diff --git a/apps/as/src/entities/sewer-bsc-plan/api/queries.ts b/apps/as/src/entities/sewer-bsc-plan/api/queries.ts
new file mode 100644
index 000000000..063e1bd00
--- /dev/null
+++ b/apps/as/src/entities/sewer-bsc-plan/api/queries.ts
@@ -0,0 +1,138 @@
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+
+import { ENDPOINT } from "@/shared/config";
+
+import type {
+  SewerBscPlanApplySaveRequestDto,
+  SewerBscPlanSaveRequestDto,
+  SewerBscPlanSearchRequestDto,
+  SewerBscPlanUpdateRequestDto,
+} from "../model/sewer-bsc-plan-interface";
+
+import { sewerBscPlanService } from "./sewer-bsc-plan-service";
+
+export const sewerBscPlanBaseKey = [ENDPOINT.AS_SERVICE.SEWER_BSC_PLAN] as const;
+
+export function useSewerBscPlanPage(params: SewerBscPlanSearchRequestDto) {
+  return useQuery({
+    queryKey: [...sewerBscPlanBaseKey, "findPage", params],
+    queryFn: () => sewerBscPlanService.findPage(params),
+  });
+}
+
+export function useSewerBscPlan(sewerBscPlanDocNo: string | null | undefined) {
+  return useQuery({
+    queryKey: [...sewerBscPlanBaseKey, "findById", sewerBscPlanDocNo],
+    queryFn: () => sewerBscPlanService.findById(sewerBscPlanDocNo!),
+    enabled: Boolean(sewerBscPlanDocNo),
+  });
+}
+
+export function useSewerBscPlanDetails(
+  sewerBscPlanDocNo: string | null | undefined,
+  chgCycl: number | null | undefined,
+) {
+  return useQuery({
+    queryKey: [...sewerBscPlanBaseKey, "findDetails", sewerBscPlanDocNo, chgCycl],
+    queryFn: () => sewerBscPlanService.findDetails(sewerBscPlanDocNo!, chgCycl!),
+    enabled: Boolean(sewerBscPlanDocNo) && chgCycl != null,
+  });
+}
+
+export function useSaveSewerBscPlan() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (body: SewerBscPlanSaveRequestDto) => sewerBscPlanService.save(body),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+    },
+  });
+}
+
+export function useUpdateSewerBscPlan() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({
+      sewerBscPlanDocNo,
+      body,
+    }: {
+      sewerBscPlanDocNo: string;
+      body: SewerBscPlanUpdateRequestDto;
+    }) => sewerBscPlanService.update(sewerBscPlanDocNo, body),
+    onSuccess: (_data, { sewerBscPlanDocNo }) => {
+      queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+      queryClient.invalidateQueries({
+        queryKey: [...sewerBscPlanBaseKey, "findById", sewerBscPlanDocNo],
+      });
+    },
+  });
+}
+
+export function useDeleteSewerBscPlan() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (sewerBscPlanDocNo: string) => sewerBscPlanService.delete(sewerBscPlanDocNo),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+    },
+  });
+}
+
+export function useSaveApplySewerBscPlan() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (body: SewerBscPlanApplySaveRequestDto) => sewerBscPlanService.saveApply(body),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+    },
+  });
+}
+
+export function useSubmitSupplementSewerBscPlan() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, body }: { id: string; body: SewerBscPlanApplySaveRequestDto }) =>
+      sewerBscPlanService.submitSupplement(id, body),
+    onSuccess: (_data, { id }) => {
+      queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+      queryClient.invalidateQueries({
+        queryKey: [...sewerBscPlanBaseKey, "findById", id],
+      });
+    },
+  });
+}
+
+export function useSubmitReqSupplementSewerBscPlan() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({
+      id,
+      chgCycl,
+      body,
+    }: {
+      id: string;
+      chgCycl: number;
+      body: SewerBscPlanApplySaveRequestDto;
+    }) => sewerBscPlanService.submitReqSupplement(id, chgCycl, body),
+    onSuccess: (_data, { id }) => {
+      queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+      queryClient.invalidateQueries({
+        queryKey: [...sewerBscPlanBaseKey, "findById", id],
+      });
+    },
+  });
+}
+
+export function useTechReviewSewerBscPlan() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: ({ id, body }: { id: string; body: SewerBscPlanApplySaveRequestDto }) =>
+      sewerBscPlanService.techReview(id, body),
+    onSuccess: (_data, { id }) => {
+      queryClient.invalidateQueries({ queryKey: sewerBscPlanBaseKey });
+      queryClient.invalidateQueries({
+        queryKey: [...sewerBscPlanBaseKey, "findById", id],
+      });
+    },
+  });
+}
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
new file mode 100644
index 000000000..eab17428e
--- /dev/null
+++ b/apps/as/src/entities/sewer-bsc-plan/api/sewer-bsc-plan-service.ts
@@ -0,0 +1,95 @@
+import { client } from "@/shared/api";
+import { ENDPOINT } from "@/shared/config";
+import type { PageResponse } from "@/shared/model";
+
+import type {
+  SewerBscPlanApplySaveRequestDto,
+  SewerBscPlanDetResponseDto,
+  SewerBscPlanResponseDto,
+  SewerBscPlanSaveRequestDto,
+  SewerBscPlanSearchRequestDto,
+  SewerBscPlanService,
+  SewerBscPlanUpdateRequestDto,
+} from "../model/sewer-bsc-plan-interface";
+
+const BASE = ENDPOINT.AS_SERVICE.SEWER_BSC_PLAN;
+
+async function findPage(
+  params: SewerBscPlanSearchRequestDto,
+): Promise<PageResponse<SewerBscPlanResponseDto>> {
+  const response = await client.get<PageResponse<SewerBscPlanResponseDto>>(BASE, {
+    params,
+  });
+  return response.data;
+}
+
+async function findById(sewerBscPlanDocNo: string): Promise<SewerBscPlanResponseDto> {
+  const response = await client.get<SewerBscPlanResponseDto>(`${BASE}/${sewerBscPlanDocNo}`);
+  return response.data;
+}
+
+async function save(body: SewerBscPlanSaveRequestDto): Promise<SewerBscPlanResponseDto> {
+  const response = await client.post<SewerBscPlanResponseDto>(BASE, body);
+  return response.data;
+}
+
+async function update(
+  sewerBscPlanDocNo: string,
+  body: SewerBscPlanUpdateRequestDto,
+): Promise<SewerBscPlanResponseDto> {
+  const response = await client.put<SewerBscPlanResponseDto>(`${BASE}/${sewerBscPlanDocNo}`, body);
+  return response.data;
+}
+
+async function deleteFn(sewerBscPlanDocNo: string): Promise<void> {
+  await client.delete<void>(`${BASE}/${sewerBscPlanDocNo}`);
+}
+
+async function saveApply(body: SewerBscPlanApplySaveRequestDto): Promise<string> {
+  const response = await client.post<string>(`${BASE}/save-apply`, body);
+  return response.data;
+}
+
+async function findDetails(
+  sewerBscPlanDocNo: string,
+  chgCycl: number,
+): Promise<SewerBscPlanDetResponseDto> {
+  const response = await client.get<SewerBscPlanDetResponseDto>(
+    `${BASE}/${sewerBscPlanDocNo}/dtl/${chgCycl}`,
+  );
+  return response.data;
+}
+
+async function submitSupplement(
+  id: string,
+  body: SewerBscPlanApplySaveRequestDto,
+): Promise<string> {
+  const response = await client.post<string>(`${BASE}/${id}/submitsupplement`, body);
+  return response.data;
+}
+
+async function submitReqSupplement(
+  id: string,
+  chgCycl: number,
+  body: SewerBscPlanApplySaveRequestDto,
+): Promise<string> {
+  const response = await client.post<string>(`${BASE}/${id}/${chgCycl}/reqsupplement`, body);
+  return response.data;
+}
+
+async function techReview(id: string, body: SewerBscPlanApplySaveRequestDto): Promise<void> {
+  await client.post<void>(`${BASE}/${id}/tech-review`, body);
+}
+
+export const sewerBscPlanService = {
+  findPage,
+  findById,
+  save,
+  update,
+  delete: deleteFn,
+  saveApply,
+  findDetails,
+  submitSupplement,
+  submitReqSupplement,
+  techReview,
+} satisfies SewerBscPlanService;
diff --git a/apps/as/src/entities/sewer-bsc-plan/index.ts b/apps/as/src/entities/sewer-bsc-plan/index.ts
new file mode 100644
index 000000000..08dec87a7
--- /dev/null
+++ b/apps/as/src/entities/sewer-bsc-plan/index.ts
@@ -0,0 +1,46 @@
+export { sewerBscPlanBaseKey } from "./api/queries";
+export {
+  useDeleteSewerBscPlan,
+  useSaveApplySewerBscPlan,
+  useSaveSewerBscPlan,
+  useSewerBscPlan,
+  useSewerBscPlanDetails,
+  useSewerBscPlanPage,
+  useSubmitReqSupplementSewerBscPlan,
+  useSubmitSupplementSewerBscPlan,
+  useTechReviewSewerBscPlan,
+  useUpdateSewerBscPlan,
+} from "./api/queries";
+export { sewerBscPlanService } from "./api/sewer-bsc-plan-service";
+export type {
+  AtflMngClientResponseDto,
+  CklstResultItem,
+  CklstRvwRsltTreeDto,
+  EsntlAtchFileItem,
+  EsntlAtchFileMngTreeResponseDto,
+  SewerBscPlanApplySaveRequestDto,
+  SewerBscPlanBizCstItem,
+  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-interface.ts b/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-interface.ts
new file mode 100644
index 000000000..13485f5e4
--- /dev/null
+++ b/apps/as/src/entities/sewer-bsc-plan/model/sewer-bsc-plan-interface.ts
@@ -0,0 +1,345 @@
+import type {
+  AtflMngClientResponseDto,
+  CklstResultSaveBase,
+  CklstRvwRsltTreeDto,
+  EsntlAtchFileMngTreeResponseDto,
+  EsntlAtchFileSaveBase,
+  PageableParams,
+  PageResponse,
+  PbadmsApplySaveHeader,
+  RvwOpnnResponseExtension,
+  RvwOpnnSaveBase,
+  SplmntDmndResponseExtension,
+  SplmntDmndSaveBase,
+} from "@/shared/model";
+
+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;
+  envoSeComCd?: string;
+  sewerBscPlanSeComCd?: string;
+  sewerBscPlanNm?: string;
+  taskSeComCd?: string;
+  prgrsSttsComCd?: string;
+}
+
+/** 백엔드 SewerBscPlanSearchRequestDto + Pageable */
+export interface SewerBscPlanSearchRequestDto extends PageableParams {
+  sewerBscPlanDocNo?: string;
+  admdstCd?: string;
+  envoSeComCd?: string;
+  sewerBscPlanSeComCd?: string;
+  sewerBscPlanNm?: string;
+  taskSeComCd?: string;
+}
+
+/** 백엔드 SewerBscPlanResponseDto */
+export interface SewerBscPlanResponseDto {
+  sewerBscPlanDocNo: string;
+  admdstCd?: string;
+  envoSeComCd?: string;
+  envoSeCdNm?: string;
+  sewerBscPlanSeComCd?: string;
+  sewerBscPlanSeCdNm?: string;
+  sewerBscPlanNm?: string;
+  taskSeComCd?: string;
+  taskSeCdNm?: string;
+  prgrsSttsComCd?: string;
+  prgrsSttsCdNm?: string;
+  sido?: string;
+  gugun?: string;
+  chgCycl?: number;
+  regDt?: string;
+  rgtr?: string;
+  rgtrNm?: string;
+  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;
+  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 SewerBscPlanOtlnResponseDto */
+export interface SewerBscPlanOtlnResponseDto {
+  sewerBscPlanDocNo?: string;
+  chgCycl?: number;
+  planStpNo?: number;
+  sewerPlanPpltnCnt?: number;
+  sewerPrcsPpltnCnt?: number;
+  sewerPsplyRt?: number;
+}
+
+/** 백엔드 SewerBscPlanFnrsCstResponseDto */
+export interface SewerBscPlanFnrsCstResponseDto {
+  sewerBscPlanDocNo?: string;
+  chgCycl?: number;
+  planStpNo?: number;
+  gvexpAmt?: number;
+  lcexpAmt?: number;
+  orgprBdchgAmt?: number;
+  etcAmt?: number;
+  sumAmt?: number;
+}
+
+/** 백엔드 SewerBscPlanBizCstResponseDto */
+export interface SewerBscPlanBizCstResponseDto {
+  sewerBscPlanDocNo?: string;
+  chgCycl?: number;
+  planStpNo?: number;
+  acntgSeCd?: string;
+  cstrnAmt?: number;
+}
+
+/** 백엔드 SewerBscPlanSplmntDmndResponseDto */
+export interface SewerBscPlanSplmntDmndResponseDto
+  extends SplmntDmndSaveBase, SplmntDmndResponseExtension {
+  sewerBscPlanDocNo?: string;
+  chgCycl?: number;
+}
+
+/** 백엔드 SewerBscPlanRvwOpnnResponseDto */
+export interface SewerBscPlanRvwOpnnResponseDto extends RvwOpnnSaveBase, RvwOpnnResponseExtension {
+  sewerBscPlanDocNo?: string;
+  chgCycl?: number;
+}
+
+/** 백엔드 SewerBscPlanTmplntDtlResponseDto */
+export interface SewerBscPlanTmplntDtlResponseDto {
+  sewerBscPlanDocNo?: string;
+  chgCycl?: number;
+  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 SewerBscPlanTmplntResponseDto */
+export interface SewerBscPlanTmplntResponseDto {
+  sewerBscPlanDocNo?: string;
+  chgCycl?: number;
+  swtrmtFcltCd?: string;
+  swtrmtFcltNm?: string;
+  atchFileGroupId?: string;
+  atchFileInfo?: AtflMngClientResponseDto;
+  sewerBscPlanTmplntDtlList?: SewerBscPlanTmplntDtlResponseDto[];
+}
+
+/** 백엔드 SewerBscPlanTmplntTmprStrgResponseDto */
+export interface SewerBscPlanTmplntTmprStrgResponseDto {
+  swtrmtFcltCd?: string;
+  rgtr?: string;
+  dtStrgDt?: 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.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 SewerBscPlanDetResponseDto */
+export interface SewerBscPlanDetResponseDto {
+  detDto?: SewerBscPlanResponseDto;
+  activeDtlDto?: SewerBscPlanDtlResponseDto;
+  otlnList?: SewerBscPlanOtlnResponseDto[];
+  cklstResultRows?: CklstRvwRsltTreeDto[];
+  fnrsCstList?: SewerBscPlanFnrsCstResponseDto[];
+  splmntDmndList?: SewerBscPlanSplmntDmndResponseDto[];
+  rvwOpnnList?: SewerBscPlanRvwOpnnResponseDto[];
+  esntlFileList?: EsntlAtchFileMngTreeResponseDto[];
+  etcFileList?: AtflMngClientResponseDto[];
+  bizCstList?: SewerBscPlanBizCstResponseDto[];
+  tmplntList?: SewerBscPlanTmplntResponseDto[];
+  tmplntTmprStrgList?: SewerBscPlanTmplntTmprStrgResponseDto[];
+}
+
+/** Controller public 메서드명·시그니처와 동일 */
+export interface SewerBscPlanService {
+  findPage(params: SewerBscPlanSearchRequestDto): Promise<PageResponse<SewerBscPlanResponseDto>>;
+  findById(sewerBscPlanDocNo: string): Promise<SewerBscPlanResponseDto>;
+  save(body: SewerBscPlanSaveRequestDto): Promise<SewerBscPlanResponseDto>;
+  update(
+    sewerBscPlanDocNo: string,
+    body: SewerBscPlanUpdateRequestDto,
+  ): Promise<SewerBscPlanResponseDto>;
+  delete(sewerBscPlanDocNo: string): Promise<void>;
+  saveApply(body: SewerBscPlanApplySaveRequestDto): Promise<string>;
+  findDetails(sewerBscPlanDocNo: string, chgCycl: number): Promise<SewerBscPlanDetResponseDto>;
+  submitSupplement(id: string, body: SewerBscPlanApplySaveRequestDto): Promise<string>;
+  submitReqSupplement(
+    id: string,
+    chgCycl: number,
+    body: SewerBscPlanApplySaveRequestDto,
+  ): Promise<string>;
+  techReview(id: string, body: SewerBscPlanApplySaveRequestDto): Promise<void>;
+}
diff --git a/apps/as/src/shared/config/api.ts b/apps/as/src/shared/config/api.ts
index 98992a063..ab4c18af8 100644
--- a/apps/as/src/shared/config/api.ts
+++ b/apps/as/src/shared/config/api.ts
@@ -22,6 +22,7 @@ export const ENDPOINT = {
     DESIGN_CNSTN_BIZ_SCL: "/as-service/api/v1/design-cnstn-biz-scl",
     DESIGN_CNSTN_ESNTL_ATCH_FILE: "/as-service/api/v1/design-cnstn-esntl-atch-file",
     DESIGN_CNSTN_RVW_OPNN: "/as-service/api/v1/design-cnstn-rvw-opnn",
+    SEWER_BSC_PLAN: "/as-service/api/v1/sewer-bsc-plans",
   },
   USER_SERVICE: {
     LOGIN: "/user-service/login",