diff --git a/test/helpers/dashboard-url.helper.spec.js b/test/helpers/dashboard-url.helper.spec.js
new file mode 100644
index 000000000..686e71d8e
--- /dev/null
+++ b/test/helpers/dashboard-url.helper.spec.js
@@ -0,0 +1,46 @@
+const should = require('should') // eslint-disable-line no-unused-vars
+
+describe('dashboard API URL helper', function () {
+    let getDashboardApiUrl
+
+    before(async function () {
+        const module = await import('../../ui/src/api/dashboard-url.mjs')
+        getDashboardApiUrl = module.getDashboardApiUrl
+    })
+
+    it('builds the default dashboard API URL', function () {
+        const url = getDashboardApiUrl(
+            'http://localhost:1880/dashboard/page?edit-key=key',
+            '',
+            '/dashboard',
+            'dashboard-id',
+            'flows'
+        )
+
+        url.href.should.equal('http://localhost:1880/dashboard/api/v1/dashboard-id/flows')
+    })
+
+    it('does not duplicate a shared admin and node root', function () {
+        const url = getDashboardApiUrl(
+            'http://localhost:1880/node-red/dashboard/page?edit-key=key',
+            '/node-red/',
+            '/dashboard/',
+            'dashboard-id',
+            'flows'
+        )
+
+        url.href.should.equal('http://localhost:1880/node-red/dashboard/api/v1/dashboard-id/flows')
+    })
+
+    it('uses the admin root when the node root is different', function () {
+        const url = getDashboardApiUrl(
+            'http://localhost:1880/node-red/dashboard/page?edit-key=key',
+            '/admin',
+            '/dashboard',
+            'dashboard-id',
+            'flows'
+        )
+
+        url.href.should.equal('http://localhost:1880/admin/dashboard/api/v1/dashboard-id/flows')
+    })
+})
diff --git a/ui/src/api/dashboard-url.mjs b/ui/src/api/dashboard-url.mjs
new file mode 100644
index 000000000..81db8436d
--- /dev/null
+++ b/ui/src/api/dashboard-url.mjs
@@ -0,0 +1,22 @@
+function trimPathPart (part) {
+    return String(part || '').replace(/^\/+|\/+$/g, '')
+}
+
+function getDashboardApiUrl (locationHref, editorPath, dashboardPath, dashboardId, ...path) {
+    const result = new URL(locationHref)
+    const pathParts = [
+        editorPath,
+        dashboardPath,
+        'api',
+        'v1',
+        dashboardId,
+        ...path
+    ].map(trimPathPart).filter(Boolean)
+
+    result.pathname = pathParts.join('/')
+    result.search = ''
+    result.hash = ''
+    return result
+}
+
+export { getDashboardApiUrl }
diff --git a/ui/src/api/node-red.js b/ui/src/api/node-red.js
index 9cacfccce..d9ef93130 100644
--- a/ui/src/api/node-red.js
+++ b/ui/src/api/node-red.js
@@ -1,5 +1,7 @@
 import axios from 'axios'
 
+import { getDashboardApiUrl } from './dashboard-url.mjs'
+
 function applyAuth (headers, editorPath) {
     let itemName = 'auth-tokens'
     if (editorPath) {
@@ -18,46 +20,23 @@ function applyAuth (headers, editorPath) {
     return headers
 }
 
-/**
- * Generates a full dashboard api url based off the current location and the dashboard id
- * The path parts are appended to the url
- * @example
- * // returns a URL object for 'http://localhost:1880/dashboard/api/v1/my-dashboard/flows'
- * const url = getDashboardApiUrl('', 'my-dashboard', 'flows')
- * @param {String} editorPath - The node-red editor path as provided by httpAdminRoot (e.g. 'editor') (can be empty)
- * @param {String} dashboardId - The dashboard id
- * @param  {...any} path - 1 or more path parts to append to the url
- * @returns {String} The full dashboard api url
- */
-function getDashboardApiUrl (editorPath, dashboardId, ...path) {
-    const url = new URL(window.location.href)
-    const urlBase = url.pathname.split('/').slice(0, -1).join('/') + '/api/v1/' // e.g 'http://localhost:1880/dashboard/api/v1/'
-    const pathParts = [urlBase, dashboardId, ...(path || [])].map(p => p.replace(/^\/|\/$/g, ''))
-    if (editorPath) {
-        pathParts.unshift(editorPath.replace(/\/$/, '').replace(/^\/+/, ''))
-    }
-    const result = new URL(url)
-    result.search = ''
-    result.pathname = pathParts.join('/')
-    return result
-}
-
 export default {
     /**
      * Deploy changes to the Node-RED instance via the dashboards httpAdmin endpoint
      * @param {Object} options - The options to deploy changes via the http admin endpoint
      * @param {string} options.dashboard - The dashboard id
+     * @param {string} options.dashboardPath - The dashboard base path
      * @param {string} options.page - The page id
      * @param {string} options.key - The edit key for verification
      * @param {Array<Object>} options.groups - The updated group objects to apply
      * @param {Array<Object>} options.widgets - The updated widget objects to apply
      * @returns the axios request
      */
-    deployChanges: async function deployChangesViaHttpAdminEndpoint ({ dashboard, page, groups, widgets, key, editorPath }) {
+    deployChanges: async function deployChangesViaHttpAdminEndpoint ({ dashboard, dashboardPath, page, groups, widgets, key, editorPath }) {
         const changes = { groups, widgets }
         return axios.request({
             method: 'PATCH',
-            url: getDashboardApiUrl(editorPath || '', dashboard, 'flows'),
+            url: getDashboardApiUrl(window.location.href, editorPath || '', dashboardPath, dashboard, 'flows'),
             headers: applyAuth({ 'Content-type': 'application/json' }, editorPath),
             data: { dashboard, page, key, changes }
         })
diff --git a/ui/src/layouts/wysiwyg/index.js b/ui/src/layouts/wysiwyg/index.js
index 1791791d9..9dc570769 100644
--- a/ui/src/layouts/wysiwyg/index.js
+++ b/ui/src/layouts/wysiwyg/index.js
@@ -139,6 +139,7 @@ export default {
 
             return NodeRedApi.deployChanges({
                 dashboard,
+                dashboardPath: this.$store.getters['ui/dashboards']?.[dashboard]?.path || 'dashboard',
                 page,
                 groups: currentPageGroups,
                 widgets: normalisedWidgets,