diff --git a/packages/start/src/config/index.ts b/packages/start/src/config/index.ts
index b8cf5bf58..06d4fbacb 100644
--- a/packages/start/src/config/index.ts
+++ b/packages/start/src/config/index.ts
@@ -73,7 +73,7 @@ export function solidStart(options?: SolidStartOptions): Array<PluginOption> {
           },
         };
       },
-      async config(_, env) {
+      async config(config, env) {
         const clientInput = [handlers.client];
         if (env.command === "build") {
           const clientRouter: BaseFileSystemRouter = (globalThis as any).ROUTERS.client;
@@ -143,6 +143,9 @@ export function solidStart(options?: SolidStartOptions): Array<PluginOption> {
             "import.meta.env.START_CLIENT_ENTRY": JSON.stringify(handlers.client),
             "import.meta.env.START_DEV_OVERLAY": JSON.stringify(start.devOverlay),
             "import.meta.env.SEROVAL_MODE": JSON.stringify(start.serialization?.mode || "json"),
+            "import.meta.env.SERVER_BASE_URL": JSON.stringify(
+              (config as { server?: { baseURL?: string } })?.server?.baseURL ?? "",
+            ),
           },
           builder: {
             sharedPlugins: true,
diff --git a/packages/start/src/env.d.ts b/packages/start/src/env.d.ts
index fad2a39ab..329c0de8d 100644
--- a/packages/start/src/env.d.ts
+++ b/packages/start/src/env.d.ts
@@ -13,5 +13,5 @@ interface SolidStartMetaEnv {
   START_CLIENT_ENTRY: string;
   START_ISLANDS: boolean;
   // START_DEV_OVERLAY: boolean;
-  // SERVER_BASE_URL: string;
+  SERVER_BASE_URL: string;
 }
diff --git a/packages/start/src/server/handler.ts b/packages/start/src/server/handler.ts
index 206bc9e26..74424db28 100644
--- a/packages/start/src/server/handler.ts
+++ b/packages/start/src/server/handler.ts
@@ -254,6 +254,10 @@ function produceResponseWithEventHeaders(res: Response) {
 }
 
 function stripBaseUrl(path: string) {
-  if (import.meta.env.BASE_URL === "/" || import.meta.env.BASE_URL === "") return path;
-  return path.slice(import.meta.env.BASE_URL.length);
+  const base =
+    import.meta.env.SERVER_BASE_URL || import.meta.env.BASE_URL || "/";
+  if (base === "/" || base === "") return path;
+  const normalizedBase = base.endsWith("/") ? base.slice(0, -1) : base;
+  if (normalizedBase === "") return path;
+  return path.startsWith(normalizedBase) ? path.slice(normalizedBase.length) || "/" : path;
 }