diff --git a/src/components/business/construction/estimates/EstimateListClient.tsx b/src/components/business/construction/estimates/EstimateListClient.tsx
index 3205e59b..ea7b1a43 100644
--- a/src/components/business/construction/estimates/EstimateListClient.tsx
+++ b/src/components/business/construction/estimates/EstimateListClient.tsx
@@ -104,7 +104,7 @@ export default function EstimateListClient({ initialData = [], initialStats }: E
     try {
       const [listResult, statsResult] = await Promise.all([
         getEstimateList({
-          size: 1000,
+          size: 100, // API 최대값 100
           startDate: startDate || undefined,
           endDate: endDate || undefined,
         }),
diff --git a/src/components/business/construction/estimates/actions.ts b/src/components/business/construction/estimates/actions.ts
index 252afada..719197b1 100644
--- a/src/components/business/construction/estimates/actions.ts
+++ b/src/components/business/construction/estimates/actions.ts
@@ -17,47 +17,73 @@ import type {
 import { apiClient } from '@/lib/api';
 
 /**
- * 주일 기업 - 견적관리 Server Actions
- * 표준화된 apiClient 사용 버전
+ * 건설 프로젝트 - 견적관리 Server Actions
+ * quotes API 사용 (quote_type=construction 필터)
  */
 
 // ========================================
-// API 응답 타입
+// API 응답 타입 (Quotes API)
 // ========================================
 
-interface ApiEstimate {
+interface ApiQuote {
   id: number;
-  estimate_code: string;
-  partner_id: number | null;
-  partner_name: string | null;
-  project_name: string;
-  estimator_id: number | null;
-  estimator_name: string | null;
-  item_count: number;
-  estimate_amount: number;
-  completed_date: string | null;
-  bid_date: string | null;
-  status: 'pending' | 'approval_waiting' | 'completed' | 'rejected' | 'hold';
+  quote_type: string;
+  quote_number: string;
+  registration_date: string;
+  client_id: number | null;
+  client_name: string | null;
+  site_id: number | null;
+  site_name: string | null;
+  site_briefing_id: number | null;
+  product_category: string | null;
+  product_name: string | null;
+  total_amount: number | string;
+  status: string;
+  author: string | null;
+  manager: string | null;
+  remarks: string | null;
   created_at: string;
   updated_at: string;
-  created_by: string | null;
+  created_by: number | null;
+  // 연관 데이터
+  items?: ApiQuoteItem[];
+  site_briefing?: ApiSiteBriefing;
 }
 
-interface ApiEstimateStats {
+interface ApiQuoteItem {
+  id: number;
+  item_code: string;
+  item_name: string;
+  specification: string | null;
+  unit: string;
+  base_quantity: number;
+  calculated_quantity: number;
+  unit_price: number;
+  total_price: number;
+  formula: string | null;
+  note: string | null;
+  sort_order: number;
+}
+
+interface ApiSiteBriefing {
+  id: number;
+  briefing_code: string;
+  title: string;
+  briefing_date: string;
+  attendance_status: string;
+  partner?: {
+    id: number;
+    name: string;
+  };
+}
+
+interface ApiQuoteStats {
   total_count: number;
   pending_count: number;
   completed_count: number;
 }
 
-interface ApiEstimateDetail extends ApiEstimate {
-  site_briefing?: ApiSiteBriefingInfo;
-  bid_info?: ApiBidInfo;
-  summary_items?: ApiSummaryItem[];
-  expense_items?: ApiExpenseItem[];
-  price_adjustments?: ApiPriceAdjustmentItem[];
-  detail_items?: ApiDetailItem[];
-}
-
+// Legacy API types (for backward compatibility)
 interface ApiSiteBriefingInfo {
   briefing_code: string;
   partner_name: string;
@@ -85,202 +111,116 @@ interface ApiBidDocument {
   file_size: number;
 }
 
-interface ApiSummaryItem {
-  id: number;
-  name: string;
-  quantity: number;
-  unit: string;
-  material_cost: number;
-  labor_cost: number;
-  total_cost: number;
-  remarks: string;
-}
-
-interface ApiExpenseItem {
-  id: number;
-  name: string;
-  amount: number;
-  selected: boolean;
-}
-
-interface ApiPriceAdjustmentItem {
-  id: number;
-  category: string;
-  unit_price: number;
-  coating: number;
-  batting: number;
-  box_reinforce: number;
-  painting: number;
-  total: number;
-}
-
-interface ApiDetailItem {
-  id: number;
-  no: number;
-  name: string;
-  material: string;
-  width: number;
-  height: number;
-  quantity: number;
-  box: number;
-  assembly: number;
-  coating: number;
-  batting: number;
-  mounting: number;
-  fitting: number;
-  controller: number;
-  width_construction: number;
-  height_construction: number;
-  material_cost: number;
-  labor_cost: number;
-  quantity_price: number;
-  expense_quantity: number;
-  expense_total: number;
-  total_cost: number;
-  other_cost: number;
-  margin_cost: number;
-  total_price: number;
-  unit_price: number;
-  expense: number;
-  margin_rate: number;
-  unit_quantity: number;
-  expense_result: number;
-  margin_actual: number;
-}
-
 // ========================================
 // 타입 변환 함수
 // ========================================
 
 /**
- * API 응답 → Estimate 타입 변환
+ * API 응답 (Quote) → Estimate 타입 변환
+ * 기존 프론트엔드 타입과 호환성 유지
  */
-function transformEstimate(apiData: ApiEstimate): Estimate {
+function transformQuoteToEstimate(apiData: ApiQuote): Estimate {
   return {
     id: String(apiData.id),
-    estimateCode: apiData.estimate_code || '',
-    partnerId: apiData.partner_id ? String(apiData.partner_id) : '',
-    partnerName: apiData.partner_name || '',
-    projectName: apiData.project_name || '',
-    estimatorId: apiData.estimator_id ? String(apiData.estimator_id) : '',
-    estimatorName: apiData.estimator_name || '',
-    itemCount: apiData.item_count || 0,
-    estimateAmount: apiData.estimate_amount || 0,
-    completedDate: apiData.completed_date || null,
-    bidDate: apiData.bid_date || null,
-    status: apiData.status || 'pending',
+    estimateCode: apiData.quote_number || '',
+    partnerId: apiData.client_id ? String(apiData.client_id) : '',
+    partnerName: apiData.client_name || '',
+    projectName: apiData.site_name || '',
+    estimatorId: apiData.created_by ? String(apiData.created_by) : '',
+    estimatorName: apiData.author || '',
+    itemCount: apiData.items?.length || 0,
+    estimateAmount: Number(apiData.total_amount) || 0,
+    completedDate: null,
+    bidDate: apiData.registration_date || null,
+    status: mapQuoteStatusToEstimateStatus(apiData.status),
     createdAt: apiData.created_at || '',
     updatedAt: apiData.updated_at || '',
-    createdBy: apiData.created_by || '',
+    createdBy: apiData.created_by ? String(apiData.created_by) : '',
   };
 }
 
+/**
+ * Quote 상태 → Estimate 상태 매핑
+ */
+function mapQuoteStatusToEstimateStatus(
+  quoteStatus: string
+): 'pending' | 'approval_waiting' | 'completed' | 'rejected' | 'hold' {
+  const statusMap: Record<string, 'pending' | 'approval_waiting' | 'completed' | 'rejected' | 'hold'> = {
+    pending: 'pending',
+    draft: 'pending',
+    sent: 'approval_waiting',
+    approved: 'completed',
+    rejected: 'rejected',
+    finalized: 'completed',
+    converted: 'completed',
+  };
+  return statusMap[quoteStatus] || 'pending';
+}
+
 /**
  * API 응답 → EstimateDetail 타입 변환
  */
-function transformEstimateDetail(apiData: ApiEstimateDetail): EstimateDetail {
-  const base = transformEstimate(apiData);
+function transformQuoteToEstimateDetail(apiData: ApiQuote): EstimateDetail {
+  const base = transformQuoteToEstimate(apiData);
 
   const siteBriefing: SiteBriefingInfo = apiData.site_briefing
     ? {
         briefingCode: apiData.site_briefing.briefing_code || '',
-        partnerName: apiData.site_briefing.partner_name || '',
-        companyName: apiData.site_briefing.company_name || '',
+        partnerName: apiData.site_briefing.partner?.name || '',
+        companyName: '',
         briefingDate: apiData.site_briefing.briefing_date || '',
-        attendee: apiData.site_briefing.attendee || '',
+        attendee: '',
       }
     : { briefingCode: '', partnerName: '', companyName: '', briefingDate: '', attendee: '' };
 
-  const bidInfo: BidInfo = apiData.bid_info
-    ? {
-        projectName: apiData.bid_info.project_name || '',
-        bidDate: apiData.bid_info.bid_date || '',
-        siteCount: apiData.bid_info.site_count || 0,
-        constructionPeriod: apiData.bid_info.construction_period || '',
-        constructionStartDate: apiData.bid_info.construction_start_date || '',
-        constructionEndDate: apiData.bid_info.construction_end_date || '',
-        vatType: apiData.bid_info.vat_type || 'excluded',
-        workReport: apiData.bid_info.work_report || '',
-        documents: (apiData.bid_info.documents || []).map((d) => ({
-          id: String(d.id),
-          fileName: d.file_name || '',
-          fileUrl: d.file_url || '',
-          fileSize: d.file_size || 0,
-        })),
-      }
-    : {
-        projectName: '',
-        bidDate: '',
-        siteCount: 0,
-        constructionPeriod: '',
-        constructionStartDate: '',
-        constructionEndDate: '',
-        vatType: 'excluded',
-        workReport: '',
-        documents: [],
-      };
+  const bidInfo: BidInfo = {
+    projectName: apiData.site_name || '',
+    bidDate: apiData.registration_date || '',
+    siteCount: 0,
+    constructionPeriod: '',
+    constructionStartDate: '',
+    constructionEndDate: '',
+    vatType: 'excluded',
+    workReport: '',
+    documents: [],
+  };
 
-  const summaryItems: EstimateSummaryItem[] = (apiData.summary_items || []).map((item) => ({
-    id: String(item.id),
-    name: item.name || '',
-    quantity: item.quantity || 0,
-    unit: item.unit || '',
-    materialCost: item.material_cost || 0,
-    laborCost: item.labor_cost || 0,
-    totalCost: item.total_cost || 0,
-    remarks: item.remarks || '',
-  }));
+  const summaryItems: EstimateSummaryItem[] = [];
+  const expenseItems: ExpenseItem[] = [];
+  const priceAdjustments: PriceAdjustmentItem[] = [];
 
-  const expenseItems: ExpenseItem[] = (apiData.expense_items || []).map((item) => ({
+  const detailItems: EstimateDetailItem[] = (apiData.items || []).map((item, index) => ({
     id: String(item.id),
-    name: item.name || '',
-    amount: item.amount || 0,
-    selected: item.selected || false,
-  }));
-
-  const priceAdjustments: PriceAdjustmentItem[] = (apiData.price_adjustments || []).map((item) => ({
-    id: String(item.id),
-    category: item.category || '',
-    unitPrice: item.unit_price || 0,
-    coating: item.coating || 0,
-    batting: item.batting || 0,
-    boxReinforce: item.box_reinforce || 0,
-    painting: item.painting || 0,
-    total: item.total || 0,
-  }));
-
-  const detailItems: EstimateDetailItem[] = (apiData.detail_items || []).map((item) => ({
-    id: String(item.id),
-    no: item.no || 0,
-    name: item.name || '',
-    material: item.material || '',
-    width: item.width || 0,
-    height: item.height || 0,
-    quantity: item.quantity || 0,
-    box: item.box || 0,
-    assembly: item.assembly || 0,
-    coating: item.coating || 0,
-    batting: item.batting || 0,
-    mounting: item.mounting || 0,
-    fitting: item.fitting || 0,
-    controller: item.controller || 0,
-    widthConstruction: item.width_construction || 0,
-    heightConstruction: item.height_construction || 0,
-    materialCost: item.material_cost || 0,
-    laborCost: item.labor_cost || 0,
-    quantityPrice: item.quantity_price || 0,
-    expenseQuantity: item.expense_quantity || 0,
-    expenseTotal: item.expense_total || 0,
-    totalCost: item.total_cost || 0,
-    otherCost: item.other_cost || 0,
-    marginCost: item.margin_cost || 0,
+    no: index + 1,
+    name: item.item_name || '',
+    material: item.specification || '',
+    width: 0,
+    height: 0,
+    quantity: item.calculated_quantity || 0,
+    box: 0,
+    assembly: 0,
+    coating: 0,
+    batting: 0,
+    mounting: 0,
+    fitting: 0,
+    controller: 0,
+    widthConstruction: 0,
+    heightConstruction: 0,
+    materialCost: 0,
+    laborCost: 0,
+    quantityPrice: item.unit_price || 0,
+    expenseQuantity: 0,
+    expenseTotal: 0,
+    totalCost: item.total_price || 0,
+    otherCost: 0,
+    marginCost: 0,
     totalPrice: item.total_price || 0,
     unitPrice: item.unit_price || 0,
-    expense: item.expense || 0,
-    marginRate: item.margin_rate || 0,
-    unitQuantity: item.unit_quantity || 0,
-    expenseResult: item.expense_result || 0,
-    marginActual: item.margin_actual || 0,
+    expense: 0,
+    marginRate: 0,
+    unitQuantity: item.base_quantity || 0,
+    expenseResult: 0,
+    marginActual: 0,
   }));
 
   return {
@@ -300,45 +240,37 @@ function transformEstimateDetail(apiData: ApiEstimateDetail): EstimateDetail {
 function transformToApiRequest(data: Partial<EstimateDetailFormData>): Record<string, unknown> {
   const apiData: Record<string, unknown> = {};
 
-  if (data.estimateCode !== undefined) apiData.estimate_code = data.estimateCode;
-  if (data.estimatorId !== undefined) apiData.estimator_id = data.estimatorId || null;
-  if (data.estimatorName !== undefined) apiData.estimator_name = data.estimatorName || null;
-  if (data.estimateAmount !== undefined) apiData.estimate_amount = data.estimateAmount;
-  if (data.status !== undefined) apiData.status = data.status;
-
-  if (data.siteBriefing !== undefined) {
-    apiData.site_briefing = {
-      briefing_code: data.siteBriefing.briefingCode,
-      partner_name: data.siteBriefing.partnerName,
-      company_name: data.siteBriefing.companyName,
-      briefing_date: data.siteBriefing.briefingDate,
-      attendee: data.siteBriefing.attendee,
+  if (data.estimateCode !== undefined) apiData.quote_number = data.estimateCode;
+  if (data.estimatorId !== undefined) apiData.created_by = data.estimatorId || null;
+  if (data.estimatorName !== undefined) apiData.author = data.estimatorName || null;
+  if (data.estimateAmount !== undefined) apiData.total_amount = data.estimateAmount;
+  if (data.status !== undefined) {
+    // Estimate 상태 → Quote 상태 역매핑
+    const reverseStatusMap: Record<string, string> = {
+      pending: 'pending',
+      approval_waiting: 'sent',
+      completed: 'finalized',
+      rejected: 'rejected',
+      hold: 'draft',
     };
+    apiData.status = reverseStatusMap[data.status] || 'pending';
   }
 
   if (data.bidInfo !== undefined) {
-    apiData.bid_info = {
-      project_name: data.bidInfo.projectName,
-      bid_date: data.bidInfo.bidDate,
-      site_count: data.bidInfo.siteCount,
-      construction_period: data.bidInfo.constructionPeriod,
-      construction_start_date: data.bidInfo.constructionStartDate,
-      construction_end_date: data.bidInfo.constructionEndDate,
-      vat_type: data.bidInfo.vatType,
-      work_report: data.bidInfo.workReport,
-    };
+    apiData.site_name = data.bidInfo.projectName;
+    apiData.registration_date = data.bidInfo.bidDate;
   }
 
   return apiData;
 }
 
 // ========================================
-// API 함수
+// API 함수 (quotes API 사용)
 // ========================================
 
 /**
- * 견적 목록 조회
- * GET /api/v1/estimates
+ * 건설 견적 목록 조회
+ * GET /api/v1/quotes?quote_type=construction
  */
 export async function getEstimateList(filter?: EstimateFilter): Promise<{
   success: boolean;
@@ -346,62 +278,77 @@ export async function getEstimateList(filter?: EstimateFilter): Promise<{
   error?: string;
 }> {
   try {
-    const queryParams: Record<string, string> = {};
+    const queryParams: Record<string, string> = {
+      quote_type: 'construction', // 건설 견적만 조회
+    };
 
     // 검색
-    if (filter?.search) queryParams.search = filter.search;
+    if (filter?.search) queryParams.q = filter.search;
 
     // 필터
-    if (filter?.status && filter.status !== 'all') queryParams.status = filter.status;
-    if (filter?.partnerId) queryParams.partner_id = filter.partnerId;
-    if (filter?.estimatorId) queryParams.estimator_id = filter.estimatorId;
+    if (filter?.status && filter.status !== 'all') {
+      // Estimate 상태 → Quote 상태로 변환
+      const statusMap: Record<string, string> = {
+        pending: 'pending',
+        approval_waiting: 'sent',
+        completed: 'finalized',
+        rejected: 'rejected',
+        hold: 'draft',
+      };
+      queryParams.status = statusMap[filter.status] || filter.status;
+    }
+    if (filter?.partnerId) queryParams.client_id = filter.partnerId;
 
     // 날짜 범위
-    if (filter?.startDate) queryParams.start_date = filter.startDate;
-    if (filter?.endDate) queryParams.end_date = filter.endDate;
+    if (filter?.startDate) queryParams.date_from = filter.startDate;
+    if (filter?.endDate) queryParams.date_to = filter.endDate;
 
     // 페이지네이션
     if (filter?.page) queryParams.page = String(filter.page);
-    if (filter?.size) queryParams.per_page = String(filter.size);
+    if (filter?.size) queryParams.size = String(filter.size);
 
     // 정렬
     if (filter?.sortBy) {
       const sortMap: Record<string, { field: string; dir: string }> = {
         latest: { field: 'created_at', dir: 'desc' },
         oldest: { field: 'created_at', dir: 'asc' },
-        amountDesc: { field: 'estimate_amount', dir: 'desc' },
-        amountAsc: { field: 'estimate_amount', dir: 'asc' },
-        bidDateDesc: { field: 'bid_date', dir: 'desc' },
-        partnerNameAsc: { field: 'partner_name', dir: 'asc' },
-        partnerNameDesc: { field: 'partner_name', dir: 'desc' },
-        projectNameAsc: { field: 'project_name', dir: 'asc' },
-        projectNameDesc: { field: 'project_name', dir: 'desc' },
+        amountDesc: { field: 'total_amount', dir: 'desc' },
+        amountAsc: { field: 'total_amount', dir: 'asc' },
+        bidDateDesc: { field: 'registration_date', dir: 'desc' },
+        partnerNameAsc: { field: 'client_name', dir: 'asc' },
+        partnerNameDesc: { field: 'client_name', dir: 'desc' },
+        projectNameAsc: { field: 'site_name', dir: 'asc' },
+        projectNameDesc: { field: 'site_name', dir: 'desc' },
       };
       const sort = sortMap[filter.sortBy];
       if (sort) {
         queryParams.sort_by = sort.field;
-        queryParams.sort_dir = sort.dir;
+        queryParams.sort_order = sort.dir;
       }
     }
 
     const response = await apiClient.get<{
-      data: ApiEstimate[];
-      current_page: number;
-      per_page: number;
-      total: number;
-      last_page: number;
-    }>('/estimates', { params: queryParams });
+      success: boolean;
+      data: {
+        data: ApiQuote[];
+        current_page: number;
+        per_page: number;
+        total: number;
+        last_page: number;
+      };
+    }>('/quotes', { params: queryParams });
 
-    const items = (response.data || []).map(transformEstimate);
+    const paginatedData = response.data;
+    const items = (paginatedData.data || []).map(transformQuoteToEstimate);
 
     return {
       success: true,
       data: {
         items,
-        total: response.total || 0,
-        page: response.current_page || 1,
-        size: response.per_page || 20,
-        totalPages: response.last_page || 1,
+        total: paginatedData.total || 0,
+        page: paginatedData.current_page || 1,
+        size: paginatedData.per_page || 20,
+        totalPages: paginatedData.last_page || 1,
       },
     };
   } catch (error) {
@@ -412,7 +359,7 @@ export async function getEstimateList(filter?: EstimateFilter): Promise<{
 
 /**
  * 견적 단건 조회
- * GET /api/v1/estimates/{id}
+ * GET /api/v1/quotes/{id}
  */
 export async function getEstimate(id: string): Promise<{
   success: boolean;
@@ -420,8 +367,8 @@ export async function getEstimate(id: string): Promise<{
   error?: string;
 }> {
   try {
-    const response = await apiClient.get<ApiEstimate>(`/estimates/${id}`);
-    return { success: true, data: transformEstimate(response) };
+    const response = await apiClient.get<{ success: boolean; data: ApiQuote }>(`/quotes/${id}`);
+    return { success: true, data: transformQuoteToEstimate(response.data) };
   } catch (error) {
     console.error('견적 조회 오류:', error);
     return { success: false, error: '견적 정보를 찾을 수 없습니다.' };
@@ -430,7 +377,7 @@ export async function getEstimate(id: string): Promise<{
 
 /**
  * 견적 상세 조회 (첨부 정보 포함)
- * GET /api/v1/estimates/{id}/detail
+ * GET /api/v1/quotes/{id}
  */
 export async function getEstimateDetail(id: string): Promise<{
   success: boolean;
@@ -438,8 +385,8 @@ export async function getEstimateDetail(id: string): Promise<{
   error?: string;
 }> {
   try {
-    const response = await apiClient.get<ApiEstimateDetail>(`/estimates/${id}`);
-    return { success: true, data: transformEstimateDetail(response) };
+    const response = await apiClient.get<{ success: boolean; data: ApiQuote }>(`/quotes/${id}`);
+    return { success: true, data: transformQuoteToEstimateDetail(response.data) };
   } catch (error) {
     console.error('견적 상세 조회 오류:', error);
     return { success: false, error: '견적 상세 정보를 불러오는데 실패했습니다.' };
@@ -448,7 +395,8 @@ export async function getEstimateDetail(id: string): Promise<{
 
 /**
  * 견적 통계 조회
- * GET /api/v1/estimates/stats
+ * GET /api/v1/quotes/stats (건설용)
+ * 현재는 목록 조회로 대체
  */
 export async function getEstimateStats(): Promise<{
   success: boolean;
@@ -456,14 +404,25 @@ export async function getEstimateStats(): Promise<{
   error?: string;
 }> {
   try {
-    const response = await apiClient.get<ApiEstimateStats>('/estimates/stats');
+    // 통계 API가 없으므로 목록 조회로 대체
+    const [allResponse, pendingResponse] = await Promise.all([
+      apiClient.get<{ success: boolean; data: { total: number } }>('/quotes', {
+        params: { quote_type: 'construction', size: '1' },
+      }),
+      apiClient.get<{ success: boolean; data: { total: number } }>('/quotes', {
+        params: { quote_type: 'construction', status: 'pending', size: '1' },
+      }),
+    ]);
+
+    const total = allResponse.data?.total || 0;
+    const pending = pendingResponse.data?.total || 0;
 
     return {
       success: true,
       data: {
-        total: response.total_count || 0,
-        pending: response.pending_count || 0,
-        completed: response.completed_count || 0,
+        total,
+        pending,
+        completed: total - pending,
       },
     };
   } catch (error) {
@@ -474,7 +433,7 @@ export async function getEstimateStats(): Promise<{
 
 /**
  * 견적 등록
- * POST /api/v1/estimates
+ * POST /api/v1/quotes
  */
 export async function createEstimate(data: EstimateDetailFormData): Promise<{
   success: boolean;
@@ -482,9 +441,12 @@ export async function createEstimate(data: EstimateDetailFormData): Promise<{
   error?: string;
 }> {
   try {
-    const apiData = transformToApiRequest(data);
-    const response = await apiClient.post<ApiEstimate>('/estimates', apiData);
-    return { success: true, data: transformEstimate(response) };
+    const apiData = {
+      ...transformToApiRequest(data),
+      quote_type: 'construction', // 건설 견적으로 생성
+    };
+    const response = await apiClient.post<ApiQuote>('/quotes', apiData);
+    return { success: true, data: transformQuoteToEstimate(response) };
   } catch (error) {
     console.error('견적 등록 오류:', error);
     return { success: false, error: '견적 등록에 실패했습니다.' };
@@ -493,7 +455,7 @@ export async function createEstimate(data: EstimateDetailFormData): Promise<{
 
 /**
  * 견적 수정
- * PUT /api/v1/estimates/{id}
+ * PUT /api/v1/quotes/{id}
  */
 export async function updateEstimate(
   id: string,
@@ -505,8 +467,8 @@ export async function updateEstimate(
 }> {
   try {
     const apiData = transformToApiRequest(data);
-    const response = await apiClient.put<ApiEstimate>(`/estimates/${id}`, apiData);
-    return { success: true, data: transformEstimate(response) };
+    const response = await apiClient.put<ApiQuote>(`/quotes/${id}`, apiData);
+    return { success: true, data: transformQuoteToEstimate(response) };
   } catch (error) {
     console.error('견적 수정 오류:', error);
     return { success: false, error: '견적 수정에 실패했습니다.' };
@@ -515,14 +477,14 @@ export async function updateEstimate(
 
 /**
  * 견적 삭제
- * DELETE /api/v1/estimates/{id}
+ * DELETE /api/v1/quotes/{id}
  */
 export async function deleteEstimate(id: string): Promise<{
   success: boolean;
   error?: string;
 }> {
   try {
-    await apiClient.delete(`/estimates/${id}`);
+    await apiClient.delete(`/quotes/${id}`);
     return { success: true };
   } catch (error) {
     console.error('견적 삭제 오류:', error);
@@ -532,7 +494,7 @@ export async function deleteEstimate(id: string): Promise<{
 
 /**
  * 견적 일괄 삭제
- * DELETE /api/v1/estimates/bulk
+ * DELETE /api/v1/quotes/bulk
  */
 export async function deleteEstimates(ids: string[]): Promise<{
   success: boolean;
@@ -540,7 +502,7 @@ export async function deleteEstimates(ids: string[]): Promise<{
   error?: string;
 }> {
   try {
-    await apiClient.delete('/estimates/bulk', {
+    await apiClient.delete('/quotes/bulk', {
       data: { ids: ids.map((id) => Number(id)) },
     });
     return { success: true, deletedCount: ids.length };