diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251114075150_UpdateHouseEntity.Designer.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251114075150_UpdateHouseEntity.Designer.cs
new file mode 100644
index 0000000..7015814
--- /dev/null
+++ b/Hcs.WebApp/Data/Hcs/Migrations/20251114075150_UpdateHouseEntity.Designer.cs
@@ -0,0 +1,252 @@
+// <auto-generated />
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+namespace Hcs.WebApp.Data.Hcs.Migrations
+{
+    [DbContext(typeof(HcsDbContext))]
+    [Migration("20251114075150_UpdateHouseEntity")]
+    public partial class UpdateHouseEntity
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "9.0.9")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Campaign", b =>
+            {
+                b.Property<int>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("int");
+
+                SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                b.Property<DateTime>("CreatedAt")
+                    .HasColumnType("datetime2");
+
+                b.Property<DateTime?>("EndedAt")
+                    .HasColumnType("datetime2");
+
+                b.Property<string>("FailureReason")
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<string>("InitiatorId")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<int>("Progress")
+                    .HasColumnType("int");
+
+                b.Property<DateTime?>("StartedAt")
+                    .HasColumnType("datetime2");
+
+                b.Property<int>("Step")
+                    .HasColumnType("int");
+
+                b.Property<string>("Type")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.HasKey("Id");
+
+                b.ToTable("Campaigns");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.House", b =>
+            {
+                b.Property<int>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("int");
+
+                SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                b.Property<Guid?>("FiasId")
+                    .HasColumnType("uniqueidentifier");
+
+                b.Property<Guid?>("HcsId")
+                    .HasColumnType("uniqueidentifier");
+
+                b.Property<bool>("IsMkd")
+                    .HasColumnType("bit");
+
+                b.Property<bool>("IsZhd")
+                    .HasColumnType("bit");
+
+                b.Property<int?>("LastSyncOperationId")
+                    .HasColumnType("int");
+
+                b.Property<DateTime?>("SyncedAt")
+                    .HasColumnType("datetime2");
+
+                b.Property<string>("ThirdPartyId")
+                    .HasColumnType("nvarchar(max)");
+
+                b.HasKey("Id");
+
+                b.HasIndex("FiasId")
+                    .IsUnique()
+                    .HasFilter("[FiasId] IS NOT NULL");
+
+                b.HasIndex("LastSyncOperationId");
+
+                b.ToTable("Houses");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Operation", b =>
+            {
+                b.Property<int>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("int");
+
+                SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                b.Property<int>("CampaignId")
+                    .HasColumnType("int");
+
+                b.Property<DateTime>("CreatedAt")
+                    .HasColumnType("datetime2");
+
+                b.Property<DateTime?>("EndedAt")
+                    .HasColumnType("datetime2");
+
+                b.Property<string>("FailureReason")
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<string>("MessageGuid")
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<DateTime?>("StartedAt")
+                    .HasColumnType("datetime2");
+
+                b.Property<string>("Type")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.HasKey("Id");
+
+                b.HasIndex("CampaignId");
+
+                b.ToTable("Operations");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
+            {
+                b.Property<Guid>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("uniqueidentifier");
+
+                b.Property<bool>("IsCommon")
+                    .HasColumnType("bit");
+
+                b.Property<int?>("LastSyncOperationId")
+                    .HasColumnType("int");
+
+                b.Property<string>("Name")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<int>("Number")
+                    .HasColumnType("int");
+
+                b.Property<DateTime?>("SyncedAt")
+                    .HasColumnType("datetime2");
+
+                b.HasKey("Id");
+
+                b.HasIndex("LastSyncOperationId");
+
+                b.ToTable("Registries");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
+            {
+                b.Property<Guid>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("uniqueidentifier");
+
+                b.Property<string>("Code")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<string>("GUID")
+                    .IsRequired()
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<string>("Json")
+                    .HasColumnType("nvarchar(max)");
+
+                b.Property<Guid>("RegistryId")
+                    .HasColumnType("uniqueidentifier");
+
+                b.HasKey("Id");
+
+                b.HasIndex("RegistryId");
+
+                b.ToTable("Elements");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.House", b =>
+            {
+                b.HasOne("Hcs.WebApp.Data.Hcs.Operation", "LastSyncOperation")
+                    .WithMany()
+                    .HasForeignKey("LastSyncOperationId");
+
+                b.Navigation("LastSyncOperation");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Operation", b =>
+            {
+                b.HasOne("Hcs.WebApp.Data.Hcs.Campaign", "Campaign")
+                    .WithMany("Operations")
+                    .HasForeignKey("CampaignId")
+                    .OnDelete(DeleteBehavior.Cascade)
+                    .IsRequired();
+
+                b.Navigation("Campaign");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
+            {
+                b.HasOne("Hcs.WebApp.Data.Hcs.Operation", "LastSyncOperation")
+                    .WithMany("Registries")
+                    .HasForeignKey("LastSyncOperationId");
+
+                b.Navigation("LastSyncOperation");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
+            {
+                b.HasOne("Hcs.WebApp.Data.Hcs.Registry", "Registry")
+                    .WithMany("Elements")
+                    .HasForeignKey("RegistryId")
+                    .OnDelete(DeleteBehavior.Cascade)
+                    .IsRequired();
+
+                b.Navigation("Registry");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Campaign", b =>
+            {
+                b.Navigation("Operations");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Operation", b =>
+            {
+                b.Navigation("Registries");
+            });
+
+            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
+            {
+                b.Navigation("Elements");
+            });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251114075150_UpdateHouseEntity.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251114075150_UpdateHouseEntity.cs
new file mode 100644
index 0000000..922f9b1
--- /dev/null
+++ b/Hcs.WebApp/Data/Hcs/Migrations/20251114075150_UpdateHouseEntity.cs
@@ -0,0 +1,84 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+namespace Hcs.WebApp.Data.Hcs.Migrations
+{
+    /// <inheritdoc />
+    public partial class UpdateHouseEntity : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_Houses_FiasId",
+                table: "Houses");
+
+            migrationBuilder.AlterColumn<string>(
+                name: "ThirdPartyId",
+                table: "Houses",
+                type: "nvarchar(max)",
+                nullable: true,
+                oldClrType: typeof(int),
+                oldType: "int");
+
+            migrationBuilder.AlterColumn<Guid>(
+                name: "FiasId",
+                table: "Houses",
+                type: "uniqueidentifier",
+                nullable: true,
+                oldClrType: typeof(Guid),
+                oldType: "uniqueidentifier");
+
+            migrationBuilder.AddColumn<Guid>(
+                name: "HcsId",
+                table: "Houses",
+                type: "uniqueidentifier",
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Houses_FiasId",
+                table: "Houses",
+                column: "FiasId",
+                unique: true,
+                filter: "[FiasId] IS NOT NULL");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_Houses_FiasId",
+                table: "Houses");
+
+            migrationBuilder.DropColumn(
+                name: "HcsId",
+                table: "Houses");
+
+            migrationBuilder.AlterColumn<int>(
+                name: "ThirdPartyId",
+                table: "Houses",
+                type: "int",
+                nullable: false,
+                defaultValue: 0,
+                oldClrType: typeof(string),
+                oldType: "nvarchar(max)",
+                oldNullable: true);
+
+            migrationBuilder.AlterColumn<Guid>(
+                name: "FiasId",
+                table: "Houses",
+                type: "uniqueidentifier",
+                nullable: false,
+                defaultValue: new Guid("00000000-0000-0000-0000-000000000000"),
+                oldClrType: typeof(Guid),
+                oldType: "uniqueidentifier",
+                oldNullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Houses_FiasId",
+                table: "Houses",
+                column: "FiasId",
+                unique: true);
+        }
+    }
+}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs b/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
index d2daed8..23592a9 100644
--- a/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
+++ b/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
@@ -64,7 +64,10 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
 
                 SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
 
-                b.Property<Guid>("FiasId")
+                b.Property<Guid?>("FiasId")
+                    .HasColumnType("uniqueidentifier");
+
+                b.Property<Guid?>("HcsId")
                     .HasColumnType("uniqueidentifier");
 
                 b.Property<bool>("IsMkd")
@@ -79,13 +82,14 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
                 b.Property<DateTime?>("SyncedAt")
                     .HasColumnType("datetime2");
 
-                b.Property<int>("ThirdPartyId")
-                    .HasColumnType("int");
+                b.Property<string>("ThirdPartyId")
+                    .HasColumnType("nvarchar(max)");
 
                 b.HasKey("Id");
 
                 b.HasIndex("FiasId")
-                    .IsUnique();
+                    .IsUnique()
+                    .HasFilter("[FiasId] IS NOT NULL");
 
                 b.HasIndex("LastSyncOperationId");