diff --git a/.changeset/rotten-cheetahs-complain.md b/.changeset/rotten-cheetahs-complain.md
new file mode 100644
index 000000000000..1650a70be1a4
--- /dev/null
+++ b/.changeset/rotten-cheetahs-complain.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: adhere to Vite `build.minify` setting when building the service worker
diff --git a/packages/kit/src/exports/vite/build/build_service_worker.js b/packages/kit/src/exports/vite/build/build_service_worker.js
index a7c11188d02a..3b7c1cfe38f9 100644
--- a/packages/kit/src/exports/vite/build/build_service_worker.js
+++ b/packages/kit/src/exports/vite/build/build_service_worker.js
@@ -105,7 +105,8 @@ export async function build_service_worker(
 				}
 			},
 			outDir: `${out}/client`,
-			emptyOutDir: false
+			emptyOutDir: false,
+			minify: vite_config.build.minify
 		},
 		configFile: false,
 		define: vite_config.define,
diff --git a/packages/kit/src/exports/vite/index.js b/packages/kit/src/exports/vite/index.js
index e6521e979560..2c76a71f0026 100644
--- a/packages/kit/src/exports/vite/index.js
+++ b/packages/kit/src/exports/vite/index.js
@@ -886,7 +886,13 @@ async function kit({ svelte_config }) {
 					await build_service_worker(
 						out,
 						kit,
-						vite_config,
+						{
+							...vite_config,
+							build: {
+								...vite_config.build,
+								minify: initial_config.build?.minify ?? 'esbuild'
+							}
+						},
 						manifest_data,
 						service_worker_entry_file,
 						prerendered,