diff --git a/src/config/dotenvs.rs b/src/config/dotenvs.rs
index c969238e..bd1f18f7 100644
--- a/src/config/dotenvs.rs
+++ b/src/config/dotenvs.rs
@@ -41,6 +41,7 @@ fn overlay(conf: &mut ProjectConfig, envs: impl Iterator<Item = (String, String)
             "LEPTOS_SITE_PKG_DIR" => conf.site_pkg_dir = Utf8PathBuf::from(val),
             "LEPTOS_STYLE_FILE" => conf.style_file = Some(Utf8PathBuf::from(val)),
             "LEPTOS_ASSETS_DIR" => conf.assets_dir = Some(Utf8PathBuf::from(val)),
+            "LEPTOS_SITE_BASE" => conf.site_base = Utf8PathBuf::from(val),
             "LEPTOS_SITE_ADDR" => conf.site_addr = val.parse()?,
             "LEPTOS_RELOAD_PORT" => conf.reload_port = val.parse()?,
             "LEPTOS_END2END_CMD" => conf.end2end_cmd = Some(val),
diff --git a/src/config/project.rs b/src/config/project.rs
index 0a6df656..7331549e 100644
--- a/src/config/project.rs
+++ b/src/config/project.rs
@@ -171,6 +171,7 @@ impl Project {
             ("LEPTOS_OUTPUT_NAME", self.lib.output_name.to_string()),
             ("LEPTOS_SITE_ROOT", self.site.root_dir.to_string()),
             ("LEPTOS_SITE_PKG_DIR", self.site.pkg_dir.to_string()),
+            ("LEPTOS_SITE_BASE", self.site.base.to_string()),
             ("LEPTOS_SITE_ADDR", self.site.addr.to_string()),
             ("LEPTOS_RELOAD_PORT", self.site.reload.port().to_string()),
             ("LEPTOS_LIB_DIR", self.lib.rel_dir.to_string()),
@@ -238,6 +239,8 @@ impl Project {
 pub struct ProjectConfig {
     #[serde(default)]
     pub output_name: String,
+    #[serde(default)]
+    pub site_base: Utf8PathBuf,
     #[serde(default = "default_site_addr")]
     pub site_addr: SocketAddr,
     #[serde(default = "default_site_root")]
diff --git a/src/service/site.rs b/src/service/site.rs
index 6c53cf2b..4f95c1b7 100644
--- a/src/service/site.rs
+++ b/src/service/site.rs
@@ -72,6 +72,7 @@ impl std::fmt::Debug for SiteFile {
 }
 
 pub struct Site {
+    pub base: Utf8PathBuf,
     pub addr: SocketAddr,
     pub reload: SocketAddr,
     pub root_dir: Utf8PathBuf,
@@ -83,6 +84,7 @@ pub struct Site {
 impl fmt::Debug for Site {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("Site")
+            .field("base", &self.base)
             .field("addr", &self.addr)
             .field("reload", &self.reload)
             .field("root_dir", &self.root_dir)
@@ -98,6 +100,7 @@ impl Site {
         let mut reload = config.site_addr;
         reload.set_port(config.reload_port);
         Self {
+            base: config.site_base.clone(),
             addr: config.site_addr,
             reload,
             root_dir: config.site_root.clone(),