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 49c770d85..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,
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 6c7b9360c..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;
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..f53e1bc72 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
@@ -2,6 +2,8 @@
 
 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 { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
@@ -71,12 +73,10 @@ 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,
@@ -317,11 +317,12 @@ 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/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..21ea2c7a6 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
@@ -2,6 +2,8 @@
 
 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 { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
@@ -71,12 +73,10 @@ 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,
@@ -336,11 +336,12 @@ 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/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..eb5530c78 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
@@ -2,6 +2,8 @@
 
 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 { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
@@ -67,12 +69,10 @@ 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,
@@ -329,11 +329,12 @@ 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/lib/form-data-mapper.ts b/apps/as/src/pages/sewer-bsc-plan/lib/form-data-mapper.ts
index 25a39aab0..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
@@ -1,9 +1,9 @@
-/* eslint-disable @typescript-eslint/no-unused-vars */
 import type { IUserInfo } from "@/shared/store";
 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";
@@ -245,47 +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(
-      ({ 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(
-      ({
-        splmntArtclCdNm,
-        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/save-payload-utils.ts b/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
similarity index 94%
rename from apps/as/src/pages/sewer-bsc-plan/lib/save-payload-utils.ts
rename to apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
index e2fc31f0a..320044a14 100644
--- a/apps/as/src/pages/sewer-bsc-plan/lib/save-payload-utils.ts
+++ b/apps/as/src/pages/sewer-bsc-plan/lib/payload-utils.ts
@@ -146,10 +146,8 @@ export function buildSupplementReqPayload(
     toSplmntDmndSaveItem(item),
   );
 
-  const nextSn = existingItems.reduce((max, item) => Math.max(max, item.splmntDmndSn ?? 0), 0) + 1;
-
-  const newItems: SewerBscPlanSplmntDmndItem[] = payload.items.map((item, index) => ({
-    splmntDmndSn: nextSn + index,
+  const newItems: SewerBscPlanSplmntDmndItem[] = payload.items.map((item) => ({
+    splmntDmndSn: null,
     splmntArtclComCd: item.splmntArtclComCd,
     splmntDmndCn: item.splmntDmndCn,
     splmntDmndAtchFileGroupId: item.splmntDmndAtchFileGroupId,
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/model/columns.tsx b/apps/as/src/pages/sewer-bsc-plan/model/columns.tsx
index dfe5aebd3..ec387c8cb 100644
--- a/apps/as/src/pages/sewer-bsc-plan/model/columns.tsx
+++ b/apps/as/src/pages/sewer-bsc-plan/model/columns.tsx
@@ -46,8 +46,9 @@ function buildProgressBadges(prgrsSttsComCd: string, prgrsSttsCdNm: string): Pro
     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" },
+      { label: MAIN_STEP_LABELS.envoReview, state: "action" },
+      { label: MAIN_STEP_LABELS.techReview, state: "pending" },
+      { label: MAIN_STEP_LABELS.reply, state: "pending" },
     ];
   }
 
@@ -56,8 +57,8 @@ function buildProgressBadges(prgrsSttsComCd: string, prgrsSttsCdNm: string): Pro
       { 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" },
     ];
   }
 
@@ -71,16 +72,6 @@ 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") {
     return [
       { label: MAIN_STEP_LABELS.save, state: "completed" },
@@ -91,6 +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/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/components/floating-action-buttons.tsx
index d185180cc..b2e5fec40 100644
--- 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
@@ -41,7 +41,7 @@ import {
   buildSupplementReqPayload,
   buildTechReviewReplyPayload,
   toSplmntDmndSaveItem,
-} from "../../lib/save-payload-utils";
+} from "../../lib/payload-utils";
 import { type ChecklistFormState } from "../../model/view-types";
 import type { TechReviewOpinionSectionHandle } from "../sections/tech-review-opinion-section";
 
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
index b47c27580..f35cab5ff 100644
--- 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
@@ -1,5 +1,7 @@
 "use client";
 
+import { Paperclip } from "lucide-react";
+
 import { formatFileSize } from "@/shared/lib/file-utils";
 import { useDownloadAttachmentByAtflCd } from "@/entities/attach";
 import type {
@@ -19,98 +21,105 @@ 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="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>
+      )}
 
-      <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/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/checklist-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/checklist-section.tsx
index 379bb806a..9bb85272b 100644
--- 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
@@ -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/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
index f8e29462c..506704cdc 100644
--- 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
@@ -2,6 +2,8 @@
 
 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 { Field, FieldLabel, FieldSet } from "@/shared/ui/field";
@@ -334,11 +336,12 @@ 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/ui/sections/tmplnt-form-section.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sections/tmplnt-form-section.tsx
index d600d8701..ca5192a66 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 +4,10 @@ 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 { 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 +225,6 @@ function TmplntFacilityAttachments({
 }: TmplntFacilityAttachmentsProps) {
   const formId = useId();
   const { setValue } = useFormContext<SewerBscPlanRegistFormData>();
-  const { mutate: downloadAttachment } = useDownloadAttachmentByAtflCd();
   const [uploadedFile, setUploadedFile] = useState<UploadedTmplntFile | null>(() =>
     atchFileGroupId && atchFileNm
       ? {
@@ -254,7 +252,6 @@ 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 +312,14 @@ 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>
-                  )}
+                  <span className="text-xl">{displayFileName}</span>
                   <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
index 49eb91bfb..372f6cb60 100644
--- 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
@@ -245,6 +245,10 @@ function TmplntSection({ tmplntList, det, dtl }: TmplntSectionProps) {
                 <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>
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 fb5b1860e..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>({
@@ -140,11 +142,21 @@ 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 result = await submitForm(data, "LE");
@@ -237,12 +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-view-page.tsx b/apps/as/src/pages/sewer-bsc-plan/ui/sewer-bsc-plan-view-page.tsx
index 981d5d233..293d31bd8 100644
--- 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
@@ -11,7 +11,6 @@ import { Skeleton } from "@common/components";
 
 import { needsRoleUser01AtrzResolve } from "../lib/button-config";
 import { getEditableReviewStep } from "../lib/review-step-utils";
-import { SEWER_BSC_PLAN_DOC_SE_COM_CD } from "../lib/sewer-bsc-plan-regist-schema";
 import { EMPTY_CKLST_RESULT_LIST, useChecklistFormState } from "../lib/use-checklist-form-state";
 
 import { FloatingActionButtons } from "./components/floating-action-buttons";
@@ -121,7 +120,7 @@ function SewerBscPlanViewPage({ id, propChgCycl }: SewerBscPlanViewPageProps) {
       />
       <FloatingActionButtons
         data={data}
-        docSeComCd={SEWER_BSC_PLAN_DOC_SE_COM_CD}
+        docSeComCd="SEWER"
         sewerBscPlanDocNo={detDto.sewerBscPlanDocNo}
         chgCycl={chgCycl}
         prgrsSttsComCd={detDto.prgrsSttsComCd || ""}
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/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/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/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">