diff --git a/.changeset/gold-suns-repair.md b/.changeset/gold-suns-repair.md
new file mode 100644
index 000000000..8865645f5
--- /dev/null
+++ b/.changeset/gold-suns-repair.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix load `base` option in build
diff --git a/packages/astro/src/core/build/static-build.ts b/packages/astro/src/core/build/static-build.ts
index 06bae75f4..48ace69c0 100644
--- a/packages/astro/src/core/build/static-build.ts
+++ b/packages/astro/src/core/build/static-build.ts
@@ -160,6 +160,7 @@ async function ssrBuild(opts: StaticBuildOptions, internals: BuildInternals, inp
 		],
 		publicDir: ssr ? false : viteConfig.publicDir,
 		envPrefix: 'PUBLIC_',
+		base: astroConfig.base,
 	};
 
 	await runHookBuildSetup({
@@ -230,6 +231,7 @@ async function clientBuild(
 			...(viteConfig.plugins || []),
 		],
 		envPrefix: 'PUBLIC_',
+		base: astroConfig.base,
 	} as ViteConfigWithSSR;
 
 	await runHookBuildSetup({