<Pick<ChecklistFormState, "results" | "comments">>,
+      reviewStep?: ReviewStepCode,
+    ) => {
+      setFormState((prev) => patchChecklistFormState(prev, patch, cklstResultList, reviewStep));
+    },
+    [cklstResultList],
+  );
+
+  return { formState, setFormState, patchFormState };
+}
+
+export { EMPTY_CKLST_RESULT_LIST, useChecklistFormState };
diff --git a/apps/as/src/pages/sewer-bsc-plan/model/columns.tsx b/apps/as/src/pages/sewer-bsc-plan/model/columns.tsx
index 4a9b03a9a..ec387c8cb 100644
--- a/apps/as/src/pages/sewer-bsc-plan/model/columns.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/model/columns.tsx
@@ -19,7 +19,7 @@ const MAIN_STEP_LABELS = {
   supplement: "보완요청",
 } as const;
 
-const TECH_REVIEW_STATUS_CODES = new Set(["EE", "ER", "TE", "TS", "TR", "TP"]);
+const TECH_REVIEW_STATUS_CODES = new Set(["ER", "TE", "TP"]);
 
 type BadgeState = "completed" | "current" | "pending" | "action";
 
@@ -42,7 +42,7 @@ function buildProgressBadges(prgrsSttsComCd: string, prgrsSttsCdNm: string): Pro
     ];
   }
 
-  if (prgrsSttsComCd === "ST") {
+  if (prgrsSttsComCd === "LE") {
     return [
       { label: MAIN_STEP_LABELS.save, state: "completed" },
       { label: MAIN_STEP_LABELS.apply, state: "completed" },
@@ -52,22 +52,13 @@ function buildProgressBadges(prgrsSttsComCd: string, prgrsSttsCdNm: string): Pro
     ];
   }
 
-  if (prgrsSttsComCd === "LE") {
-    return [
-      { label: MAIN_STEP_LABELS.save, state: "completed" },
-      { label: MAIN_STEP_LABELS.apply, state: "completed" },
-      { label: MAIN_STEP_LABELS.envoReview, state: "completed" },
-      { label: MAIN_STEP_LABELS.reply, state: "action" },
-    ];
-  }
-
   if (prgrsSttsComCd === "SL") {
     return [
       { label: MAIN_STEP_LABELS.save, state: "completed" },
       { label: MAIN_STEP_LABELS.apply, state: "completed" },
       { label: MAIN_STEP_LABELS.envoReview, state: "completed" },
-      { label: MAIN_STEP_LABELS.techReview, state: "pending" },
       { label: MAIN_STEP_LABELS.supplement, state: "action" },
+      { label: MAIN_STEP_LABELS.reply, state: "pending" },
     ];
   }
 
@@ -81,17 +72,7 @@ function buildProgressBadges(prgrsSttsComCd: string, prgrsSttsCdNm: string): Pro
     ];
   }
 
-  if (prgrsSttsComCd === "EP") {
-    return [
-      { label: MAIN_STEP_LABELS.save, state: "completed" },
-      { label: MAIN_STEP_LABELS.apply, state: "completed" },
-      { label: MAIN_STEP_LABELS.envoReview, state: "completed" },
-      { label: MAIN_STEP_LABELS.techReview, state: "completed" },
-      { label: replyLabel, state: "action" },
-    ];
-  }
-
-  if (prgrsSttsComCd === "TA" || prgrsSttsComCd === "TB") {
+  if (prgrsSttsComCd === "TA") {
     return [
       { label: MAIN_STEP_LABELS.save, state: "completed" },
       { label: MAIN_STEP_LABELS.apply, state: "completed" },
@@ -101,6 +82,16 @@ function buildProgressBadges(prgrsSttsComCd: string, prgrsSttsCdNm: string): Pro
     ];
   }
 
+  if (prgrsSttsComCd === "EP") {
+    return [
+      { label: MAIN_STEP_LABELS.save, state: "completed" },
+      { label: MAIN_STEP_LABELS.apply, state: "completed" },
+      { label: MAIN_STEP_LABELS.envoReview, state: "completed" },
+      { label: MAIN_STEP_LABELS.techReview, state: "completed" },
+      { label: replyLabel, state: "completed" },
+    ];
+  }
+
   return [{ label: prgrsSttsCdNm || prgrsSttsComCd || "-", state: "current" }];
 }
 
diff --git a/apps/as/src/pages/sewer-bsc-plan/model/view-types.ts b/apps/as/src/pages/sewer-bsc-plan/model/view-types.ts
new file mode 100644
index 000000000..48e5b61f7
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/model/view-types.ts
@@ -0,0 +1,69 @@
+import type {
+  AtflMngClientResponseDto,
+  CklstRvwRsltTreeDto,
+  EsntlAtchFileMngTreeResponseDto,
+  SewerBscPlanDetResponseDto,
+  SewerBscPlanResponseDto,
+  SewerBscPlanRvwOpnnResponseDto,
+} from "@/entities/sewer-bsc-plan";
+
+export type ReviewStepCode = "LOCAL" | "ENV" | "KECO";
+
+export type {
+  AtflMngClientResponseDto,
+  CklstRvwRsltTreeDto,
+  EsntlAtchFileMngTreeResponseDto,
+  SewerBscPlanDetResponseDto,
+  SewerBscPlanResponseDto,
+  SewerBscPlanRvwOpnnResponseDto,
+};
+
+export type ChecklistRowKey = string;
+
+export interface ChecklistProgress {
+  total: number;
+  completed: number;
+  percent: number;
+}
+
+export const DEFAULT_CHECKLIST_PROGRESS: ChecklistProgress = {
+  total: 0,
+  completed: 0,
+  percent: 0,
+};
+
+export interface ChecklistFormState {
+  results: Record<ChecklistRowKey, "Y" | "N">;
+  comments: Record<ChecklistRowKey, string>;
+  progress: ChecklistProgress;
+}
+
+export type ChecklistStepMap = Record<ReviewStepCode, CklstRvwRsltTreeDto[]>;
+
+export const REVIEW_STEP_CODES: ReviewStepCode[] = ["LOCAL", "ENV", "KECO"];
+
+export const REVIEW_STEP_LABELS: Record<ReviewStepCode, string> = {
+  LOCAL: "지자체",
+  ENV: "환경청",
+  KECO: "환경공단",
+};
+
+export const TASK_CODE_LABELS: Record<string, string> = {
+  CP: "부분변경",
+  AP: "전체변경",
+  MP: "병합",
+};
+
+export const PBADMS_PROGRESS_ORDER = ["SV", "SL", "TA", "EP", "LE", "TP", "ER", "TE"] as const;
+
+export const ROLE_TO_REVIEW_STEP: Record<string, ReviewStepCode> = {
+  ROLE_USER05: "LOCAL",
+  ROLE_USER03: "ENV",
+  ROLE_USER01: "KECO",
+};
+
+export const REVIEW_STEP_ROLE_RANK: Record<ReviewStepCode, number> = {
+  LOCAL: 1,
+  ENV: 2,
+  KECO: 3,
+};
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/components/checklist-task-panel.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/components/checklist-task-panel.tsx
new file mode 100644
index 000000000..843c6534c
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/components/checklist-task-panel.tsx
@@ -0,0 +1,196 @@
+import type { Dispatch, SetStateAction } from "react";
+
+import type { CklstRvwRsltTreeDto } from "@/entities/sewer-bsc-plan";
+import {
+  Button,
+  cn,
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+  Textarea,
+} from "@common/components";
+
+import { buildChecklistRowKey, patchChecklistFormState } from "../../lib/checklist-utils";
+import type { ReviewStepCode } from "../../model/view-types";
+import { type ChecklistFormState, ROLE_TO_REVIEW_STEP } from "../../model/view-types";
+
+interface ChecklistTaskPanelProps {
+  selectedReviewStep: ReviewStepCode;
+  selectedRows: CklstRvwRsltTreeDto[];
+  allRows: CklstRvwRsltTreeDto[];
+  formState: ChecklistFormState;
+  setFormState: Dispatch<SetStateAction<ChecklistFormState>>;
+  userRoleCode?: string;
+}
+
+function ChecklistTaskPanel({
+  selectedReviewStep,
+  selectedRows,
+  allRows,
+  formState,
+  setFormState,
+  userRoleCode,
+}: ChecklistTaskPanelProps) {
+  const currentUserReviewStep = userRoleCode ? ROLE_TO_REVIEW_STEP[userRoleCode] : undefined;
+  const isStepEditable = currentUserReviewStep === selectedReviewStep;
+
+  function handleSelectAll(value: "Y" | "N") {
+    if (!isStepEditable) return;
+    setFormState((prev) => {
+      const nextResults = { ...prev.results };
+      selectedRows
+        .filter((row) => row.bchckUseYn === "Y")
+        .forEach((row) => {
+          nextResults[buildChecklistRowKey(row, selectedReviewStep)] = value;
+        });
+      return patchChecklistFormState(prev, { results: nextResults }, allRows, selectedReviewStep);
+    });
+  }
+
+  return (
+    <div className="overflow-x-auto">
+      <Table variant="secondary">
+        <TableHeader>
+          <TableRow>
+            <TableHead className="w-[20rem]" rowSpan={2}>
+              검토항목
+            </TableHead>
+            <TableHead rowSpan={2}>주요 검토내용</TableHead>
+            <TableHead colSpan={2}>검토 결과</TableHead>
+            {selectedReviewStep !== "LOCAL" ? (
+              <TableHead rowSpan={2} className="w-[20rem]">
+                기술검토 의견
+              </TableHead>
+            ) : null}
+          </TableRow>
+          <TableRow>
+            <TableHead className="w-[12rem]">
+              <Button
+                type="button"
+                size="sm"
+                color="white"
+                disabled={!isStepEditable}
+                onClick={() => handleSelectAll("Y")}
+              >
+                전체 예
+              </Button>
+            </TableHead>
+            <TableHead className="w-[12rem]">
+              <Button
+                type="button"
+                size="sm"
+                color="gray"
+                disabled={!isStepEditable}
+                onClick={() => handleSelectAll("N")}
+              >
+                전체 아니오
+              </Button>
+            </TableHead>
+          </TableRow>
+        </TableHeader>
+        <TableBody>
+          {selectedRows.length === 0 ? (
+            <TableRow>
+              <TableCell colSpan={5} className="py-12 text-center text-muted-foreground">
+                조회된 체크리스트 항목이 없습니다.
+              </TableCell>
+            </TableRow>
+          ) : (
+            selectedRows.map((row) => {
+              const key = buildChecklistRowKey(row, selectedReviewStep);
+              const isFieldVisible = row.bchckUseYn === "Y";
+              const isLocalReviewStep = selectedReviewStep === "LOCAL";
+
+              return (
+                <TableRow key={key}>
+                  <TableCell className="text-center text-[1.2rem]">{row.cklstArtclNm}</TableCell>
+                  <TableCell
+                    className="pl-2 !text-left text-[1.2rem] text-gray-600"
+                    style={{ paddingLeft: `${Math.max(0, row.treeLevel - 1) * 16 + 8}px` }}
+                    colSpan={isFieldVisible ? 0 : isLocalReviewStep ? 3 : 4}
+                  >
+                    {row.rvwCn}
+                  </TableCell>
+                  {isFieldVisible && (
+                    <>
+                      <TableCell className="text-center">
+                        <input
+                          type="radio"
+                          name={`chk_${key}`}
+                          value="Y"
+                          checked={formState.results[key] === "Y"}
+                          readOnly={!isStepEditable}
+                          onChange={() => {
+                            if (!isStepEditable) return;
+                            setFormState((prev) =>
+                              patchChecklistFormState(
+                                prev,
+                                { results: { ...prev.results, [key]: "Y" } },
+                                allRows,
+                                selectedReviewStep,
+                              ),
+                            );
+                          }}
+                          className={cn(isStepEditable ? "cursor-pointer" : "cursor-not-allowed")}
+                        />
+                      </TableCell>
+                      <TableCell className="text-center">
+                        <input
+                          type="radio"
+                          name={`chk_${key}`}
+                          value="N"
+                          checked={formState.results[key] === "N"}
+                          readOnly={!isStepEditable}
+                          onChange={() => {
+                            if (!isStepEditable) return;
+                            setFormState((prev) =>
+                              patchChecklistFormState(
+                                prev,
+                                { results: { ...prev.results, [key]: "N" } },
+                                allRows,
+                                selectedReviewStep,
+                              ),
+                            );
+                          }}
+                          className={cn(isStepEditable ? "cursor-pointer" : "cursor-not-allowed")}
+                        />
+                      </TableCell>
+                    </>
+                  )}
+                  {!isLocalReviewStep && isFieldVisible && (
+                    <TableCell className="text-left">
+                      <Textarea
+                        className={cn(
+                          "min-h-[6rem] w-[32rem] !text-xl",
+                          isStepEditable ? "cursor-pointer" : "cursor-not-allowed",
+                        )}
+                        value={formState.comments[key] ?? ""}
+                        readOnly={!isStepEditable}
+                        onChange={(event) => {
+                          if (!isStepEditable) return;
+                          setFormState((prev) =>
+                            patchChecklistFormState(
+                              prev,
+                              { comments: { ...prev.comments, [key]: event.target.value } },
+                              allRows,
+                              selectedReviewStep,
+                            ),
+                          );
+                        }}
+                      />
+                    </TableCell>
+                  )}
+                </TableRow>
+              );
+            })
+          )}
+        </TableBody>
+      </Table>
+    </div>
+  );
+}
+
+export { ChecklistTaskPanel };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx
new file mode 100644
index 000000000..b2e5fec40
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx
@@ -0,0 +1,550 @@
+"use client";
+
+import { useMemo, useState } from "react";
+import { useRouter } from "next/navigation";
+
+import { useConfirm } from "@frontend-opensource/use-react-hooks";
+import { type QueryClient, useQueryClient } from "@tanstack/react-query";
+import { AxiosError } from "axios";
+
+import { ENDPOINT } from "@/shared/config";
+import { useAlertStore, useUserStore } from "@/shared/lib";
+import {
+  buildElaprPrgrsSttsListFromAplnRows,
+  ElaprApprovalDialog,
+  type ElaprDmndSaveRequestDto,
+  elaprDmndService,
+  type ElaprTmpltPickerConfirmPayload,
+  ElaprTmpltPickerDialog,
+  hasCurrentUserPendingApprovalRequest,
+  useElaprDocPrgrsByDocNo,
+} from "@/entities/elapr";
+import { instlSncnService } from "@/entities/instl-sncn";
+import {
+  type SewerBscPlanApplySaveRequestDto,
+  sewerBscPlanBaseKey,
+  type SewerBscPlanDetResponseDto,
+  sewerBscPlanService,
+} from "@/entities/sewer-bsc-plan";
+import { SplmntDmndDialog, type SplmntDmndDialogConfirmPayload } from "@/widgets/pbadms-sprt";
+import { Button } from "@common/components";
+
+import {
+  getButtonConfigs,
+  needsRoleUser01AtrzResolve,
+  SEWER_BSC_PLAN_VIEW_BUTTON_ACTION,
+  type SewerBscPlanViewButtonAction,
+} from "../../lib/button-config";
+import { computeReviewStepChecklistProgress } from "../../lib/checklist-utils";
+import {
+  buildSavePayload,
+  buildSupplementReqPayload,
+  buildTechReviewReplyPayload,
+  toSplmntDmndSaveItem,
+} from "../../lib/payload-utils";
+import { type ChecklistFormState } from "../../model/view-types";
+import type { TechReviewOpinionSectionHandle } from "../sections/tech-review-opinion-section";
+
+interface FloatingActionButtonsProps {
+  data: SewerBscPlanDetResponseDto;
+  docSeComCd: string;
+  sewerBscPlanDocNo: string;
+  chgCycl: number;
+  prgrsSttsComCd: string;
+  dtlInstCd: string | undefined;
+  atrzSeComCdList: string[];
+  isRvwLoginUserLoading: boolean;
+  checklistFormState: ChecklistFormState;
+  techReviewOpinionRef?: React.RefObject<TechReviewOpinionSectionHandle | null>;
+  opnrNm?: string;
+}
+
+type ActiveDialog = "elaprTmplt" | "dmndSplmnt" | "elaprApproval" | null;
+
+function FloatingActionButtons({
+  data,
+  docSeComCd,
+  sewerBscPlanDocNo,
+  chgCycl,
+  prgrsSttsComCd,
+  dtlInstCd,
+  atrzSeComCdList,
+  isRvwLoginUserLoading,
+  checklistFormState,
+  techReviewOpinionRef,
+  opnrNm,
+}: FloatingActionButtonsProps) {
+  const router = useRouter();
+  const { confirm } = useConfirm();
+  const queryClient = useQueryClient();
+  const userInfo = useUserStore((state) => state.userInfo);
+  const alert = useAlertStore((state) => state.setMessage);
+  const [isProcessing, setIsProcessing] = useState(false);
+  const [activeDialog, setActiveDialog] = useState<ActiveDialog>(null);
+
+  const docNo = data.detDto?.sewerBscPlanDocNo ?? sewerBscPlanDocNo;
+  const isRegister = data.detDto?.rgtr === userInfo?.userUnqId;
+
+  const needsAtrzResolve = needsRoleUser01AtrzResolve(dtlInstCd, prgrsSttsComCd);
+  const needsTeApprovalCheck = needsAtrzResolve && prgrsSttsComCd === "TE";
+  const { data: elaprDocPrgrsList = [], isLoading: isElaprDocPrgrsLoading } =
+    useElaprDocPrgrsByDocNo(needsTeApprovalCheck ? docNo : null);
+
+  const hasPendingApprovalRequest = hasCurrentUserPendingApprovalRequest(
+    elaprDocPrgrsList,
+    userInfo?.userUnqId,
+  );
+
+  const actionButtons = useMemo(() => {
+    if (needsAtrzResolve && isRvwLoginUserLoading) return [];
+    if (needsTeApprovalCheck && isElaprDocPrgrsLoading) return [];
+    return getButtonConfigs(dtlInstCd, prgrsSttsComCd, atrzSeComCdList, {
+      hasPendingApprovalRequest: needsTeApprovalCheck ? hasPendingApprovalRequest : undefined,
+    });
+  }, [
+    atrzSeComCdList,
+    dtlInstCd,
+    hasPendingApprovalRequest,
+    isElaprDocPrgrsLoading,
+    isRvwLoginUserLoading,
+    needsAtrzResolve,
+    needsTeApprovalCheck,
+    prgrsSttsComCd,
+  ]);
+
+  const canEdit =
+    isRegister && actionButtons.some((button) => button === SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.strg);
+
+  function handleGoToList() {
+    router.push("/sewer-bsc-plan");
+  }
+
+  function handleEdit() {
+    router.push(`/sewer-bsc-plan/${sewerBscPlanDocNo}/edit?chgCycl=${chgCycl}`);
+  }
+
+  function shouldShowButton(action: SewerBscPlanViewButtonAction) {
+    return actionButtons.some((button) => button === action);
+  }
+
+  async function invalidateDetail() {
+    await queryClient.invalidateQueries({
+      queryKey: [...sewerBscPlanBaseKey, "findDetails", sewerBscPlanDocNo, chgCycl],
+    });
+    await queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+  }
+
+  async function executeAction({
+    action,
+    request,
+    successMessage,
+  }: {
+    action: SewerBscPlanViewButtonAction;
+    request?: unknown;
+    successMessage?: string;
+  }) {
+    const handler = buttonActionHandlers[action];
+    if (!handler) return;
+
+    setIsProcessing(true);
+    try {
+      await handler({
+        request,
+        data,
+        chgCycl,
+        router,
+        queryClient,
+        onSuccess: () => {
+          if (successMessage) alert(successMessage);
+          void invalidateDetail();
+        },
+        onError: (error) => {
+          let errorMessage = "";
+          if (error instanceof AxiosError) {
+            errorMessage = error.response?.data?.message ?? "";
+          } else {
+            errorMessage = error.message ?? "처리 중 오류가 발생했습니다.";
+          }
+          alert(errorMessage);
+        },
+      });
+    } finally {
+      setIsProcessing(false);
+    }
+  }
+
+  async function handleStrgClick() {
+    const payload = buildSavePayload(data, checklistFormState, "LOCAL", "SV");
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.strg,
+      request: payload,
+      successMessage: "저장되었습니다.",
+    });
+  }
+
+  async function handleAplyClick() {
+    const { percent } = computeReviewStepChecklistProgress(
+      data.cklstResultRows ?? [],
+      checklistFormState.results,
+      "LOCAL",
+    );
+    const payload = buildSavePayload(data, checklistFormState, "LOCAL", "LE");
+
+    if (percent !== 100) {
+      alert("모든 체크리스트 항목을 체크해야 신청이 가능합니다.");
+      return;
+    }
+
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.aply,
+      request: payload,
+      successMessage: "신청 완료되었습니다.",
+    });
+  }
+
+  async function handleDelClick() {
+    if (!(await confirm("삭제하시겠습니까?"))) return;
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.del,
+      successMessage: "삭제되었습니다.",
+    });
+    router.push("/sewer-bsc-plan");
+  }
+
+  function getReviewOpinionFormData() {
+    return techReviewOpinionRef?.current?.getFormData() ?? null;
+  }
+
+  async function handleRvwRplyClick() {
+    const { percent } = computeReviewStepChecklistProgress(
+      data.cklstResultRows ?? [],
+      checklistFormState.results,
+      "ENV",
+    );
+
+    if (percent !== 100) {
+      alert("모든 체크리스트 항목을 체크해야 검토결과 회신이 가능합니다.");
+      return;
+    }
+
+    const payload = buildTechReviewReplyPayload(
+      data,
+      checklistFormState,
+      "ENV",
+      "EP",
+      "CP",
+      getReviewOpinionFormData(),
+      opnrNm,
+    );
+
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwRply,
+      request: payload,
+      successMessage: "검토결과 회신이 완료되었습니다.",
+    });
+    techReviewOpinionRef?.current?.resetForm();
+  }
+
+  async function handleRqstTechRvwClick() {
+    const payload = buildSavePayload(data, checklistFormState, "LOCAL", "ER");
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rqstTechRvw,
+      request: payload,
+      successMessage: "기술검토 의뢰가 완료되었습니다.",
+    });
+  }
+
+  async function handleElaprTmpltConfirm({ aplnRows }: ElaprTmpltPickerConfirmPayload) {
+    const payload: ElaprDmndSaveRequestDto = {
+      elaprDocNo: docNo,
+      dmndTtl: data.detDto?.sewerBscPlanNm ?? "",
+      dmndCn: data.activeDtlDto?.bizOtlnCn ?? "",
+      elaprPrgrsSttsList: buildElaprPrgrsSttsListFromAplnRows(aplnRows),
+    };
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dsgntRvwr,
+      request: payload,
+      successMessage: "검토자가 지정되었습니다.",
+    });
+    await queryClient.invalidateQueries({
+      queryKey: [ENDPOINT.AS_ELAPR_SERVICE.ELAPR_DMND, "findDocPrgrsByDocNo", docNo],
+    });
+  }
+
+  async function handleRvwStrgClick() {
+    const payload = buildTechReviewReplyPayload(
+      data,
+      checklistFormState,
+      "KECO",
+      "TE",
+      "SV",
+      getReviewOpinionFormData(),
+      opnrNm,
+    );
+
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwStrg,
+      request: payload,
+      successMessage: "저장되었습니다.",
+    });
+    techReviewOpinionRef?.current?.resetForm();
+  }
+
+  async function handleRvwCmptnClick() {
+    const { percent } = computeReviewStepChecklistProgress(
+      data.cklstResultRows ?? [],
+      checklistFormState.results,
+      "KECO",
+    );
+
+    if (percent !== 100) {
+      alert("모든 체크리스트 항목을 체크해야 검토완료가 가능합니다.");
+      return;
+    }
+
+    const payload = {
+      ...buildTechReviewReplyPayload(
+        data,
+        checklistFormState,
+        "KECO",
+        "TE",
+        "SV",
+        getReviewOpinionFormData(),
+        opnrNm,
+      ),
+      splmntDmndList: (data.splmntDmndList ?? []).map(toSplmntDmndSaveItem),
+    };
+
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwCmptn,
+      request: payload,
+    });
+    techReviewOpinionRef?.current?.resetForm();
+    setActiveDialog("elaprApproval");
+  }
+
+  function handleDmndSplmntClick() {
+    setActiveDialog("dmndSplmnt");
+  }
+
+  async function handleDmndSplmntConfirm(payload: SplmntDmndDialogConfirmPayload) {
+    setActiveDialog(null);
+    const requestPayload = buildSupplementReqPayload(data, payload, checklistFormState);
+    await executeAction({
+      action: SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dmndSplmnt,
+      request: requestPayload,
+      successMessage: "보완요청이 처리되었습니다.",
+    });
+  }
+
+  return (
+    <>
+      <div className="sticky bottom-0 z-40 !-mb-2 border-t bg-white pb-8 pt-6 shadow-[0_-4px_12px_rgba(0,0,0,0.06)]">
+        <div className="mx-4 flex flex-wrap justify-center gap-3 sm:gap-4">
+          <Button color="white" type="button" onClick={handleGoToList} disabled={isProcessing}>
+            목록
+          </Button>
+          {canEdit && (
+            <Button color="gray" onClick={handleEdit} disabled={isProcessing}>
+              수정
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.strg) && (
+            <Button onClick={handleStrgClick} disabled={isProcessing}>
+              저장
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.aply) && (
+            <Button color="green" onClick={handleAplyClick} disabled={isProcessing}>
+              신청완료
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.del) && (
+            <Button color="red" onClick={handleDelClick} disabled={isProcessing}>
+              삭제
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwRply) && (
+            <Button color="green" onClick={handleRvwRplyClick} disabled={isProcessing}>
+              검토결과 회신
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rqstTechRvw) && (
+            <Button onClick={handleRqstTechRvwClick} disabled={isProcessing}>
+              기술검토 의뢰
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dsgntRvwr) && (
+            <Button onClick={() => setActiveDialog("elaprTmplt")} disabled={isProcessing}>
+              검토자지정
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwStrg) && (
+            <Button onClick={handleRvwStrgClick} disabled={isProcessing}>
+              저장
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.rvwCmptn) && (
+            <Button color="green" onClick={handleRvwCmptnClick} disabled={isProcessing}>
+              검토완료
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.dmndSplmnt) && (
+            <Button color="gray" onClick={handleDmndSplmntClick} disabled={isProcessing}>
+              보완요청
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.atrzAprv) && (
+            <Button onClick={() => setActiveDialog("elaprApproval")} disabled={isProcessing}>
+              결재(승인)
+            </Button>
+          )}
+          {shouldShowButton(SEWER_BSC_PLAN_VIEW_BUTTON_ACTION.atrzRply) && (
+            <Button onClick={() => setActiveDialog("elaprApproval")} disabled={isProcessing}>
+              결재(회신)
+            </Button>
+          )}
+        </div>
+      </div>
+
+      <ElaprTmpltPickerDialog
+        open={activeDialog === "elaprTmplt"}
+        onClose={() => setActiveDialog(null)}
+        docSeComCd={docSeComCd}
+        onConfirm={handleElaprTmpltConfirm}
+      />
+
+      <SplmntDmndDialog
+        splmntArtclUpCd="SEWERSPLMNTARTCL"
+        open={activeDialog === "dmndSplmnt"}
+        onOpenChange={() => setActiveDialog(null)}
+        isSubmitting={isProcessing}
+        onConfirm={handleDmndSplmntConfirm}
+      />
+
+      <ElaprApprovalDialog
+        open={activeDialog === "elaprApproval"}
+        onOpenChange={(open) => setActiveDialog(open ? "elaprApproval" : null)}
+        elaprDocNo={docNo}
+        currentUserUuid={userInfo?.userUnqId ?? ""}
+        onSuccess={() => {
+          void invalidateDetail();
+        }}
+      />
+    </>
+  );
+}
+
+export { FloatingActionButtons };
+
+async function handleSaveApply(
+  context: ActionHandlerContext<SewerBscPlanApplySaveRequestDto>,
+): Promise<void> {
+  try {
+    await sewerBscPlanService.saveApply(context.request);
+    context.onSuccess?.();
+  } catch (error) {
+    context.onError?.(error as Error);
+  }
+}
+
+async function handleDel(context: ActionHandlerContext): Promise<void> {
+  try {
+    await sewerBscPlanService.delete(context.data.detDto?.sewerBscPlanDocNo ?? "");
+    context.onSuccess?.();
+  } catch (error) {
+    context.onError?.(error as Error);
+  }
+}
+
+async function handleTechReview(
+  context: ActionHandlerContext<SewerBscPlanApplySaveRequestDto>,
+): Promise<void> {
+  try {
+    await sewerBscPlanService.techReview(
+      context.data.detDto?.sewerBscPlanDocNo ?? "",
+      context.request,
+    );
+    context.onSuccess?.();
+  } catch (error) {
+    context.onError?.(error as Error);
+  }
+}
+
+async function handleRequestTechReview(context: ActionHandlerContext): Promise<void> {
+  try {
+    await instlSncnService.changePrgrsSttsComCd({
+      docNo: context.data.detDto?.sewerBscPlanDocNo ?? "",
+      docSeComCd: "SEWER",
+      prgrsSttsComCd: "ER",
+    });
+    context.onSuccess?.();
+  } catch (error) {
+    context.onError?.(error as Error);
+  }
+}
+
+async function handleDsgntRvwr(
+  context: ActionHandlerContext<ElaprDmndSaveRequestDto>,
+): Promise<void> {
+  try {
+    await elaprDmndService.save(context.request);
+    context.onSuccess?.();
+  } catch (error) {
+    context.onError?.(error as Error);
+  }
+}
+
+async function handleDmndSplmnt(
+  context: ActionHandlerContext<SewerBscPlanApplySaveRequestDto>,
+): Promise<void> {
+  try {
+    const docNo = context.data.detDto?.sewerBscPlanDocNo;
+    if (!docNo) throw new Error("문서번호가 없습니다.");
+    const result = await sewerBscPlanService.submitReqSupplement(
+      docNo,
+      context.chgCycl,
+      context.request,
+    );
+    await context.queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+    context.router.replace(`/sewer-bsc-plan/${result.sewerBscPlanDocNo}?chgCycl=${result.chgCycl}`);
+    context.onSuccess?.();
+  } catch (error) {
+    context.onError?.(error as Error);
+  }
+}
+
+async function handleAtrzAprv(context: ActionHandlerContext): Promise<void> {
+  context.onSuccess?.();
+}
+
+async function handleAtrzRply(context: ActionHandlerContext): Promise<void> {
+  context.onSuccess?.();
+}
+
+const buttonActionHandlers: Record<SewerBscPlanViewButtonAction, ActionHandler> = {
+  strg: handleSaveApply,
+  aply: handleSaveApply,
+  del: handleDel,
+  rvwRply: handleTechReview,
+  rqstTechRvw: handleRequestTechReview,
+  dsgntRvwr: handleDsgntRvwr,
+  rvwStrg: handleTechReview,
+  rvwCmptn: handleTechReview,
+  dmndSplmnt: handleDmndSplmnt,
+  atrzAprv: handleAtrzAprv,
+  atrzRply: handleAtrzRply,
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+interface ActionHandlerContext<T = any> {
+  request: T;
+  data: SewerBscPlanDetResponseDto;
+  chgCycl: number;
+  router: ReturnType<typeof useRouter>;
+  queryClient: QueryClient;
+  onSuccess?: () => void;
+  onError?: (error: Error) => void;
+}
+
+type ActionHandler = (context: ActionHandlerContext) => Promise<void>;
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/previous-plan-lookup-dialog.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/previous-plan-lookup-dialog.tsx
index 843f0251b..162efec34 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/previous-plan-lookup-dialog.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/previous-plan-lookup-dialog.tsx
@@ -33,7 +33,7 @@ interface PreviousPlanLookupDialogProps {
   /** 부모 폼 `sewerBscPlan.sido` 표시명 */
   initialSidoNm?: string;
   /** 부모 폼 `sewerBscPlan.gugun` 표시명 */
-  initialGugunNm?: string;
+  initialGugunNm?: string | null;
 }
 
 const EMPTY_ADST_LIST: CmCdAdstDstrComboResponseDto[] = [];
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/attachments-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/attachments-section.tsx
new file mode 100644
index 000000000..f35cab5ff
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/attachments-section.tsx
@@ -0,0 +1,127 @@
+"use client";
+
+import { Paperclip } from "lucide-react";
+
+import { formatFileSize } from "@/shared/lib/file-utils";
+import { useDownloadAttachmentByAtflCd } from "@/entities/attach";
+import type {
+  AtflMngClientResponseDto,
+  EsntlAtchFileMngTreeResponseDto,
+} from "@/entities/sewer-bsc-plan";
+import { SectionCollapsible } from "@/widgets/pbadms-sprt";
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@common/components";
+
+interface AttachmentsSectionProps {
+  esntlFileList: EsntlAtchFileMngTreeResponseDto[];
+  etcFileList: AtflMngClientResponseDto[];
+}
+
+function AttachmentsSection({ esntlFileList, etcFileList }: AttachmentsSectionProps) {
+  const { mutate: downloadAttachment } = useDownloadAttachmentByAtflCd();
+
+  return (
+    <>
+      {esntlFileList.length > 0 && (
+        <SectionCollapsible title="필수 첨부파일">
+          <div className="overflow-x-auto">
+            <Table variant="secondary">
+              <TableHeader>
+                <TableRow>
+                  <TableHead>필수 자료명</TableHead>
+                  <TableHead>파일명</TableHead>
+                  <TableHead className="w-[8rem] text-right">크기</TableHead>
+                </TableRow>
+              </TableHeader>
+              <TableBody>
+                {esntlFileList.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={3} className="py-12 text-center text-muted-foreground">
+                      조회된 필수 첨부파일 항목이 없습니다.
+                    </TableCell>
+                  </TableRow>
+                ) : (
+                  esntlFileList.map((file) => (
+                    <TableRow key={file.esntlAtchFileId}>
+                      <TableCell className="pl-2 text-left">
+                        {file.esntlAtchFileNm}
+                        {file.esntlAtchYn === "Y" ? (
+                          <span className="ml-1 text-red-500">*</span>
+                        ) : null}
+                      </TableCell>
+                      <TableCell className="text-left">
+                        {file.atflCd ? (
+                          <a
+                            className="inline-flex cursor-pointer items-center gap-1 text-blue-600 hover:underline"
+                            onClick={() => downloadAttachment(file.atflCd ?? "")}
+                            target="_blank"
+                            rel="noreferrer"
+                          >
+                            <Paperclip className="size-5 shrink-0" />
+                            {file.orgnlFileNm || "다운로드"}
+                          </a>
+                        ) : (
+                          <span className="text-gray-500">첨부없음</span>
+                        )}
+                      </TableCell>
+                      <TableCell className="text-right">
+                        {formatFileSize(file.atflFlieSz)}
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </div>
+        </SectionCollapsible>
+      )}
+
+      {etcFileList.length > 0 && (
+        <SectionCollapsible title="기타 첨부파일">
+          <div className="overflow-x-auto">
+            <Table variant="secondary">
+              <TableHeader>
+                <TableRow>
+                  <TableHead>파일명</TableHead>
+                  <TableHead className="w-[8rem] text-right">크기</TableHead>
+                </TableRow>
+              </TableHeader>
+              <TableBody>
+                {etcFileList.length === 0 ? (
+                  <TableRow>
+                    <TableCell colSpan={2} className="py-12 text-center text-muted-foreground">
+                      등록된 기타첨부파일이 없습니다.
+                    </TableCell>
+                  </TableRow>
+                ) : (
+                  etcFileList.map((file) => (
+                    <TableRow key={file.atflId}>
+                      <TableCell className="text-left">
+                        {file.atflCd ? (
+                          <a
+                            className="cursor-pointer text-blue-600 hover:underline"
+                            onClick={() => downloadAttachment(file.atflCd)}
+                            target="_blank"
+                            rel="noreferrer"
+                          >
+                            {file.orgnlFileNm || file.physFileNm || file.atflId}
+                          </a>
+                        ) : (
+                          <span>{file.orgnlFileNm || file.physFileNm || file.atflId}</span>
+                        )}
+                      </TableCell>
+                      <TableCell className="text-right text-gray-500">
+                        {formatFileSize(file.atflFlieSz)}
+                      </TableCell>
+                    </TableRow>
+                  ))
+                )}
+              </TableBody>
+            </Table>
+          </div>
+        </SectionCollapsible>
+      )}
+    </>
+  );
+}
+
+export { AttachmentsSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/basic-info-form-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/basic-info-form-section.tsx
index c935b9185..1af5a02b1 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/sections/basic-info-form-section.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/basic-info-form-section.tsx
@@ -2,6 +2,7 @@
 
 import { Controller, useFormContext } from "react-hook-form";
 
+import { useUserStore } from "@/shared/lib";
 import { Field, FieldError } from "@/shared/ui/field";
 import { SectionCollapsible } from "@/widgets/pbadms-sprt";
 import {
@@ -23,6 +24,7 @@ import type { SewerBscPlanRegistFormData } from "../../lib/sewer-bsc-plan-regist
 import { getGoalYearOptions, getLinkedGoalYears, getPlanYearOptions } from "../../lib/year-options";
 
 function BasicInfoFormSection() {
+  const userInfo = useUserStore((state) => state.userInfo);
   const { control, setValue, watch } = useFormContext<SewerBscPlanRegistFormData>();
   const planYearOptions = getPlanYearOptions();
   const goalYearOptions = getGoalYearOptions();
@@ -265,7 +267,7 @@ function BasicInfoFormSection() {
             <TableHead>구분</TableHead>
             <TableCell>{sewerBscPlanSeLabel}</TableCell>
             <TableHead>신청 지자체</TableHead>
-            <TableCell>{localGovLabel}</TableCell>
+            <TableCell>{localGovLabel || userInfo?.laeSeNm}</TableCell>
           </TableRow>
         </TableHeader>
       </Table>
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/basic-info-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/basic-info-section.tsx
new file mode 100644
index 000000000..3cfd3e4a9
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/basic-info-section.tsx
@@ -0,0 +1,69 @@
+"use client";
+
+import type {
+  SewerBscPlanDtlResponseDto,
+  SewerBscPlanResponseDto,
+} from "@/entities/sewer-bsc-plan";
+import { SectionCollapsible } from "@/widgets/pbadms-sprt";
+import { Table, TableCell, TableHead, TableHeader, TableRow } from "@common/components";
+
+interface BasicInfoSectionProps {
+  det: SewerBscPlanResponseDto;
+  dtl?: SewerBscPlanDtlResponseDto;
+}
+
+function BasicInfoSection({ det, dtl }: BasicInfoSectionProps) {
+  const sewerBscPlanSeLabel = [det.sewerBscPlanSeCdNm, det.taskSeCdNm].filter(Boolean).join(" ");
+  const localGovLabel = [det.sido, det.gugun].filter(Boolean).join(" ");
+
+  return (
+    <SectionCollapsible title="기본계획 신청">
+      <Table variant="secondary">
+        <colgroup>
+          <col width="15%" />
+          <col width="35%" />
+          <col width="15%" />
+          <col width="35%" />
+        </colgroup>
+        <TableHeader>
+          <TableRow>
+            <TableHead>기본계획명</TableHead>
+            <TableCell colSpan={3}>{det.sewerBscPlanNm || "-"}</TableCell>
+          </TableRow>
+          <TableRow>
+            <TableHead>계획년도</TableHead>
+            <TableCell>{dtl?.planYr || "-"}</TableCell>
+            <TableHead>기준년도</TableHead>
+            <TableCell>{dtl?.crtrYr || "-"}</TableCell>
+          </TableRow>
+          <TableRow>
+            <TableHead>1단계 목표연도</TableHead>
+            <TableCell>{dtl?.frlvlGoalYr || "-"}</TableCell>
+            <TableHead>2단계 목표연도</TableHead>
+            <TableCell>{dtl?.sclvlGoalYr || "-"}</TableCell>
+          </TableRow>
+          <TableRow>
+            <TableHead>3단계 목표연도</TableHead>
+            <TableCell>{dtl?.thlvlGoalYr || "-"}</TableCell>
+            <TableHead>4단계 목표연도</TableHead>
+            <TableCell>{dtl?.folvlGoalYr || "-"}</TableCell>
+          </TableRow>
+          <TableRow>
+            <TableHead>계획개요</TableHead>
+            <TableCell colSpan={3} className="whitespace-pre-wrap">
+              {dtl?.bizOtlnCn || "-"}
+            </TableCell>
+          </TableRow>
+          <TableRow>
+            <TableHead>구분</TableHead>
+            <TableCell>{sewerBscPlanSeLabel || "-"}</TableCell>
+            <TableHead>신청 지자체</TableHead>
+            <TableCell>{localGovLabel || "-"}</TableCell>
+          </TableRow>
+        </TableHeader>
+      </Table>
+    </SectionCollapsible>
+  );
+}
+
+export { BasicInfoSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/biz-cst-matrix-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/biz-cst-matrix-section.tsx
new file mode 100644
index 000000000..ae224238d
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/biz-cst-matrix-section.tsx
@@ -0,0 +1,114 @@
+"use client";
+
+import { useMemo } from "react";
+
+import { useAcntgSeMngTree } from "@/entities/acntg";
+import type {
+  SewerBscPlanBizCstResponseDto,
+  SewerBscPlanDtlResponseDto,
+} from "@/entities/sewer-bsc-plan";
+import { buildAcntgCostItems, fmtNumber, SectionCollapsible } from "@/widgets/pbadms-sprt";
+import {
+  Skeleton,
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+} from "@common/components";
+
+import { getAmt } from "../../lib/biz-cst-matrix-utils";
+
+interface BizCstMatrixSectionProps {
+  bizCstList: SewerBscPlanBizCstResponseDto[];
+  dtl?: SewerBscPlanDtlResponseDto;
+}
+
+function BizCstMatrixSection({ bizCstList, dtl }: BizCstMatrixSectionProps) {
+  const { data: acntgTree = [] } = useAcntgSeMngTree();
+  const costItems = useMemo(() => buildAcntgCostItems(acntgTree), [acntgTree]);
+
+  const matrixList = useMemo(
+    () =>
+      bizCstList.map((item) => ({
+        planStpNo: item.planStpNo ?? 1,
+        acntgSeCd: item.acntgSeCd ?? "",
+        cstrnAmt: item.cstrnAmt ?? 0,
+      })),
+    [bizCstList],
+  );
+
+  const stepHeaders = [
+    { planStpNo: 1, label: "1단계", year: dtl?.frlvlGoalYr },
+    { planStpNo: 2, label: "2단계", year: dtl?.sclvlGoalYr },
+    { planStpNo: 3, label: "3단계", year: dtl?.thlvlGoalYr },
+    { planStpNo: 4, label: "4단계", year: dtl?.folvlGoalYr },
+  ];
+
+  if (costItems.length === 0) {
+    return (
+      <SectionCollapsible title="총사업비">
+        <div className="space-y-2 p-2">
+          <Skeleton className="h-[8rem] rounded-xl" />
+          <Skeleton className="h-[32rem] rounded-xl" />
+        </div>
+      </SectionCollapsible>
+    );
+  }
+
+  return (
+    <SectionCollapsible title="총사업비">
+      <div className="overflow-x-auto">
+        <p className="mb-2 text-right font-normal text-muted-foreground">(단위: 백만원)</p>
+        <Table variant="secondary" className="table-fixed">
+          <colgroup>
+            <col width="12%" />
+            <col width="22%" />
+            <col width="22%" />
+            <col width="22%" />
+            <col width="22%" />
+          </colgroup>
+          <TableHeader>
+            <TableRow>
+              <TableHead className="w-[28rem]">구분</TableHead>
+              {stepHeaders.map((step) => (
+                <TableHead key={step.planStpNo} className="text-center">
+                  {step.label}
+                  <br />
+                  <span className="font-normal text-muted-foreground">({step.year || "-"})</span>
+                </TableHead>
+              ))}
+            </TableRow>
+          </TableHeader>
+          <TableBody>
+            {costItems.map((item) => {
+              const paddingLeft = `${item.level * 1.6}rem`;
+              const showSubIcon = item.level >= 2;
+
+              return (
+                <TableRow key={item.code}>
+                  <TableHead className="text-left" style={{ paddingLeft }}>
+                    <div className="relative">
+                      {showSubIcon && (
+                        <span className="absolute -left-6 top-0 text-gray-400">└</span>
+                      )}
+                      {item.label}
+                    </div>
+                  </TableHead>
+                  {stepHeaders.map((step) => (
+                    <TableCell key={step.planStpNo} className="text-right">
+                      {fmtNumber(getAmt(matrixList, item.code, step.planStpNo))}
+                    </TableCell>
+                  ))}
+                </TableRow>
+              );
+            })}
+          </TableBody>
+        </Table>
+      </div>
+    </SectionCollapsible>
+  );
+}
+
+export { BizCstMatrixSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/checklist-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/checklist-section.tsx
new file mode 100644
index 000000000..9bb85272b
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/checklist-section.tsx
@@ -0,0 +1,141 @@
+"use client";
+
+import { type Dispatch, type SetStateAction, useEffect, useMemo, useState } from "react";
+
+import type { CklstRvwRsltTreeDto } from "@/entities/sewer-bsc-plan";
+import { SectionCollapsible } from "@/widgets/pbadms-sprt";
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@common/components";
+
+import {
+  computeReviewStepChecklistProgress,
+  extractTaskCodes,
+  getChecklistDisplayRows,
+} from "../../lib/checklist-utils";
+import { getVisibleReviewSteps } from "../../lib/review-step-utils";
+import type { ReviewStepCode } from "../../model/view-types";
+import {
+  type ChecklistFormState,
+  REVIEW_STEP_LABELS,
+  ROLE_TO_REVIEW_STEP,
+  TASK_CODE_LABELS,
+} from "../../model/view-types";
+import { ChecklistTaskPanel } from "../components/checklist-task-panel";
+
+interface ChecklistSectionProps {
+  cklstResultList: CklstRvwRsltTreeDto[];
+  prgrsSttsComCd: string;
+  userRoleCode?: string;
+  formState: ChecklistFormState;
+  setFormState: Dispatch<SetStateAction<ChecklistFormState>>;
+}
+
+function ChecklistSection({
+  cklstResultList,
+  prgrsSttsComCd,
+  userRoleCode,
+  formState,
+  setFormState,
+}: ChecklistSectionProps) {
+  const visibleReviewSteps = useMemo(
+    () => getVisibleReviewSteps(prgrsSttsComCd, userRoleCode),
+    [prgrsSttsComCd, userRoleCode],
+  );
+  const taskCodes = useMemo(() => extractTaskCodes(cklstResultList), [cklstResultList]);
+
+  const defaultReviewStep = ROLE_TO_REVIEW_STEP[userRoleCode ?? ""] ?? "LOCAL";
+  const [selectedReviewStep, setSelectedReviewStep] = useState<ReviewStepCode>(defaultReviewStep);
+  const [selectedTaskCode, setSelectedTaskCode] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (visibleReviewSteps.length === 0) return;
+    if (!visibleReviewSteps.includes(selectedReviewStep)) {
+      setSelectedReviewStep(visibleReviewSteps[visibleReviewSteps.length - 1]);
+    }
+  }, [selectedReviewStep, visibleReviewSteps]);
+
+  useEffect(() => {
+    if (taskCodes.length === 0) {
+      setSelectedTaskCode(null);
+      return;
+    }
+    if (!selectedTaskCode || !taskCodes.includes(selectedTaskCode)) {
+      setSelectedTaskCode(taskCodes[0]);
+    }
+  }, [taskCodes, selectedTaskCode]);
+
+  const progress = useMemo(
+    () =>
+      computeReviewStepChecklistProgress(cklstResultList, formState.results, selectedReviewStep),
+    [cklstResultList, formState.results, selectedReviewStep],
+  );
+
+  const { total, completed, percent } = progress;
+
+  if (cklstResultList.length === 0) {
+    return null;
+  }
+
+  return (
+    <SectionCollapsible title="체크리스트">
+      <div className="flex flex-col gap-4 p-2">
+        {visibleReviewSteps.length > 0 ? (
+          <Tabs
+            value={selectedReviewStep}
+            onValueChange={(value) => setSelectedReviewStep(value as ReviewStepCode)}
+            className="w-full"
+          >
+            <TabsList>
+              {visibleReviewSteps.map((stepCode) => (
+                <TabsTrigger key={stepCode} value={stepCode} className="!px-6 !py-3 text-xl">
+                  {REVIEW_STEP_LABELS[stepCode]}
+                </TabsTrigger>
+              ))}
+            </TabsList>
+          </Tabs>
+        ) : null}
+
+        {taskCodes.length > 0 ? (
+          <Tabs
+            value={selectedTaskCode ?? taskCodes[0]}
+            onValueChange={setSelectedTaskCode}
+            className="w-full"
+            variant="outline"
+          >
+            <div className="flex items-end justify-between gap-4">
+              <TabsList className="p-0">
+                {taskCodes.map((code) => (
+                  <TabsTrigger
+                    key={code}
+                    value={code}
+                    className="!px-6 !py-3 text-xl [&:after]:hidden"
+                  >
+                    {TASK_CODE_LABELS[code] ?? code}
+                  </TabsTrigger>
+                ))}
+              </TabsList>
+              <div className="shrink-0 pb-1 text-lg text-muted-foreground">
+                총합: <strong>{total}</strong> · 완료: <strong>{completed}</strong> · 진행률:{" "}
+                <strong>{percent}%</strong>
+              </div>
+            </div>
+
+            {taskCodes.map((code) => (
+              <TabsContent key={code} value={code} className="mt-0 border-0 p-0 shadow-none ring-0">
+                <ChecklistTaskPanel
+                  selectedReviewStep={selectedReviewStep}
+                  selectedRows={getChecklistDisplayRows(cklstResultList, code)}
+                  allRows={cklstResultList}
+                  formState={formState}
+                  setFormState={setFormState}
+                  userRoleCode={userRoleCode}
+                />
+              </TabsContent>
+            ))}
+          </Tabs>
+        ) : null}
+      </div>
+    </SectionCollapsible>
+  );
+}
+
+export { ChecklistSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/contact-info-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/contact-info-section.tsx
new file mode 100644
index 000000000..4abd171c1
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/contact-info-section.tsx
@@ -0,0 +1,58 @@
+"use client";
+
+import type { SewerBscPlanDtlResponseDto } from "@/entities/sewer-bsc-plan";
+import { SectionCollapsible } from "@/widgets/pbadms-sprt";
+import { Table, TableCell, TableHead, TableHeader, TableRow } from "@common/components";
+
+interface ContactInfoSectionProps {
+  dtl?: SewerBscPlanDtlResponseDto;
+}
+
+function ContactInfoSection({ dtl }: ContactInfoSectionProps) {
+  if (!dtl) return null;
+
+  return (
+    <SectionCollapsible title="담당자 정보">
+      <Table variant="secondary">
+        <TableHeader>
+          {dtl.aplcntNm ? (
+            <>
+              <TableRow>
+                <TableHead rowSpan={2}>신청자</TableHead>
+                <TableHead>이름</TableHead>
+                <TableCell>{dtl.aplcntNm || "-"}</TableCell>
+                <TableHead>연락처</TableHead>
+                <TableCell>{dtl.aplcntMblTelno || "-"}</TableCell>
+              </TableRow>
+              <TableRow>
+                <TableHead>소속</TableHead>
+                <TableCell>{dtl.aplcntOgdpNm || "-"}</TableCell>
+                <TableHead>이메일</TableHead>
+                <TableCell>{dtl.aplcntEmlAddr || "-"}</TableCell>
+              </TableRow>
+            </>
+          ) : null}
+          {dtl.dsgnrNm ? (
+            <>
+              <TableRow>
+                <TableHead rowSpan={2}>설계자</TableHead>
+                <TableHead>이름</TableHead>
+                <TableCell>{dtl.dsgnrNm || "-"}</TableCell>
+                <TableHead>연락처</TableHead>
+                <TableCell>{dtl.dsgnrTelno || "-"}</TableCell>
+              </TableRow>
+              <TableRow>
+                <TableHead>소속</TableHead>
+                <TableCell>{dtl.dsgnrOgdpNm || "-"}</TableCell>
+                <TableHead>이메일</TableHead>
+                <TableCell>{dtl.dsgnrEmlAddr || "-"}</TableCell>
+              </TableRow>
+            </>
+          ) : null}
+        </TableHeader>
+      </Table>
+    </SectionCollapsible>
+  );
+}
+
+export { ContactInfoSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/fnrs-cst-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/fnrs-cst-section.tsx
new file mode 100644
index 000000000..5ec099fda
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/fnrs-cst-section.tsx
@@ -0,0 +1,122 @@
+"use client";
+
+import { useMemo } from "react";
+
+import { useAcntgSeMngTree } from "@/entities/acntg";
+import type {
+  SewerBscPlanDtlResponseDto,
+  SewerBscPlanFnrsCstResponseDto,
+} from "@/entities/sewer-bsc-plan";
+import { buildAcntgCostItems, fmtNumber, SectionCollapsible } from "@/widgets/pbadms-sprt";
+import {
+  Skeleton,
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+} from "@common/components";
+
+import { PLAN_STEPS } from "../../lib/biz-cst-matrix-utils";
+
+interface FnrsCstSectionProps {
+  fnrsCstList: SewerBscPlanFnrsCstResponseDto[];
+  dtl?: SewerBscPlanDtlResponseDto;
+}
+
+const FNRS_CST_ROWS = [
+  { key: "sumAmt" as const, label: "총사업비" },
+  { key: "gvexpAmt" as const, label: "국고" },
+  { key: "lcexpAmt" as const, label: "지방비" },
+  { key: "orgprBdchgAmt" as const, label: "원인자부담금" },
+  { key: "etcAmt" as const, label: "기타" },
+];
+
+function FnrsCstSection({ fnrsCstList, dtl }: FnrsCstSectionProps) {
+  const { data: acntgTree = [] } = useAcntgSeMngTree();
+  const costItems = useMemo(() => buildAcntgCostItems(acntgTree), [acntgTree]);
+
+  const matrixFnrsList = useMemo(
+    () =>
+      PLAN_STEPS.map((planStpNo) => {
+        const item = fnrsCstList.find((row) => row.planStpNo === planStpNo);
+        return {
+          planStpNo,
+          gvexpAmt: item?.gvexpAmt ?? 0,
+          lcexpAmt: item?.lcexpAmt ?? 0,
+          orgprBdchgAmt: item?.orgprBdchgAmt ?? 0,
+          etcAmt: item?.etcAmt ?? 0,
+          sumAmt: item?.sumAmt ?? 0,
+        };
+      }),
+    [fnrsCstList],
+  );
+
+  const stepHeaders = [
+    { planStpNo: 1, label: "1단계", year: dtl?.frlvlGoalYr },
+    { planStpNo: 2, label: "2단계", year: dtl?.sclvlGoalYr },
+    { planStpNo: 3, label: "3단계", year: dtl?.thlvlGoalYr },
+    { planStpNo: 4, label: "4단계", year: dtl?.folvlGoalYr },
+  ];
+
+  if (costItems.length === 0) {
+    return (
+      <SectionCollapsible title="재원분담">
+        <div className="space-y-2 p-2">
+          <Skeleton className="h-[8rem] rounded-xl" />
+          <Skeleton className="h-[32rem] rounded-xl" />
+        </div>
+      </SectionCollapsible>
+    );
+  }
+
+  return (
+    <SectionCollapsible title="재원분담">
+      <div className="overflow-x-auto">
+        <div className="mb-2 flex items-center justify-between">
+          <h3 className="text-xl font-semibold">세부별 총사업비(①) - 재원분담 총사업비(②)</h3>
+          <span className="font-normal text-muted-foreground">(단위: 백만원)</span>
+        </div>
+        <Table variant="secondary" className="table-fixed">
+          <colgroup>
+            <col width="12%" />
+            <col width="22%" />
+            <col width="22%" />
+            <col width="22%" />
+            <col width="22%" />
+          </colgroup>
+          <TableHeader>
+            <TableRow>
+              <TableHead>구분</TableHead>
+              {stepHeaders.map((step) => (
+                <TableHead key={step.planStpNo} className="text-center">
+                  {step.label}
+                  <br />
+                  <span className="font-normal text-muted-foreground">({step.year || "-"})</span>
+                </TableHead>
+              ))}
+            </TableRow>
+          </TableHeader>
+          <TableBody>
+            {FNRS_CST_ROWS.map((row) => (
+              <TableRow key={row.key}>
+                <TableHead>{row.label}</TableHead>
+                {stepHeaders.map((step) => {
+                  const item = matrixFnrsList.find((fnrs) => fnrs.planStpNo === step.planStpNo);
+                  return (
+                    <TableCell key={step.planStpNo} className="text-right">
+                      {fmtNumber(item?.[row.key])}
+                    </TableCell>
+                  );
+                })}
+              </TableRow>
+            ))}
+          </TableBody>
+        </Table>
+      </div>
+    </SectionCollapsible>
+  );
+}
+
+export { FnrsCstSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/outline-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/outline-section.tsx
new file mode 100644
index 000000000..87f91fac9
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/outline-section.tsx
@@ -0,0 +1,71 @@
+"use client";
+
+import type {
+  SewerBscPlanDtlResponseDto,
+  SewerBscPlanOtlnResponseDto,
+} from "@/entities/sewer-bsc-plan";
+import { fmtNumber, SectionCollapsible } from "@/widgets/pbadms-sprt";
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@common/components";
+
+interface OutlineSectionProps {
+  otlnList: SewerBscPlanOtlnResponseDto[];
+  dtl?: SewerBscPlanDtlResponseDto;
+}
+
+const OTLN_ROWS = [
+  { key: "sewerPlanPpltnCnt" as const, label: "계획인구" },
+  { key: "sewerPrcsPpltnCnt" as const, label: "처리인구" },
+  { key: "sewerPsplyRt" as const, label: "하수도보급율" },
+];
+
+function OutlineSection({ otlnList, dtl }: OutlineSectionProps) {
+  const stepHeaders = [
+    { planStpNo: 1, label: "1단계", year: dtl?.frlvlGoalYr },
+    { planStpNo: 2, label: "2단계", year: dtl?.sclvlGoalYr },
+    { planStpNo: 3, label: "3단계", year: dtl?.thlvlGoalYr },
+    { planStpNo: 4, label: "4단계", year: dtl?.folvlGoalYr },
+  ];
+
+  return (
+    <SectionCollapsible title="사업개요">
+      <Table variant="secondary">
+        <colgroup>
+          <col width="12%" />
+          <col width="22%" />
+          <col width="22%" />
+          <col width="22%" />
+          <col width="22%" />
+        </colgroup>
+        <TableHeader>
+          <TableRow>
+            <TableHead className="w-[20rem]">구분</TableHead>
+            {stepHeaders.map((step) => (
+              <TableHead key={step.planStpNo} className="text-center">
+                {step.label}
+                <br />
+                <span className="font-normal text-muted-foreground">({step.year || "-"})</span>
+              </TableHead>
+            ))}
+          </TableRow>
+        </TableHeader>
+        <TableBody>
+          {OTLN_ROWS.map((row) => (
+            <TableRow key={row.key}>
+              <TableHead>{row.label}</TableHead>
+              {stepHeaders.map((step) => {
+                const item = otlnList.find((otln) => otln.planStpNo === step.planStpNo);
+                return (
+                  <TableCell key={step.planStpNo} className="text-right">
+                    {fmtNumber(item?.[row.key])}
+                  </TableCell>
+                );
+              })}
+            </TableRow>
+          ))}
+        </TableBody>
+      </Table>
+    </SectionCollapsible>
+  );
+}
+
+export { OutlineSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/tech-review-opinion-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/tech-review-opinion-section.tsx
new file mode 100644
index 000000000..cf8135717
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/tech-review-opinion-section.tsx
@@ -0,0 +1,365 @@
+"use client";
+
+import { forwardRef, useEffect, useImperativeHandle, useState } from "react";
+
+import { Paperclip } from "lucide-react";
+
+import { PROXY_HOST } from "@/shared/config";
+import { dayjs, getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
+import { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
+import { attachService } from "@/entities/attach";
+import type { SewerBscPlanRvwOpnnResponseDto } from "@/entities/sewer-bsc-plan";
+import { SectionCollapsible } from "@/widgets/pbadms-sprt";
+import {
+  Button,
+  RadioGroup,
+  RadioGroupItem,
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+  Textarea,
+} from "@common/components";
+
+import type {
+  ReviewOpinionFormData,
+  ReviewOpinionGetFormDataResult,
+} from "../../lib/review-opinion-utils";
+import type { ReviewStepCode } from "../../model/view-types";
+import { REVIEW_STEP_LABELS } from "../../model/view-types";
+
+const RVW_OPNN_FILE_KEY_PREFIX = "rvw-opnn::";
+
+interface TechReviewOpinionSectionProps {
+  rvwList: SewerBscPlanRvwOpnnResponseDto[];
+  editableReviewStep?: ReviewStepCode;
+  atrzSeComCdList?: string[];
+  isAtrzLoading?: boolean;
+}
+
+export interface TechReviewOpinionSectionHandle {
+  getFormData: () => ReviewOpinionGetFormDataResult | null;
+  resetForm: () => void;
+}
+
+interface TechReviewOpinionTableProps {
+  items: SewerBscPlanRvwOpnnResponseDto[];
+}
+
+interface UploadedOpinionFile {
+  fileName: string;
+  fileKey: string;
+  atflId?: string;
+  atflCd?: string;
+}
+
+const EMPTY_FORM_DATA: ReviewOpinionFormData = {
+  rvwRsltCn: "",
+  rvwRsltAnmlyYn: "",
+  atchFileGroupId: "",
+  opnrSeComCd: "",
+};
+
+function createRvwOpnnUploadKey(file: File) {
+  return `${RVW_OPNN_FILE_KEY_PREFIX}${getDefaultFileKey(file)}`;
+}
+
+function hasFormContent(formData: ReviewOpinionFormData) {
+  return Boolean(formData.rvwRsltCn.trim() || formData.rvwRsltAnmlyYn || formData.atchFileGroupId);
+}
+
+const TechReviewOpinionSection = forwardRef<
+  TechReviewOpinionSectionHandle,
+  TechReviewOpinionSectionProps
+>(function TechReviewOpinionSection(
+  { rvwList, editableReviewStep, atrzSeComCdList = [], isAtrzLoading = false },
+  ref,
+) {
+  const canWriteKecoOpinion = !isAtrzLoading && atrzSeComCdList.includes("ATRZ02");
+  const [formData, setFormData] = useState<ReviewOpinionFormData>({
+    ...EMPTY_FORM_DATA,
+    opnrSeComCd: editableReviewStep ?? "",
+  });
+  const [uploadedFile, setUploadedFile] = useState<UploadedOpinionFile | null>(null);
+
+  useEffect(() => {
+    setFormData((prev) => ({
+      ...prev,
+      opnrSeComCd: editableReviewStep ?? "",
+    }));
+  }, [editableReviewStep]);
+
+  const { uploadFileAsync, isUploading, uploads } = useTus({
+    onSuccess: (atflCd, atflId, _file, fileKey) => {
+      if (!atflCd || !atflId) return;
+
+      setFormData((prev) => ({ ...prev, atchFileGroupId: atflCd }));
+      setUploadedFile((prev) => (prev?.fileKey === fileKey ? { ...prev, atflCd, atflId } : prev));
+    },
+    onError: (_error, _file, fileKey) => {
+      setUploadedFile((prev) => (prev?.fileKey === fileKey ? null : prev));
+    },
+  });
+
+  useImperativeHandle(
+    ref,
+    () => ({
+      getFormData: () => {
+        if (!editableReviewStep || !hasFormContent(formData)) {
+          return null;
+        }
+        if (editableReviewStep === "KECO" && !canWriteKecoOpinion) {
+          return null;
+        }
+
+        return {
+          formData: {
+            ...formData,
+            opnrSeComCd: editableReviewStep,
+          },
+          rvwList,
+        };
+      },
+      resetForm: () => {
+        setFormData({
+          ...EMPTY_FORM_DATA,
+          opnrSeComCd: editableReviewStep ?? "",
+        });
+        setUploadedFile(null);
+      },
+    }),
+    [canWriteKecoOpinion, editableReviewStep, formData, rvwList],
+  );
+
+  const envRvwList = rvwList.filter((item) => item.opnrSeComCd === "ENV");
+  const kecoRvwList = rvwList.filter((item) => item.opnrSeComCd === "KECO");
+
+  const hasEnvSection = envRvwList.length > 0 || editableReviewStep === "ENV";
+  const hasKecoSection =
+    kecoRvwList.length > 0 || (editableReviewStep === "KECO" && canWriteKecoOpinion);
+
+  if (!hasEnvSection && !hasKecoSection) {
+    return null;
+  }
+
+  async function handleFileUpload(files: FileList | null) {
+    if (!files || files.length === 0) return;
+
+    const file = files[0];
+    const fileKey = createRvwOpnnUploadKey(file);
+    const existingAtflCd = formData.atchFileGroupId;
+
+    setUploadedFile({ fileName: file.name, fileKey });
+
+    try {
+      await uploadFileAsync(file, {
+        fileKey,
+        metadata: existingAtflCd ? { atflCd: existingAtflCd } : undefined,
+      });
+    } catch {
+      // onError callback handles cleanup
+    }
+  }
+
+  async function handleFileRemove() {
+    if (!uploadedFile) return;
+
+    uploads[uploadedFile.fileKey]?.abort();
+
+    if (uploadedFile.atflId) {
+      try {
+        await attachService.deleteAttachmentByAtflId(uploadedFile.atflId);
+      } catch (error) {
+        console.error("검토의견 첨부파일 삭제 실패:", error);
+      }
+    }
+
+    setUploadedFile(null);
+    setFormData((prev) => ({ ...prev, atchFileGroupId: "" }));
+  }
+
+  function renderOpinionForm(reviewStep: ReviewStepCode) {
+    if (editableReviewStep !== reviewStep) return null;
+    if (reviewStep === "KECO" && !canWriteKecoOpinion) return null;
+
+    const uploading = uploadedFile ? (isUploading[uploadedFile.fileKey] ?? false) : false;
+
+    return (
+      <div className="space-y-2">
+        <h4 className="text-xl font-semibold">검토의견 작성</h4>
+        <Table variant="secondary">
+          <TableHeader>
+            <TableRow>
+              <TableHead className="w-[12rem]">의견내용</TableHead>
+              <TableCell>
+                <Textarea
+                  value={formData.rvwRsltCn}
+                  onChange={(event) =>
+                    setFormData((prev) => ({ ...prev, rvwRsltCn: event.target.value }))
+                  }
+                  placeholder="의견내용을 입력하세요"
+                  rows={4}
+                  className="min-h-[8rem] !text-xl"
+                />
+              </TableCell>
+            </TableRow>
+            <TableRow>
+              <TableHead>검토결과</TableHead>
+              <TableCell>
+                <FieldSet>
+                  <RadioGroup
+                    value={formData.rvwRsltAnmlyYn}
+                    onValueChange={(value) =>
+                      setFormData((prev) => ({
+                        ...prev,
+                        rvwRsltAnmlyYn: value as ReviewOpinionFormData["rvwRsltAnmlyYn"],
+                      }))
+                    }
+                  >
+                    <div className="flex flex-wrap gap-4">
+                      <FieldLabel
+                        htmlFor={`rvw-opnn-normal-${reviewStep}`}
+                        className="!w-auto border-none"
+                      >
+                        <Field orientation="horizontal" className="w-auto">
+                          <RadioGroupItem value="N" id={`rvw-opnn-normal-${reviewStep}`} />
+                          <span className="font-normal">정상</span>
+                        </Field>
+                      </FieldLabel>
+                      <FieldLabel
+                        htmlFor={`rvw-opnn-abnormal-${reviewStep}`}
+                        className="!w-auto border-none"
+                      >
+                        <Field orientation="horizontal" className="w-auto">
+                          <RadioGroupItem value="Y" id={`rvw-opnn-abnormal-${reviewStep}`} />
+                          <span className="font-normal">이상</span>
+                        </Field>
+                      </FieldLabel>
+                    </div>
+                  </RadioGroup>
+                </FieldSet>
+              </TableCell>
+            </TableRow>
+            <TableRow>
+              <TableHead>첨부파일</TableHead>
+              <TableCell>
+                {uploadedFile ? (
+                  <div className="flex items-center gap-2">
+                    <TextShimmer className="text-xl" active={uploading}>
+                      {uploadedFile.fileName}
+                    </TextShimmer>
+                    <Button
+                      size="icon"
+                      onClick={(e) => {
+                        e.preventDefault();
+                        void handleFileRemove();
+                      }}
+                      disabled={uploading}
+                      className="size-8 !bg-destructive"
+                    >
+                      <i className="diveicon di-x text-xs" aria-label="삭제" />
+                    </Button>
+                  </div>
+                ) : (
+                  <label>
+                    <input
+                      type="file"
+                      className="hidden"
+                      onChange={(event) => {
+                        void handleFileUpload(event.target.files);
+                        event.target.value = "";
+                      }}
+                    />
+                    <Button size="sm" variant="outline" type="button" asChild>
+                      <span>파일 선택</span>
+                    </Button>
+                  </label>
+                )}
+              </TableCell>
+            </TableRow>
+          </TableHeader>
+        </Table>
+      </div>
+    );
+  }
+
+  return (
+    <>
+      {hasEnvSection ? (
+        <SectionCollapsible title={`${REVIEW_STEP_LABELS.ENV} 검토의견`}>
+          <div className="space-y-6">
+            {envRvwList.length > 0 ? <TechReviewOpinionTable items={envRvwList} /> : null}
+            {renderOpinionForm("ENV")}
+          </div>
+        </SectionCollapsible>
+      ) : null}
+      {hasKecoSection ? (
+        <SectionCollapsible title={`${REVIEW_STEP_LABELS.KECO} 검토의견`}>
+          <div className="space-y-6">
+            {kecoRvwList.length > 0 ? <TechReviewOpinionTable items={kecoRvwList} /> : null}
+            {renderOpinionForm("KECO")}
+          </div>
+        </SectionCollapsible>
+      ) : null}
+    </>
+  );
+});
+
+function TechReviewOpinionTable({ items }: TechReviewOpinionTableProps) {
+  return (
+    <div className="overflow-x-auto">
+      <Table variant="secondary">
+        <colgroup>
+          <col width="10%" />
+          <col width="55%" />
+          <col width="5%" />
+          <col width="20%" />
+          <col width="10%" />
+        </colgroup>
+        <TableHeader>
+          <TableRow>
+            <TableHead>의견자명</TableHead>
+            <TableHead>의견내용</TableHead>
+            <TableHead>검토결과</TableHead>
+            <TableHead>첨부파일</TableHead>
+            <TableHead>등록일시</TableHead>
+          </TableRow>
+        </TableHeader>
+        <TableBody>
+          {items.map((item) => (
+            <TableRow key={`${item.sewerBscPlanDocNo}_${item.rvwOpnnSn}`}>
+              <TableCell align="center">{item.opnrNm}</TableCell>
+              <TableCell align="left">{item.rvwRsltCn || "-"}</TableCell>
+              <TableCell align="center">
+                {item.rvwRsltAnmlyYn === "Y" ? "이상" : item.rvwRsltAnmlyYn === "N" ? "정상" : "-"}
+              </TableCell>
+              <TableCell align="center">
+                {item.atchFileInfo?.atflCd ? (
+                  <a
+                    className="inline-flex cursor-pointer items-start gap-1 text-left text-blue-600 hover:underline"
+                    href={`${PROXY_HOST}/attach-service/api/v1/atflcd/download/${item.atchFileInfo.atflCd}`}
+                    target="_blank"
+                    rel="noreferrer"
+                  >
+                    <Paperclip className="my-1 size-5 shrink-0" />
+                    {item.atchFileInfo.orgnlFileNm || "다운로드"}
+                  </a>
+                ) : (
+                  "-"
+                )}
+              </TableCell>
+              <TableCell align="center">
+                {item.regDt ? dayjs(item.regDt).format("YYYY-MM-DD HH:mm:ss") : "-"}
+              </TableCell>
+            </TableRow>
+          ))}
+        </TableBody>
+      </Table>
+    </div>
+  );
+}
+
+export { TechReviewOpinionSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-form-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-form-section.tsx
index d600d8701..dfd49b8bd 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-form-section.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-form-section.tsx
@@ -4,11 +4,11 @@ import { useId, useMemo, useState } from "react";
 import { Controller, useFieldArray, useFormContext, useWatch } from "react-hook-form";
 
 import { useConfirm } from "@frontend-opensource/use-react-hooks";
-import { Paperclip } from "lucide-react";
 
 import { getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
 import { Field } from "@/shared/ui/field";
-import { attachService, useDownloadAttachmentByAtflCd } from "@/entities/attach";
+import { attachService } from "@/entities/attach";
 import { useFacilityList } from "@/entities/bns-if";
 import { useNowDmgMtncGnsvy } from "@/entities/dc";
 import { SectionCollapsible } from "@/widgets/pbadms-sprt";
@@ -226,7 +226,6 @@ function TmplntFacilityAttachments({
 }: TmplntFacilityAttachmentsProps) {
   const formId = useId();
   const { setValue } = useFormContext<SewerBscPlanRegistFormData>();
-  const { mutate: downloadAttachment } = useDownloadAttachmentByAtflCd();
   const [uploadedFile, setUploadedFile] = useState<UploadedTmplntFile | null>(() =>
     atchFileGroupId && atchFileNm
       ? {
@@ -254,7 +253,6 @@ function TmplntFacilityAttachments({
   const fileInputId = `${formId}-tmplnt-atch-${facilityIndex}`;
   const uploading = uploadedFile ? (isUploading[uploadedFile.fileKey] ?? false) : false;
   const displayFileName = uploadedFile?.fileName ?? atchFileNm ?? "";
-  const downloadAtflCd = uploadedFile?.atflCd || atchFileGroupId;
   const hasFile = Boolean(uploadedFile || atchFileNm);
 
   async function handleFileUpload(files: FileList | null) {
@@ -315,22 +313,16 @@ function TmplntFacilityAttachments({
         </TableHeader>
         <TableBody>
           <TableRow>
-            <TableCell>{facilityName} 계획평면도</TableCell>
+            <TableHead data-required align="left">
+              {facilityName} 계획평면도
+            </TableHead>
             <TableCell className="text-center">{TMPLNT_ATCH_FORMAT_LABEL}</TableCell>
             <TableCell>
               {hasFile ? (
                 <div className="flex items-center gap-2">
-                  {downloadAtflCd ? (
-                    <a
-                      className="inline-flex cursor-pointer items-center gap-1 text-blue-600 hover:underline"
-                      onClick={() => downloadAttachment(downloadAtflCd)}
-                    >
-                      <Paperclip className="size-5 shrink-0" />
-                      {displayFileName}
-                    </a>
-                  ) : (
-                    <span className="text-xl">{displayFileName}</span>
-                  )}
+                  <TextShimmer className="text-xl" active={uploading}>
+                    {displayFileName}
+                  </TextShimmer>
                   <Button
                     type="button"
                     size="icon"
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-section.tsx
new file mode 100644
index 000000000..372f6cb60
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-section.tsx
@@ -0,0 +1,287 @@
+"use client";
+
+import { useMemo, useState } from "react";
+
+import { Paperclip } from "lucide-react";
+
+import { useDownloadAttachmentByAtflCd } from "@/entities/attach";
+import { useFacilityList } from "@/entities/bns-if";
+import { useNowDmgMtncGnsvy } from "@/entities/dc";
+import type {
+  SewerBscPlanDtlResponseDto,
+  SewerBscPlanResponseDto,
+  SewerBscPlanTmplntResponseDto,
+} from "@/entities/sewer-bsc-plan";
+import { fmtNumber, SectionCollapsible } from "@/widgets/pbadms-sprt";
+import {
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow,
+  Tabs,
+  TabsContent,
+  TabsList,
+  TabsTrigger,
+} from "@common/components";
+
+import {
+  getOriginalValue,
+  getOriginalYear,
+  PLAN_STP_NOS,
+  type TmplntFieldKey,
+} from "../../lib/tmplnt-original-mapper";
+
+interface FacilityOption {
+  code: string;
+  name: string;
+}
+
+interface TmplntSectionProps {
+  tmplntList: SewerBscPlanTmplntResponseDto[];
+  det: SewerBscPlanResponseDto;
+  dtl?: SewerBscPlanDtlResponseDto;
+}
+
+function resolveFacilityName(
+  item: SewerBscPlanTmplntResponseDto,
+  facilityOptions: FacilityOption[],
+) {
+  return (
+    item.swtrmtFcltNm || facilityOptions.find((option) => option.code === item.swtrmtFcltCd)?.name
+  );
+}
+
+const TMPLNT_FIELD_ROWS: { key: TmplntFieldKey; label: string }[] = [
+  { key: "prcsZoneArea", label: "처리구역면적(km²)" },
+  { key: "swtrmtPpltnCnt", label: "하수처리인구(명)" },
+  { key: "planSwqty", label: "계획하수량(㎥/일)" },
+  { key: "fcltCpct", label: "시설용량(㎥/일)" },
+  { key: "sprsysDrtwPplLen", label: "분류식 오수(km)" },
+  { key: "sprsysExlnPplLen", label: "분류식 우수(km)" },
+  { key: "cbsysPplLen", label: "합류식(km)" },
+  { key: "icptgPplLen", label: "차집관로(km)" },
+  { key: "drgCnt", label: "배수설비(개소)" },
+  { key: "drtwRlyPumpCnt", label: "오수 중계 펌프(개소)" },
+  { key: "drtwPumpCnt", label: "오수 일반 펌프(개소)" },
+  { key: "exlnPumpCnt", label: "우수 펌프(개소)" },
+];
+
+function getDtlValue(
+  item: SewerBscPlanTmplntResponseDto,
+  planStpNo: number,
+  fieldKey: TmplntFieldKey,
+): number | undefined {
+  return item.sewerBscPlanTmplntDtlList?.find((dtl) => dtl.planStpNo === planStpNo)?.[fieldKey];
+}
+
+interface TmplntFacilityMatrixProps {
+  item: SewerBscPlanTmplntResponseDto;
+  sido?: string;
+  gugun?: string;
+  crtrYr?: string;
+  changeStepHeaders: { planStpNo: number; year?: string }[];
+}
+
+function TmplntFacilityMatrix({
+  item,
+  sido,
+  gugun,
+  crtrYr,
+  changeStepHeaders,
+}: TmplntFacilityMatrixProps) {
+  const searchParams = useMemo(
+    () => ({
+      swtrmtFcltCd: item.swtrmtFcltCd ?? "",
+      ctpvNm: sido ?? "",
+      sggNm: gugun ?? "",
+    }),
+    [item.swtrmtFcltCd, sido, gugun],
+  );
+  const { data } = useNowDmgMtncGnsvy(searchParams);
+  const originalData = Array.isArray(data) ? (data[0] ?? null) : null;
+
+  return (
+    <Table variant="secondary">
+      <colgroup>
+        <col width="12%" />
+        <col width="9.75%" />
+        <col width="9.75%" />
+        <col width="9.75%" />
+        <col width="9.75%" />
+        <col width="10%" />
+        <col width="9.75%" />
+        <col width="9.75%" />
+        <col width="9.75%" />
+        <col width="9.75%" />
+      </colgroup>
+      <TableHeader>
+        <TableRow>
+          <TableHead className="w-[22rem]" rowSpan={2}>
+            구분
+          </TableHead>
+          <TableHead className="text-center" colSpan={4}>
+            당초
+          </TableHead>
+          <TableHead className="text-center" rowSpan={2}>
+            현재
+            <br />
+            <span className="font-normal text-muted-foreground">({crtrYr || "-"}년)</span>
+          </TableHead>
+          <TableHead className="text-center" colSpan={4}>
+            변경
+          </TableHead>
+        </TableRow>
+        <TableRow>
+          {PLAN_STP_NOS.map((planStpNo) => (
+            <TableHead key={`original-${planStpNo}`} className="text-center">
+              {planStpNo}단계
+              <br />
+              <span className="font-normal text-muted-foreground">
+                ({getOriginalYear(originalData, planStpNo)})
+              </span>
+            </TableHead>
+          ))}
+          {changeStepHeaders.map((step) => (
+            <TableHead key={`change-${step.planStpNo}`} className="text-center">
+              {step.planStpNo}단계
+              <br />
+              <span className="font-normal text-muted-foreground">({step.year || "-"})</span>
+            </TableHead>
+          ))}
+        </TableRow>
+      </TableHeader>
+      <TableBody>
+        {TMPLNT_FIELD_ROWS.map((row) => (
+          <TableRow key={row.key}>
+            <TableHead>{row.label}</TableHead>
+            {PLAN_STP_NOS.map((planStpNo) => (
+              <TableCell key={`original-${row.key}-${planStpNo}`} className="text-right">
+                {getOriginalValue(originalData, row.key, planStpNo)}
+              </TableCell>
+            ))}
+            <TableCell className="text-right">{fmtNumber(getDtlValue(item, 0, row.key))}</TableCell>
+            {changeStepHeaders.map((step) => (
+              <TableCell key={`change-${row.key}-${step.planStpNo}`} className="text-right">
+                {fmtNumber(getDtlValue(item, step.planStpNo, row.key))}
+              </TableCell>
+            ))}
+          </TableRow>
+        ))}
+      </TableBody>
+    </Table>
+  );
+}
+
+function TmplntSection({ tmplntList, det, dtl }: TmplntSectionProps) {
+  const { mutate: downloadAttachment } = useDownloadAttachmentByAtflCd();
+  const [selectedCode, setSelectedCode] = useState(tmplntList[0]?.swtrmtFcltCd ?? "");
+  const { data: facilityListData } = useFacilityList(
+    { sido: det.sido ?? "", gugun: det.gugun ?? "" },
+    { enabled: Boolean(det.sido) },
+  );
+
+  const facilityOptions =
+    facilityListData?.fctList
+      ?.filter((facility) => facility.bscFctCd)
+      .map((facility) => ({
+        code: facility.bscFctCd!,
+        name: facility.bscFctNm ?? facility.bscFctCd!,
+      })) ?? [];
+
+  const changeStepHeaders = [
+    { planStpNo: 1, year: dtl?.frlvlGoalYr },
+    { planStpNo: 2, year: dtl?.sclvlGoalYr },
+    { planStpNo: 3, year: dtl?.thlvlGoalYr },
+    { planStpNo: 4, year: dtl?.folvlGoalYr },
+  ];
+
+  if (tmplntList.length === 0) {
+    return (
+      <SectionCollapsible title="처리시설별 하수도정비기본계획">
+        <p className="py-8 text-center text-muted-foreground">선택된 처리시설이 없습니다.</p>
+      </SectionCollapsible>
+    );
+  }
+
+  return (
+    <SectionCollapsible title="처리시설별 하수도정비기본계획">
+      <Tabs
+        value={selectedCode || tmplntList[0]?.swtrmtFcltCd}
+        onValueChange={setSelectedCode}
+        className="w-full"
+      >
+        <TabsList>
+          {tmplntList.map((item) => {
+            const facilityName = resolveFacilityName(item, facilityOptions);
+            return (
+              <TabsTrigger
+                key={item.swtrmtFcltCd}
+                value={item.swtrmtFcltCd ?? ""}
+                className="!px-6 !py-3 text-xl"
+              >
+                {facilityName}
+              </TabsTrigger>
+            );
+          })}
+        </TabsList>
+
+        {tmplntList.map((item) => {
+          const facilityName = resolveFacilityName(item, facilityOptions);
+          return (
+            <TabsContent key={item.swtrmtFcltCd} value={item.swtrmtFcltCd ?? ""}>
+              <div className="overflow-x-auto">
+                <TmplntFacilityMatrix
+                  item={item}
+                  sido={det.sido}
+                  gugun={det.gugun}
+                  crtrYr={dtl?.crtrYr}
+                  changeStepHeaders={changeStepHeaders}
+                />
+              </div>
+
+              {(item.atchFileGroupId || item.atchFileInfo?.orgnlFileNm) && (
+                <div className="mt-6 space-y-2">
+                  <h3 className="mb-4 text-xl font-semibold">처리구역 필수 첨부파일</h3>
+                  <Table variant="secondary">
+                    <colgroup>
+                      <col width="35%" />
+                      <col width="65%" />
+                    </colgroup>
+                    <TableHeader>
+                      <TableRow>
+                        <TableHead align="left">파일명</TableHead>
+                        <TableHead>파일첨부</TableHead>
+                      </TableRow>
+                    </TableHeader>
+                    <TableBody>
+                      <TableRow>
+                        <TableCell>{facilityName} 계획평면도</TableCell>
+                        <TableCell>
+                          {item.atchFileGroupId ? (
+                            <a
+                              className="inline-flex cursor-pointer items-center gap-1 text-blue-600 hover:underline"
+                              onClick={() => downloadAttachment(item.atchFileGroupId ?? "")}
+                            >
+                              <Paperclip className="size-5 shrink-0" />
+                              {item.atchFileInfo?.orgnlFileNm || "다운로드"}
+                            </a>
+                          ) : (
+                            "-"
+                          )}
+                        </TableCell>
+                      </TableRow>
+                    </TableBody>
+                  </Table>
+                </div>
+              )}
+            </TabsContent>
+          );
+        })}
+      </Tabs>
+    </SectionCollapsible>
+  );
+}
+
+export { TmplntSection };
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-apply-dialog.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-apply-dialog.tsx
index 9f64c25ac..c9ad4360d 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-apply-dialog.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-apply-dialog.tsx
@@ -79,7 +79,9 @@ function SewerBscPlanApplyDialog({ open, onOpenChange, onConfirm }: SewerBscPlan
     setTaskSeComCd("");
   }, [open]);
 
-  const canConfirm = Boolean(sidoComCd && sewerBscPlanSeComCd && taskSeComCd);
+  const canSidoGugunSelectable = userInfo?.dtlInstCd !== "ROLE_USER05";
+  const canConfirm =
+    !!sewerBscPlanSeComCd && !!taskSeComCd && (!canSidoGugunSelectable || !!sidoComCd);
 
   function handleConfirm() {
     if (!canConfirm) return;
@@ -118,48 +120,50 @@ function SewerBscPlanApplyDialog({ open, onOpenChange, onConfirm }: SewerBscPlan
               <col width="35%" />
             </colgroup>
             <TableHeader>
-              <TableRow>
-                <TableHead data-required>시도</TableHead>
-                <TableCell>
-                  <Select
-                    value={sidoComCd || undefined}
-                    onValueChange={(value) => {
-                      setSidoComCd(value);
-                      setSggComCd("");
-                    }}
-                  >
-                    <SelectTrigger className="w-full">
-                      <SelectValue placeholder="선택" />
-                    </SelectTrigger>
-                    <SelectContent>
-                      {sidoOptions.map((option) => (
-                        <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
-                          {option.adstDstrNm}
-                        </SelectItem>
-                      ))}
-                    </SelectContent>
-                  </Select>
-                </TableCell>
-                <TableHead>시군구</TableHead>
-                <TableCell>
-                  <Select
-                    value={sggComCd || undefined}
-                    onValueChange={setSggComCd}
-                    disabled={!sidoComCd || isGugunPending}
-                  >
-                    <SelectTrigger className="w-full">
-                      <SelectValue placeholder="선택" />
-                    </SelectTrigger>
-                    <SelectContent>
-                      {gugunOptions.map((option) => (
-                        <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
-                          {option.adstDstrNm}
-                        </SelectItem>
-                      ))}
-                    </SelectContent>
-                  </Select>
-                </TableCell>
-              </TableRow>
+              {canSidoGugunSelectable && (
+                <TableRow>
+                  <TableHead data-required>시도</TableHead>
+                  <TableCell>
+                    <Select
+                      value={sidoComCd || undefined}
+                      onValueChange={(value) => {
+                        setSidoComCd(value);
+                        setSggComCd("");
+                      }}
+                    >
+                      <SelectTrigger className="w-full">
+                        <SelectValue placeholder="선택" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {sidoOptions.map((option) => (
+                          <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
+                            {option.adstDstrNm}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </TableCell>
+                  <TableHead>시군구</TableHead>
+                  <TableCell>
+                    <Select
+                      value={sggComCd || undefined}
+                      onValueChange={setSggComCd}
+                      disabled={!sidoComCd || isGugunPending}
+                    >
+                      <SelectTrigger className="w-full">
+                        <SelectValue placeholder="선택" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {gugunOptions.map((option) => (
+                          <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
+                            {option.adstDstrNm}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </TableCell>
+                </TableRow>
+              )}
               <TableRow>
                 <TableHead data-required>계획구분</TableHead>
                 <TableCell colSpan={3}>
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-form-page.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-form-page.tsx
index 93396633a..03c605ebe 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-form-page.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-form-page.tsx
@@ -10,6 +10,7 @@ import { useQueryClient } from "@tanstack/react-query";
 
 import { useAlertStore, useUserStore } from "@/shared/lib";
 import { useAcntgSeMngTree } from "@/entities/acntg";
+import { useEsntlAtchFileMngTree } from "@/entities/esntl";
 import {
   SewerBscPlanApplySaveResponseDto,
   sewerBscPlanBaseKey,
@@ -22,6 +23,7 @@ import {
   ChecklistFormSection,
   ContactInfoFormSection,
   isFormChecklistComplete,
+  isFormEsntlAtchComplete,
   PrivacyConsentSection,
   SplmntDmndFormSection,
 } from "@/widgets/pbadms-sprt";
@@ -34,7 +36,6 @@ import {
   mapDetailToFormData,
 } from "../lib/form-data-mapper";
 import {
-  SEWER_BSC_PLAN_DOC_SE_COM_CD,
   type SewerBscPlanRegistFormData,
   sewerBscPlanRegistSchema,
 } from "../lib/sewer-bsc-plan-regist-schema";
@@ -76,6 +77,7 @@ function SewerBscPlanFormPage({
   const isSplmntPrgrsStts = initialData?.detDto?.prgrsSttsComCd === "SL";
 
   const { data: acntgTree = [] } = useAcntgSeMngTree();
+  const { data: essentialFiles = [] } = useEsntlAtchFileMngTree({ docSeComCd: "SEWER" });
   const costItems = useMemo(() => buildAcntgCostItems(acntgTree), [acntgTree]);
 
   const form = useForm<SewerBscPlanRegistFormData>({
@@ -140,18 +142,28 @@ function SewerBscPlanFormPage({
       return;
     }
 
+    if (data.sewerBscPlanTmplntList.some((item) => !item.atchFileGroupId?.trim())) {
+      alert("처리구역 필수 첨부파일을 모두 등록해야 신청이 가능합니다.");
+      return;
+    }
+
     if (!isFormChecklistComplete(data.cklstResultList)) {
       alert("모든 체크리스트 항목을 체크해야 신청이 가능합니다.");
       return;
     }
 
+    if (!isFormEsntlAtchComplete(essentialFiles, data.esntlAtchFileList)) {
+      alert("필수 첨부파일을 모두 등록해야 신청이 가능합니다.");
+      return;
+    }
+
     try {
       setIsSubmitting(true);
-      const docNo = await submitForm(data, "LE");
-      if (!docNo) return;
+      const result = await submitForm(data, "LE");
+      if (!result?.sewerBscPlanDocNo) return;
 
       alert("신청 완료되었습니다.");
-      router.push(`/sewer-bsc-plan/${docNo}`);
+      router.push(`/sewer-bsc-plan/${result.sewerBscPlanDocNo}?chgCycl=${result.chgCycl ?? 1}`);
       queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
     } catch (error) {
       console.error("신청 실패:", error);
@@ -165,10 +177,10 @@ function SewerBscPlanFormPage({
     if (isSubmitting) return;
 
     const hasEmptySplmntCn = data.splmntDmndList?.some(
-      (item) => !item.splmntCn || !item.splmntCn.trim(),
+      (item) => item.cmptnYn === "N" && (!item.splmntCn || !item.splmntCn.trim()),
     );
     if (hasEmptySplmntCn) {
-      alert("보완요청내용이 있습니다. 보완완료내용을 입력해 주세요.");
+      alert("보완요청 항목이 있습니다.\n보완완료 내용을 입력해 주세요.");
       return;
     }
 
@@ -187,7 +199,8 @@ function SewerBscPlanFormPage({
       if (!result) return;
 
       alert("보완완료 처리되었습니다.");
-      router.push(`/sewer-bsc-plan/${docNo}`);
+      const chgCycl = data.sewerBscPlanDtl.chgCycl ?? initialData?.detDto?.chgCycl ?? 1;
+      router.push(`/sewer-bsc-plan/${docNo}?chgCycl=${chgCycl}`);
       queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
     } catch (error) {
       console.error("보완완료 실패:", error);
@@ -236,12 +249,9 @@ function SewerBscPlanFormPage({
         <BizCstMatrixFormSection />
         <FnrsCstFormSection />
         <TmplntFormSection />
-        <ChecklistFormSection
-          docSeComCd={SEWER_BSC_PLAN_DOC_SE_COM_CD}
-          fieldPrefix="sewerBscPlan"
-        />
+        <ChecklistFormSection docSeComCd="SEWER" fieldPrefix="sewerBscPlan" />
         <AttachmentsFormSection
-          docSeComCd={SEWER_BSC_PLAN_DOC_SE_COM_CD}
+          docSeComCd="SEWER"
           fieldPrefix="sewerBscPlanDtl"
           initialEsntlFiles={isEditMode ? initialData?.esntlFileList : undefined}
           initialEtcFiles={isEditMode ? initialData?.etcFileList : undefined}
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-list.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-list.tsx
index 21cc997b7..b2f80834c 100644
--- a/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-list.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-list.tsx
@@ -55,7 +55,7 @@ function SewerBscPlanList({ searchParams, pagination, onPaginationChange }: Sewe
     router.push(
       canEdit
         ? `/sewer-bsc-plan/${row.sewerBscPlanDocNo}/edit?chgCycl=${row.chgCycl}`
-        : `/sewer-bsc-plan/${row.sewerBscPlanDocNo}`,
+        : `/sewer-bsc-plan/${row.sewerBscPlanDocNo}?chgCycl=${row.chgCycl}`,
     );
   };
 
diff --git a/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-view-page.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-view-page.tsx
new file mode 100644
index 000000000..293d31bd8
--- /dev/null
+++ b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-view-page.tsx
@@ -0,0 +1,138 @@
+"use client";
+
+import { useMemo, useRef } from "react";
+
+import { useUserStore } from "@/shared/lib";
+import { ElaprDocPrgrsStatus } from "@/entities/elapr";
+import { useRvwMnpwMngLoginUserList } from "@/entities/rvw-mnpw";
+import { useSewerBscPlanDetails } from "@/entities/sewer-bsc-plan";
+import { SectionCollapsible, SupplementDemandSection } from "@/widgets/pbadms-sprt";
+import { Skeleton } from "@common/components";
+
+import { needsRoleUser01AtrzResolve } from "../lib/button-config";
+import { getEditableReviewStep } from "../lib/review-step-utils";
+import { EMPTY_CKLST_RESULT_LIST, useChecklistFormState } from "../lib/use-checklist-form-state";
+
+import { FloatingActionButtons } from "./components/floating-action-buttons";
+import { AttachmentsSection } from "./sections/attachments-section";
+import { BasicInfoSection } from "./sections/basic-info-section";
+import { BizCstMatrixSection } from "./sections/biz-cst-matrix-section";
+import { ChecklistSection } from "./sections/checklist-section";
+import { ContactInfoSection } from "./sections/contact-info-section";
+import { FnrsCstSection } from "./sections/fnrs-cst-section";
+import { OutlineSection } from "./sections/outline-section";
+import {
+  TechReviewOpinionSection,
+  type TechReviewOpinionSectionHandle,
+} from "./sections/tech-review-opinion-section";
+import { TmplntSection } from "./sections/tmplnt-section";
+
+interface SewerBscPlanViewPageProps {
+  id: string;
+  propChgCycl?: number;
+}
+
+function SewerBscPlanViewPage({ id, propChgCycl }: SewerBscPlanViewPageProps) {
+  const userInfo = useUserStore((state) => state.userInfo);
+  const techReviewOpinionRef = useRef<TechReviewOpinionSectionHandle>(null);
+  const chgCycl = propChgCycl ?? 1;
+  const { data, isLoading, isError } = useSewerBscPlanDetails(id, chgCycl);
+  const { formState: checklistFormState, setFormState: setChecklistFormState } =
+    useChecklistFormState(data?.cklstResultRows ?? EMPTY_CKLST_RESULT_LIST);
+
+  const prgrsSttsComCd = data?.detDto?.prgrsSttsComCd || "";
+  const needsAtrzResolve = needsRoleUser01AtrzResolve(userInfo?.dtlInstCd, prgrsSttsComCd);
+  const { data: rvwLoginUserData, isLoading: isRvwLoginUserLoading } = useRvwMnpwMngLoginUserList(
+    {},
+    { enabled: needsAtrzResolve },
+  );
+  const atrzSeComCdList = useMemo(
+    () => rvwLoginUserData?.content?.map((item) => item.atrzSeComCd) ?? [],
+    [rvwLoginUserData],
+  );
+
+  if (isLoading) {
+    return (
+      <div className="mt-6 flex flex-col gap-4 px-6">
+        <div className="flex flex-col gap-2">
+          <Skeleton className="h-[4rem] rounded-xl" />
+          <Skeleton className="h-[16rem] rounded-xl" />
+        </div>
+        <div className="flex flex-col gap-2">
+          <Skeleton className="h-[4rem] rounded-xl" />
+          <Skeleton className="h-[16rem] rounded-xl" />
+        </div>
+        <div className="flex flex-col gap-2">
+          <Skeleton className="h-[4rem] rounded-xl" />
+          <Skeleton className="h-[32rem] rounded-xl" />
+        </div>
+      </div>
+    );
+  }
+
+  if (isError || !data?.detDto) {
+    return <div className="mt-6 text-[1.4rem]">상세 정보를 찾을 수 없습니다.</div>;
+  }
+
+  const detDto = data.detDto;
+  const activeDtlDto = data.activeDtlDto;
+  const otlnList = data.otlnList ?? [];
+  const bizCstList = data.bizCstList ?? [];
+  const fnrsCstList = data.fnrsCstList ?? [];
+  const tmplntList = data.tmplntList ?? [];
+  const cklstResultRows = data.cklstResultRows ?? [];
+  const esntlFileList = data.esntlFileList ?? [];
+  const etcFileList = data.etcFileList ?? [];
+  const rvwOpnnList = data.rvwOpnnList ?? [];
+  const splmntDmndList = data.splmntDmndList ?? [];
+
+  const editableReviewStep = getEditableReviewStep(
+    userInfo?.dtlInstCd,
+    detDto.prgrsSttsComCd || "",
+  );
+
+  return (
+    <div className="mt-6 space-y-4">
+      <BasicInfoSection det={detDto} dtl={activeDtlDto} />
+      <ContactInfoSection dtl={activeDtlDto} />
+      <SectionCollapsible title="결재현황">
+        <ElaprDocPrgrsStatus elaprDocNo={detDto.sewerBscPlanDocNo} />
+      </SectionCollapsible>
+      <OutlineSection otlnList={otlnList} dtl={activeDtlDto} />
+      <BizCstMatrixSection bizCstList={bizCstList} dtl={activeDtlDto} />
+      <FnrsCstSection fnrsCstList={fnrsCstList} dtl={activeDtlDto} />
+      <TmplntSection tmplntList={tmplntList} det={detDto} dtl={activeDtlDto} />
+      <ChecklistSection
+        cklstResultList={cklstResultRows}
+        prgrsSttsComCd={detDto.prgrsSttsComCd || ""}
+        userRoleCode={userInfo?.dtlInstCd}
+        formState={checklistFormState}
+        setFormState={setChecklistFormState}
+      />
+      <AttachmentsSection esntlFileList={esntlFileList} etcFileList={etcFileList} />
+      <SupplementDemandSection splmntDmndList={splmntDmndList} />
+      <TechReviewOpinionSection
+        ref={techReviewOpinionRef}
+        rvwList={rvwOpnnList}
+        editableReviewStep={editableReviewStep}
+        atrzSeComCdList={atrzSeComCdList}
+        isAtrzLoading={needsAtrzResolve && isRvwLoginUserLoading}
+      />
+      <FloatingActionButtons
+        data={data}
+        docSeComCd="SEWER"
+        sewerBscPlanDocNo={detDto.sewerBscPlanDocNo}
+        chgCycl={chgCycl}
+        prgrsSttsComCd={detDto.prgrsSttsComCd || ""}
+        dtlInstCd={userInfo?.dtlInstCd}
+        atrzSeComCdList={atrzSeComCdList}
+        isRvwLoginUserLoading={needsAtrzResolve && isRvwLoginUserLoading}
+        checklistFormState={checklistFormState}
+        techReviewOpinionRef={techReviewOpinionRef}
+        opnrNm={userInfo?.userName}
+      />
+    </div>
+  );
+}
+
+export { SewerBscPlanViewPage };
diff --git a/apps/as/src/shared/model/pbadms-sprt.ts b/apps/as/src/shared/model/pbadms-sprt.ts
index 2196ac07a..67b0b831e 100644
--- a/apps/as/src/shared/model/pbadms-sprt.ts
+++ b/apps/as/src/shared/model/pbadms-sprt.ts
@@ -188,7 +188,7 @@ export interface EsntlAtchFileSaveBase {
 
 /** 보완요구 저장 공통 필드 */
 export interface SplmntDmndSaveBase {
-  splmntDmndSn?: number;
+  splmntDmndSn?: number | null;
   splmntArtclComCd?: string;
   splmntDmndCn?: string;
   splmntDmndDt?: string;
diff --git a/apps/as/src/shared/ui/alert-dialog.tsx b/apps/as/src/shared/ui/alert-dialog.tsx
index f331b65ff..aa7d367b5 100644
--- a/apps/as/src/shared/ui/alert-dialog.tsx
+++ b/apps/as/src/shared/ui/alert-dialog.tsx
@@ -1,12 +1,6 @@
 "use client";
 
-import {
-  Button,
-  Dialog,
-  DialogClose,
-  DialogContent,
-  DialogFooter,
-} from "@common/components";
+import { Button, Dialog, DialogClose, DialogContent, DialogFooter } from "@common/components";
 
 import { useAlertStore } from "../lib/use-alert-store";
 
@@ -20,7 +14,7 @@ function AlertDialog() {
     <Dialog open={!!message} onOpenChange={handleOpenChange}>
       <DialogContent aria-describedby={undefined}>
         <div className="py-10">
-          <p className="text-foreground whitespace-pre-line text-center text-[1.4rem]">
+          <p className="whitespace-pre-line break-keep text-center text-[1.4rem] text-foreground">
             {message}
           </p>
         </div>
diff --git a/apps/as/src/shared/ui/index.ts b/apps/as/src/shared/ui/index.ts
index 7dbfe574f..926342b84 100644
--- a/apps/as/src/shared/ui/index.ts
+++ b/apps/as/src/shared/ui/index.ts
@@ -1,2 +1,4 @@
-export { PageLayout } from "./page-layout";
 export { NoData } from "./no-data";
+export { PageLayout } from "./page-layout";
+export type { TextShimmerProps } from "./text-shimmer";
+export { TEXT_SHIMMER_CLASS, TextShimmer } from "./text-shimmer";
diff --git a/apps/as/src/shared/ui/text-shimmer.tsx b/apps/as/src/shared/ui/text-shimmer.tsx
new file mode 100644
index 000000000..7869591f7
--- /dev/null
+++ b/apps/as/src/shared/ui/text-shimmer.tsx
@@ -0,0 +1,19 @@
+import { cn } from "@common/components";
+
+const TEXT_SHIMMER_CLASS =
+  "animate-text-shimmer bg-gradient-to-r from-muted-foreground via-muted to-muted-foreground bg-[length:200%_100%] bg-clip-text text-transparent";
+
+interface TextShimmerProps extends React.ComponentPropsWithoutRef<"span"> {
+  active?: boolean;
+}
+
+function TextShimmer({ active = false, className, children, ...props }: TextShimmerProps) {
+  return (
+    <span className={cn(className, active && TEXT_SHIMMER_CLASS)} {...props}>
+      {children}
+    </span>
+  );
+}
+
+export { TEXT_SHIMMER_CLASS, TextShimmer };
+export type { TextShimmerProps };
diff --git a/apps/as/src/widgets/pbadms-sprt/index.ts b/apps/as/src/widgets/pbadms-sprt/index.ts
index ec019ee63..8f2c44b95 100644
--- a/apps/as/src/widgets/pbadms-sprt/index.ts
+++ b/apps/as/src/widgets/pbadms-sprt/index.ts
@@ -3,6 +3,7 @@ export {
   createEtcUploadKey,
   createUploadKey,
   isEtcFileKey,
+  isFormEsntlAtchComplete,
 } from "./lib/attachments-form-utils";
 export {
   buildAcntgCostItems,
diff --git a/apps/as/src/widgets/pbadms-sprt/lib/attachments-form-utils.ts b/apps/as/src/widgets/pbadms-sprt/lib/attachments-form-utils.ts
index 698ae70d3..7b55cb4fa 100644
--- a/apps/as/src/widgets/pbadms-sprt/lib/attachments-form-utils.ts
+++ b/apps/as/src/widgets/pbadms-sprt/lib/attachments-form-utils.ts
@@ -1,4 +1,5 @@
 import { getDefaultFileKey } from "@/shared/lib";
+import type { EsntlAtchFileMngTreeResponseDto } from "@/shared/model";
 
 export type FieldPrefix =
   | "fnrsCnsltnMng"
@@ -9,6 +10,11 @@ export type FieldPrefix =
 
 export const ETC_FILE_KEY_PREFIX = "etc::";
 
+interface EsntlAtchFileListItem {
+  esntlAtchFileId: string;
+  atchFileGroupId: string;
+}
+
 export function atchFileGroupIdPath(fieldPrefix: FieldPrefix): string {
   return `${fieldPrefix}.atchFileGroupId`;
 }
@@ -35,3 +41,21 @@ export function toFileAccept(rmrk: string | null | undefined): string {
     .map((ext) => (ext.startsWith(".") ? ext : `.${ext}`))
     .join(",");
 }
+
+export function isFormEsntlAtchComplete(
+  essentialFiles: EsntlAtchFileMngTreeResponseDto[],
+  esntlAtchFileList: EsntlAtchFileListItem[],
+): boolean {
+  if (essentialFiles.length === 0) return true;
+
+  const requiredFiles = essentialFiles.filter((file) => file.esntlAtchYn === "Y");
+  if (requiredFiles.length === 0) return true;
+
+  const attachedIds = new Set(
+    esntlAtchFileList
+      .filter((item) => Boolean(item.atchFileGroupId))
+      .map((item) => item.esntlAtchFileId),
+  );
+
+  return requiredFiles.every((file) => attachedIds.has(file.esntlAtchFileId));
+}
diff --git a/apps/as/src/widgets/pbadms-sprt/ui/attachments-form-section.tsx b/apps/as/src/widgets/pbadms-sprt/ui/attachments-form-section.tsx
index abe10c1b5..03d812211 100644
--- a/apps/as/src/widgets/pbadms-sprt/ui/attachments-form-section.tsx
+++ b/apps/as/src/widgets/pbadms-sprt/ui/attachments-form-section.tsx
@@ -8,6 +8,7 @@ import { useQueryClient } from "@tanstack/react-query";
 import { ENDPOINT } from "@/shared/config";
 import { useTus } from "@/shared/lib";
 import type { AtflMngClientResponseDto, EsntlAtchFileMngTreeResponseDto } from "@/shared/model";
+import { TextShimmer } from "@/shared/ui";
 import { attachService } from "@/entities/attach";
 import { useEsntlAtchFileMngTree } from "@/entities/esntl";
 import {
@@ -413,20 +414,21 @@ function AttachmentsFormSection({
 
                                 return (
                                   <div key={item.fileKey} className="flex items-center gap-2">
-                                    <span className="text-xl">
+                                    <TextShimmer className="text-xl" active={uploading}>
                                       {item.file?.name ?? item.fileName}
-                                    </span>
-                                    <Button
-                                      size="icon"
-                                      onClick={(e) => {
-                                        e.preventDefault();
-                                        void removeEssentialFile(file.esntlAtchFileId, idx);
-                                      }}
-                                      disabled={uploading}
-                                      className="size-8 !bg-destructive"
-                                    >
-                                      <i className="diveicon di-x text-xs" aria-label="삭제" />
-                                    </Button>
+                                    </TextShimmer>
+                                    {!uploading && (
+                                      <Button
+                                        size="icon"
+                                        onClick={(e) => {
+                                          e.preventDefault();
+                                          void removeEssentialFile(file.esntlAtchFileId, idx);
+                                        }}
+                                        className="size-8 !bg-destructive"
+                                      >
+                                        <i className="diveicon di-x text-xs" aria-label="삭제" />
+                                      </Button>
+                                    )}
                                   </div>
                                 );
                               })}
@@ -489,7 +491,9 @@ function AttachmentsFormSection({
                       key={item.fileKey}
                       className="flex items-center justify-between rounded-sm border p-2"
                     >
-                      <span className="px-2 text-xl">{item.file?.name ?? item.fileName}</span>
+                      <TextShimmer className="px-2 text-xl" active={uploading}>
+                        {item.file?.name ?? item.fileName}
+                      </TextShimmer>
                       <Button
                         size="sm"
                         color="gray"
diff --git a/apps/as/src/widgets/pbadms-sprt/ui/checklist-form-section.tsx b/apps/as/src/widgets/pbadms-sprt/ui/checklist-form-section.tsx
index 572c9f2c3..36fb793ae 100644
--- a/apps/as/src/widgets/pbadms-sprt/ui/checklist-form-section.tsx
+++ b/apps/as/src/widgets/pbadms-sprt/ui/checklist-form-section.tsx
@@ -25,7 +25,11 @@ import {
   TabsTrigger,
 } from "@common/components";
 
-import { buildChecklistTabs, normalizeTaskSeComCdArray, syncCklstResultListFromTree } from "../lib/checklist-form-utils";
+import {
+  buildChecklistTabs,
+  normalizeTaskSeComCdArray,
+  syncCklstResultListFromTree,
+} from "../lib/checklist-form-utils";
 
 import { SectionCollapsible } from "./section-collapsible";
 
@@ -49,10 +53,7 @@ function ChecklistFormSection({ docSeComCd, fieldPrefix }: ChecklistFormSectionP
   const { watch, setValue, control, getValues } = useFormContext();
   const [activeTab, setActiveTab] = useState("");
   const taskSeComCd = watch(`${fieldPrefix}.taskSeComCd`) as string | string[] | undefined;
-  const taskSeComCdArray = useMemo(
-    () => normalizeTaskSeComCdArray(taskSeComCd),
-    [taskSeComCd],
-  );
+  const taskSeComCdArray = useMemo(() => normalizeTaskSeComCdArray(taskSeComCd), [taskSeComCd]);
   const cklstResultList =
     (useWatch({ control, name: "cklstResultList" }) as CklstResultListItem[] | undefined) ?? [];
 
@@ -206,6 +207,7 @@ function ChecklistFormSection({ docSeComCd, fieldPrefix }: ChecklistFormSectionP
                       <Button
                         type="button"
                         size="sm"
+                        color="white"
                         onClick={(e) => {
                           e.preventDefault();
                           handleSelectAll(tab.code, "Y");
@@ -218,11 +220,11 @@ function ChecklistFormSection({ docSeComCd, fieldPrefix }: ChecklistFormSectionP
                       <Button
                         type="button"
                         size="sm"
+                        color="gray"
                         onClick={(e) => {
                           e.preventDefault();
                           handleSelectAll(tab.code, "N");
                         }}
-                        className="!bg-destructive"
                       >
                         전체 아니오
                       </Button>
diff --git a/apps/as/src/widgets/pbadms-sprt/ui/fnrs-shar-form-section.tsx b/apps/as/src/widgets/pbadms-sprt/ui/fnrs-shar-form-section.tsx
index e8bff5b35..5365db9c9 100644
--- a/apps/as/src/widgets/pbadms-sprt/ui/fnrs-shar-form-section.tsx
+++ b/apps/as/src/widgets/pbadms-sprt/ui/fnrs-shar-form-section.tsx
@@ -4,6 +4,7 @@ import { useEffect, useMemo, useState } from "react";
 import { Controller, useFormContext, useWatch } from "react-hook-form";
 
 import { getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
 import { Field } from "@/shared/ui/field";
 import { useAcntgSeMngTree } from "@/entities/acntg";
 import type { AtflMngClientResponseDto } from "@/entities/fnrs-cnsltn";
@@ -257,12 +258,18 @@ function FnrsSharFormSection({ initialSharTree, initialSharAtchFiles }: FnrsShar
       <div className="mt-6 px-2 pb-2">
         <h3 className="mb-2 text-xl font-semibold">첨부파일</h3>
         <div className="flex flex-wrap items-center gap-2">
-          <Input
-            value={uploadedFileName}
-            readOnly
-            placeholder="총사업비 신청서(.hwp) 파일을 등록해주세요."
-            className="max-w-lg rounded-sm"
-          />
+          {isSharUploading && uploadedFileName ? (
+            <TextShimmer className="max-w-lg text-xl" active>
+              {uploadedFileName}
+            </TextShimmer>
+          ) : (
+            <Input
+              value={uploadedFileName}
+              readOnly
+              placeholder="총사업비 신청서(.hwp) 파일을 등록해주세요."
+              className="max-w-lg rounded-sm"
+            />
+          )}
           <Button type="button" color="white" disabled={isSharUploading} asChild>
             <label className="cursor-pointer">
               첨부파일
diff --git a/apps/as/src/widgets/pbadms-sprt/ui/pbadms-task-apply-dialog.tsx b/apps/as/src/widgets/pbadms-sprt/ui/pbadms-task-apply-dialog.tsx
index 9d753b276..640073573 100644
--- a/apps/as/src/widgets/pbadms-sprt/ui/pbadms-task-apply-dialog.tsx
+++ b/apps/as/src/widgets/pbadms-sprt/ui/pbadms-task-apply-dialog.tsx
@@ -72,7 +72,8 @@ function PbadmsTaskApplyDialog({
   const sidoOptions = sidoData ?? EMPTY_ADST_LIST;
   const gugunOptions = gugunData ?? EMPTY_ADST_LIST;
   const isPending = isSidoPending || isTaskSePending;
-  const canConfirm = Boolean(sidoComCd && selectedCodes.length > 0);
+  const canSidoGugunSelectable = userInfo?.dtlInstCd !== "ROLE_USER05";
+  const canConfirm = selectedCodes.length > 0 && (!canSidoGugunSelectable || !!sidoComCd);
 
   useEffect(() => {
     if (!open) return;
@@ -121,48 +122,50 @@ function PbadmsTaskApplyDialog({
               <col width="35%" />
             </colgroup>
             <TableHeader>
-              <TableRow>
-                <TableHead data-required>시도</TableHead>
-                <TableCell>
-                  <Select
-                    value={sidoComCd || undefined}
-                    onValueChange={(value) => {
-                      setSidoComCd(value);
-                      setSggComCd("");
-                    }}
-                  >
-                    <SelectTrigger className="w-full">
-                      <SelectValue placeholder="선택" />
-                    </SelectTrigger>
-                    <SelectContent>
-                      {sidoOptions.map((option) => (
-                        <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
-                          {option.adstDstrNm}
-                        </SelectItem>
-                      ))}
-                    </SelectContent>
-                  </Select>
-                </TableCell>
-                <TableHead>시군구</TableHead>
-                <TableCell>
-                  <Select
-                    value={sggComCd || undefined}
-                    onValueChange={setSggComCd}
-                    disabled={!sidoComCd || isGugunPending}
-                  >
-                    <SelectTrigger className="w-full">
-                      <SelectValue placeholder="선택" />
-                    </SelectTrigger>
-                    <SelectContent>
-                      {gugunOptions.map((option) => (
-                        <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
-                          {option.adstDstrNm}
-                        </SelectItem>
-                      ))}
-                    </SelectContent>
-                  </Select>
-                </TableCell>
-              </TableRow>
+              {canSidoGugunSelectable && (
+                <TableRow>
+                  <TableHead data-required>시도</TableHead>
+                  <TableCell>
+                    <Select
+                      value={sidoComCd || undefined}
+                      onValueChange={(value) => {
+                        setSidoComCd(value);
+                        setSggComCd("");
+                      }}
+                    >
+                      <SelectTrigger className="w-full">
+                        <SelectValue placeholder="선택" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {sidoOptions.map((option) => (
+                          <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
+                            {option.adstDstrNm}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </TableCell>
+                  <TableHead>시군구</TableHead>
+                  <TableCell>
+                    <Select
+                      value={sggComCd || undefined}
+                      onValueChange={setSggComCd}
+                      disabled={!sidoComCd || isGugunPending}
+                    >
+                      <SelectTrigger className="w-full">
+                        <SelectValue placeholder="선택" />
+                      </SelectTrigger>
+                      <SelectContent>
+                        {gugunOptions.map((option) => (
+                          <SelectItem key={option.adstDstrCd} value={option.adstDstrCd}>
+                            {option.adstDstrNm}
+                          </SelectItem>
+                        ))}
+                      </SelectContent>
+                    </Select>
+                  </TableCell>
+                </TableRow>
+              )}
               <TableRow>
                 <TableHead data-required>업무구분</TableHead>
                 <TableCell colSpan={3}>
diff --git a/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-dialog.tsx b/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-dialog.tsx
index 9373285c2..24dbace6e 100644
--- a/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-dialog.tsx
+++ b/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-dialog.tsx
@@ -3,6 +3,7 @@
 import { useEffect, useId, useState } from "react";
 
 import { getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
 import { attachService } from "@/entities/attach";
 import { CodeSelect } from "@/entities/code";
 import {
@@ -21,7 +22,6 @@ import {
   Textarea,
 } from "@common/components";
 
-const SPLMNT_ARTCL_UP_CD = "SPLMNTARTCL";
 const SPLMNT_DMND_FILE_KEY_PREFIX = "splmnt-dmnd::";
 
 interface UploadedSplmntFile {
@@ -50,6 +50,7 @@ interface SplmntDmndDialogConfirmPayload {
 }
 
 interface SplmntDmndDialogProps {
+  splmntArtclUpCd: string;
   open: boolean;
   onOpenChange: (open: boolean) => void;
   isSubmitting?: boolean;
@@ -86,7 +87,13 @@ function isRowsValid(rows: SplmntDmndRow[]) {
   return rows.every((row) => row.splmntArtclComCd.trim() && row.splmntDmndCn.trim());
 }
 
-function SplmntDmndDialog({ open, onOpenChange, isSubmitting, onConfirm }: SplmntDmndDialogProps) {
+function SplmntDmndDialog({
+  splmntArtclUpCd,
+  open,
+  onOpenChange,
+  isSubmitting,
+  onConfirm,
+}: SplmntDmndDialogProps) {
   const formId = useId();
   const [rows, setRows] = useState<SplmntDmndRow[]>([createEmptyRow()]);
 
@@ -239,7 +246,7 @@ function SplmntDmndDialog({ open, onOpenChange, isSubmitting, onConfirm }: Splmn
                     <TableRow key={row.rowKey}>
                       <TableCell align="center" className="align-top">
                         <CodeSelect
-                          upCd={SPLMNT_ARTCL_UP_CD}
+                          upCd={splmntArtclUpCd}
                           value={row.splmntArtclComCd || undefined}
                           onValueChange={(value) =>
                             updateRow(row.rowKey, { splmntArtclComCd: value })
@@ -263,7 +270,9 @@ function SplmntDmndDialog({ open, onOpenChange, isSubmitting, onConfirm }: Splmn
                         <div className="flex items-center gap-2">
                           {row.uploadedFile ? (
                             <div className="flex items-stretch gap-2">
-                              <span className="text-xl">{row.uploadedFile.fileName}</span>
+                              <TextShimmer className="text-xl" active={uploading}>
+                                {row.uploadedFile.fileName}
+                              </TextShimmer>
                               <Button
                                 type="button"
                                 size="icon"
diff --git a/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-form-section.tsx b/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-form-section.tsx
index 28cb40497..6a8d94670 100644
--- a/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-form-section.tsx
+++ b/apps/as/src/widgets/pbadms-sprt/ui/splmnt-dmnd-form-section.tsx
@@ -6,6 +6,7 @@ import { Controller, useFormContext, useWatch } from "react-hook-form";
 import { Paperclip } from "lucide-react";
 
 import { dayjs, getDefaultFileKey, useTus } from "@/shared/lib";
+import { TextShimmer } from "@/shared/ui";
 import { attachService, useDownloadAttachmentByAtflCd } from "@/entities/attach";
 import {
   Badge,
@@ -272,7 +273,9 @@ function SplmntDmndFormSection({ readOnly = false }: SplmntDmndFormSectionProps)
                             {uploaded.fileName}
                           </a>
                         ) : (
-                          <span className="text-xl">{uploaded.fileName}</span>
+                          <TextShimmer className="text-xl" active={uploading}>
+                            {uploaded.fileName}
+                          </TextShimmer>
                         )}
                         {!isRowReadOnly ? (
                           <Button
diff --git a/apps/as/src/widgets/pbadms-sprt/ui/supplement-demand-section.tsx b/apps/as/src/widgets/pbadms-sprt/ui/supplement-demand-section.tsx
index c4637fd4e..8c7d6a8c7 100644
--- a/apps/as/src/widgets/pbadms-sprt/ui/supplement-demand-section.tsx
+++ b/apps/as/src/widgets/pbadms-sprt/ui/supplement-demand-section.tsx
@@ -26,6 +26,10 @@ interface SupplementDemandSectionProps {
 function SupplementDemandSection({ splmntDmndList }: SupplementDemandSectionProps) {
   const { mutate: downloadAttachment } = useDownloadAttachmentByAtflCd();
 
+  if (splmntDmndList.length === 0) {
+    return null;
+  }
+
   return (
     <SectionCollapsible title="보완요청 및 완료 현황">
       <div className="overflow-x-auto">
diff --git a/tailwind.config.preset.ts b/tailwind.config.preset.ts
index 4637a88a0..1a6268e6a 100644
--- a/tailwind.config.preset.ts
+++ b/tailwind.config.preset.ts
@@ -83,12 +83,17 @@ export default {
           from: { transform: "translate(0,0) rotate(0deg)" },
           to: { transform: "translate(0,0) rotate(360deg)" },
         },
+        "text-shimmer": {
+          "0%": { backgroundPosition: "200% center" },
+          "100%": { backgroundPosition: "-200% center" },
+        },
       },
       animation: {
         "accordion-down": "accordion-down 0.2s ease-out",
         "accordion-up": "accordion-up 0.2s ease-out",
         "spin-parent": "spin-parent 6s linear infinite",
         "spin-child": "spin-child 1s ease-in-out infinite",
+        "text-shimmer": "text-shimmer 1.5s linear infinite",
       },
       backgroundImage: {
         "gradient-blue": "linear-gradient(.25turn, #2094fa, #00e5dd)",