diff --git a/defaults/main.yml b/defaults/main.yml
index e1aff647..4ccb3060 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -427,7 +427,9 @@ horizon_custom_themes: {}
 # value is the theme_name from the vars above
 horizon_default_theme: "default"
 
-horizon_webroot: /
+# URI through which Horizon will be available.
+# If Skyline is not deployed defaults to `/`, `/horizon` otherwise.
+horizon_webroot: "{{ (groups['skyline_all'] | default([])) | ternary('/horizon', '/') }}"
 
 horizon_bind_address: "{{ openstack_service_bind_address | default('0.0.0.0') }}"
 
diff --git a/releasenotes/notes/horizon_webroot-ae22a11343c1fb1e.yaml b/releasenotes/notes/horizon_webroot-ae22a11343c1fb1e.yaml
new file mode 100644
index 00000000..13a6fc6a
--- /dev/null
+++ b/releasenotes/notes/horizon_webroot-ae22a11343c1fb1e.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Horizon is now co-installabe with Skyline dashboard. In case both
+    Horizon and Skyline are deployed, Horizon will be served by
+    `/horizon` URI.