diff --git a/apps/api/src/routes/restaurants.ts b/apps/api/src/routes/restaurants.ts
index 3e63395..762f822 100644
--- a/apps/api/src/routes/restaurants.ts
+++ b/apps/api/src/routes/restaurants.ts
@@ -3,6 +3,7 @@ import { z } from "zod";
 import { requireAuth, requireRestaurantMember } from "../lib/auth.js";
 import { generateUniqueRestaurantSlug } from "../lib/slug.js";
 import { supabase } from "../lib/supabase.js";
+import { deleteCustomHostname, getCustomHostnameByHostname } from "../lib/cloudflare.js";
 
 const createRestaurantSchema = z.object({
   name: z.string().min(1).max(120),
@@ -206,4 +207,59 @@ export const restaurantsRoutes: FastifyPluginAsync = async (app) => {
 
     return reply.send({ success: true, themeKey });
   });
+
+  app.delete("/restaurants/:id", async (req, reply) => {
+    const userId = await requireAuth(req, reply);
+    if (!userId || !supabase) return;
+
+    const { id } = req.params as { id: string };
+    const isMember = await requireRestaurantMember(userId, id);
+    if (!isMember) return reply.code(403).send({ message: "forbidden" });
+
+    // Delete custom hostnames from Cloudflare if any custom domains exist
+    const { data: domains } = await supabase.from("domains").select("id, hostname").eq("restaurant_id", id);
+    if (domains && domains.length > 0) {
+      for (const dom of domains) {
+        try {
+          const cfHostname = await getCustomHostnameByHostname(dom.hostname);
+          if (cfHostname?.id) {
+            await deleteCustomHostname(cfHostname.id);
+          }
+        } catch (err) {
+          req.log.warn({ err, hostname: dom.hostname }, "Cloudflare hostname delete failed during restaurant deletion");
+        }
+      }
+    }
+
+    // Delete associated database records
+    await supabase.from("domains").delete().eq("restaurant_id", id);
+    await supabase.from("restaurant_themes").delete().eq("restaurant_id", id);
+    await supabase.from("restaurant_members").delete().eq("restaurant_id", id);
+
+    // Delete locations, menus, categories, items
+    const { data: locations } = await supabase.from("locations").select("id").eq("restaurant_id", id);
+    if (locations && locations.length > 0) {
+      const locIds = locations.map((l) => l.id);
+      const { data: menus } = await supabase.from("menus").select("id").in("location_id", locIds);
+      if (menus && menus.length > 0) {
+        const menuIds = menus.map((m) => m.id);
+        const { data: categories } = await supabase.from("menu_categories").select("id").in("menu_id", menuIds);
+        if (categories && categories.length > 0) {
+          const catIds = categories.map((c) => c.id);
+          await supabase.from("menu_items").delete().in("category_id", catIds);
+          await supabase.from("menu_categories").delete().in("menu_id", menuIds);
+        }
+        await supabase.from("menus").delete().in("location_id", locIds);
+      }
+      await supabase.from("locations").delete().eq("restaurant_id", id);
+    }
+
+    const { error } = await supabase.from("restaurants").delete().eq("id", id);
+    if (error) {
+      req.log.error(error);
+      return reply.code(500).send({ message: "failed to delete restaurant" });
+    }
+
+    return reply.send({ success: true, message: "Restoran başarıyla silindi." });
+  });
 };
diff --git a/apps/mobile/src/app/account/index.tsx b/apps/mobile/src/app/account/index.tsx
index a804cc9..3d7a00e 100644
--- a/apps/mobile/src/app/account/index.tsx
+++ b/apps/mobile/src/app/account/index.tsx
@@ -81,6 +81,7 @@ export default function AccountScreen() {
   const [logoUrl, setLogoUrl] = useState<string | null>(null);
   const [slug, setSlug] = useState("");
   const [savingRest, setSavingRest] = useState(false);
+  const [deletingRestaurant, setDeletingRestaurant] = useState(false);
 
   // Theme state
   const [selectedTheme, setSelectedTheme] = useState("elegant");
@@ -319,6 +320,39 @@ export default function AccountScreen() {
     );
   }
 
+  async function handleDeleteRestaurant() {
+    if (!active) return;
+    Alert.alert(
+      "Restoranı Kalıcı Olarak Sil ⚠️",
+      `"${name}" restoranını ve bu restorana ait tüm menüleri, kategorileri, ürünleri ve özel alan adlarını kalıcı olarak silmek istediğinize emin misiniz?\n\nBu işlem geri alınamaz!`,
+      [
+        { text: "Vazgeç", style: "cancel" },
+        {
+          text: "Evet, Kalıcı Olarak Sil",
+          style: "destructive",
+          onPress: async () => {
+            setDeletingRestaurant(true);
+            Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Heavy).catch(() => {});
+            try {
+              await api.delete(`/restaurants/${active.restaurantId}`);
+              await clearActiveRestaurant();
+              Haptics.notificationAsync(Haptics.NotificationFeedbackType.Success).catch(() => {});
+              Alert.alert("Silindi 🗑️", "Restoranınız başarıyla silindi.", [
+                {
+                  text: "Tamam",
+                  onPress: () => router.replace("/(onboarding)/restaurant"),
+                },
+              ]);
+            } catch (err) {
+              Alert.alert("Hata", err instanceof Error ? err.message : "Restoran silinemedi.");
+              setDeletingRestaurant(false);
+            }
+          },
+        },
+      ],
+    );
+  }
+
   if (loading) {
     return (
       <View style={{ flex: 1, backgroundColor: "#FAF8F5", alignItems: "center", justifyContent: "center" }}>
@@ -951,6 +985,51 @@ export default function AccountScreen() {
             </Text>
           </Pressable>
         </View>
+
+        {/* Danger Zone: Delete Restaurant */}
+        <View
+          style={{
+            backgroundColor: "#FEF2F2",
+            borderRadius: 20,
+            padding: 20,
+            borderWidth: 1,
+            borderColor: "#FEE2E2",
+            gap: 12,
+          }}
+        >
+          <View style={{ flexDirection: "row", alignItems: "center", gap: 8 }}>
+            <Ionicons name="warning-outline" size={20} color="#DC2626" />
+            <Text style={{ fontSize: 16, fontWeight: "800", color: "#991B1B" }}>
+              Tehlikeli Bölge
+            </Text>
+          </View>
+
+          <Text style={{ fontSize: 12, color: "#991B1B", lineHeight: 18 }}>
+            Restoranınızı sildiğinizde bu restorana bağlı tüm menüler, kategoriler, ürünler ve özel alan adı ayarları kalıcı olarak silinir.
+          </Text>
+
+          <Pressable
+            onPress={handleDeleteRestaurant}
+            disabled={deletingRestaurant}
+            style={({ pressed }) => ({
+              backgroundColor: "#DC2626",
+              borderRadius: 12,
+              paddingVertical: 14,
+              alignItems: "center",
+              justifyContent: "center",
+              opacity: pressed || deletingRestaurant ? 0.85 : 1,
+              marginTop: 4,
+            })}
+          >
+            {deletingRestaurant ? (
+              <ActivityIndicator size="small" color="#FFFFFF" />
+            ) : (
+              <Text style={{ color: "#FFFFFF", fontSize: 14, fontWeight: "800" }}>
+                Restoranı Kalıcı Olarak Sil
+              </Text>
+            )}
+          </Pressable>
+        </View>
       </ScrollView>
     </View>
   );