diff --git a/.changeset/dull-toys-work.md b/.changeset/dull-toys-work.md
new file mode 100644
index 000000000000..63802e8600a1
--- /dev/null
+++ b/.changeset/dull-toys-work.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-cloudflare': patch
+---
+
+fix: address build failure when using `paths.base` (#13769)
diff --git a/packages/adapter-cloudflare/index.js b/packages/adapter-cloudflare/index.js
index af99452ef8fd..5bb705f6a6ae 100644
--- a/packages/adapter-cloudflare/index.js
+++ b/packages/adapter-cloudflare/index.js
@@ -62,6 +62,7 @@ export default function (options = {}) {
 
 			// client assets and prerendered pages
 			const assets_dest = `${dest}${builder.config.kit.paths.base}`;
+			builder.mkdirp(assets_dest);
 			if (
 				building_for_cloudflare_pages ||
 				wrangler_config.assets?.not_found_handling === '404-page'