diff --git a/app/Http/Requests/Client/ClientStoreRequest.php b/app/Http/Requests/Client/ClientStoreRequest.php
index 09aa304..5802183 100644
--- a/app/Http/Requests/Client/ClientStoreRequest.php
+++ b/app/Http/Requests/Client/ClientStoreRequest.php
@@ -65,7 +65,7 @@ public function rules(): array
             'mobile' => 'nullable|string|max:20',
             'fax' => 'nullable|string|max:20',
             'email' => 'nullable|email|max:100',
-            'address' => 'nullable|string|max:255',
+            'address' => 'nullable|string|max:500',
             // 담당자 정보
             'manager_name' => 'nullable|string|max:50',
             'manager_tel' => 'nullable|string|max:20',
diff --git a/app/Http/Requests/Client/ClientUpdateRequest.php b/app/Http/Requests/Client/ClientUpdateRequest.php
index 98c90ed..9c7d2a8 100644
--- a/app/Http/Requests/Client/ClientUpdateRequest.php
+++ b/app/Http/Requests/Client/ClientUpdateRequest.php
@@ -65,7 +65,7 @@ public function rules(): array
             'mobile' => 'nullable|string|max:20',
             'fax' => 'nullable|string|max:20',
             'email' => 'nullable|email|max:100',
-            'address' => 'nullable|string|max:255',
+            'address' => 'nullable|string|max:500',
             // 담당자 정보
             'manager_name' => 'nullable|string|max:50',
             'manager_tel' => 'nullable|string|max:20',
diff --git a/app/Http/Requests/SiteBriefing/StoreSiteBriefingRequest.php b/app/Http/Requests/SiteBriefing/StoreSiteBriefingRequest.php
index f5985af..a94bf0c 100644
--- a/app/Http/Requests/SiteBriefing/StoreSiteBriefingRequest.php
+++ b/app/Http/Requests/SiteBriefing/StoreSiteBriefingRequest.php
@@ -29,7 +29,7 @@ public function rules(): array
             'briefing_time' => 'nullable|string|max:10',
             'briefing_type' => ['nullable', 'string', Rule::in(SiteBriefing::TYPES)],
             'location' => 'nullable|string|max:200',
-            'address' => 'nullable|string|max:255',
+            'address' => 'nullable|string|max:500',
 
             // 상태 정보
             'status' => ['nullable', 'string', Rule::in(SiteBriefing::STATUSES)],
diff --git a/app/Http/Requests/SiteBriefing/UpdateSiteBriefingRequest.php b/app/Http/Requests/SiteBriefing/UpdateSiteBriefingRequest.php
index 0e26378..6e6a0a8 100644
--- a/app/Http/Requests/SiteBriefing/UpdateSiteBriefingRequest.php
+++ b/app/Http/Requests/SiteBriefing/UpdateSiteBriefingRequest.php
@@ -29,7 +29,7 @@ public function rules(): array
             'briefing_time' => 'nullable|string|max:10',
             'briefing_type' => ['nullable', 'string', Rule::in(SiteBriefing::TYPES)],
             'location' => 'nullable|string|max:200',
-            'address' => 'nullable|string|max:255',
+            'address' => 'nullable|string|max:500',
 
             // 상태 정보
             'status' => ['nullable', 'string', Rule::in(SiteBriefing::STATUSES)],
diff --git a/app/Http/Requests/Tenant/TenantStoreRequest.php b/app/Http/Requests/Tenant/TenantStoreRequest.php
index c3a98c4..7fb8a9b 100644
--- a/app/Http/Requests/Tenant/TenantStoreRequest.php
+++ b/app/Http/Requests/Tenant/TenantStoreRequest.php
@@ -17,7 +17,7 @@ public function rules(): array
             'company_name' => 'required|string|max:100',
             'email' => 'nullable|email|max:100',
             'phone' => 'nullable|string|max:20',
-            'address' => 'nullable|string|max:255',
+            'address' => 'nullable|string|max:500',
             'business_num' => 'nullable|string|max:20',
             'ceo_name' => 'nullable|string|max:100',
         ];
diff --git a/app/Http/Requests/Tenant/TenantUpdateRequest.php b/app/Http/Requests/Tenant/TenantUpdateRequest.php
index 2893181..8503165 100644
--- a/app/Http/Requests/Tenant/TenantUpdateRequest.php
+++ b/app/Http/Requests/Tenant/TenantUpdateRequest.php
@@ -18,7 +18,7 @@ public function rules(): array
             'company_name' => 'sometimes|string|max:100',
             'email' => 'nullable|email|max:100',
             'phone' => 'nullable|string|max:20',
-            'address' => 'nullable|string|max:255',
+            'address' => 'nullable|string|max:500',
             'business_num' => 'nullable|string|max:20',
             'ceo_name' => 'nullable|string|max:100',
             'logo' => 'nullable|string|max:255',
diff --git a/app/Http/Requests/V1/Site/StoreSiteRequest.php b/app/Http/Requests/V1/Site/StoreSiteRequest.php
index 2d51326..fd1cd30 100644
--- a/app/Http/Requests/V1/Site/StoreSiteRequest.php
+++ b/app/Http/Requests/V1/Site/StoreSiteRequest.php
@@ -15,7 +15,7 @@ public function rules(): array
     {
         return [
             'name' => ['required', 'string', 'max:100'],
-            'address' => ['nullable', 'string', 'max:255'],
+            'address' => ['nullable', 'string', 'max:500'],
             'latitude' => ['nullable', 'numeric', 'between:-90,90'],
             'longitude' => ['nullable', 'numeric', 'between:-180,180'],
             'is_active' => ['sometimes', 'boolean'],
diff --git a/app/Http/Requests/V1/Site/UpdateSiteRequest.php b/app/Http/Requests/V1/Site/UpdateSiteRequest.php
index 91b6196..1501803 100644
--- a/app/Http/Requests/V1/Site/UpdateSiteRequest.php
+++ b/app/Http/Requests/V1/Site/UpdateSiteRequest.php
@@ -15,7 +15,7 @@ public function rules(): array
     {
         return [
             'name' => ['sometimes', 'string', 'max:100'],
-            'address' => ['nullable', 'string', 'max:255'],
+            'address' => ['nullable', 'string', 'max:500'],
             'latitude' => ['nullable', 'numeric', 'between:-90,90'],
             'longitude' => ['nullable', 'numeric', 'between:-180,180'],
             'is_active' => ['sometimes', 'boolean'],
diff --git a/database/migrations/2026_03_04_112800_extend_address_columns_to_500.php b/database/migrations/2026_03_04_112800_extend_address_columns_to_500.php
new file mode 100644
index 0000000..9798d85
--- /dev/null
+++ b/database/migrations/2026_03_04_112800_extend_address_columns_to_500.php
@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        $tables = ['clients', 'tenants', 'site_briefings', 'sites'];
+
+        foreach ($tables as $table) {
+            if (Schema::hasColumn($table, 'address')) {
+                Schema::table($table, function (Blueprint $t) {
+                    $t->string('address', 500)->nullable()->change();
+                });
+            }
+        }
+    }
+
+    public function down(): void
+    {
+        $tables = ['clients', 'tenants', 'site_briefings', 'sites'];
+
+        foreach ($tables as $table) {
+            if (Schema::hasColumn($table, 'address')) {
+                Schema::table($table, function (Blueprint $t) {
+                    $t->string('address', 255)->nullable()->change();
+                });
+            }
+        }
+    }
+};