diff --git a/core/modules/layout_builder/js/layout-builder.es6.js b/core/modules/layout_builder/js/layout-builder.es6.js
index 0b4885282b..802f72f236 100644
--- a/core/modules/layout_builder/js/layout-builder.es6.js
+++ b/core/modules/layout_builder/js/layout-builder.es6.js
@@ -153,7 +153,7 @@
           Sortable.create(region, {
             draggable: '.js-layout-builder-block',
             ghostClass: 'ui-state-drop',
-            group: 'builder-region',
+            group: region.getAttribute('data-layout-group'),
             onEnd: (event) =>
               Drupal.layoutBuilderBlockUpdate(event.item, event.from, event.to),
           });
diff --git a/core/modules/layout_builder/js/layout-builder.js b/core/modules/layout_builder/js/layout-builder.js
index 27fa04522f..397546fc42 100644
--- a/core/modules/layout_builder/js/layout-builder.js
+++ b/core/modules/layout_builder/js/layout-builder.js
@@ -69,7 +69,7 @@
         Sortable.create(region, {
           draggable: '.js-layout-builder-block',
           ghostClass: 'ui-state-drop',
-          group: 'builder-region',
+          group: region.getAttribute('data-layout-group'),
           onEnd: function onEnd(event) {
             return Drupal.layoutBuilderBlockUpdate(event.item, event.from, event.to);
           }
diff --git a/core/modules/layout_builder/src/Element/LayoutBuilder.php b/core/modules/layout_builder/src/Element/LayoutBuilder.php
index 8bf656475b..afd3f1dd1c 100644
--- a/core/modules/layout_builder/src/Element/LayoutBuilder.php
+++ b/core/modules/layout_builder/src/Element/LayoutBuilder.php
@@ -300,6 +300,7 @@ protected function buildAdministrativeSection(SectionStorageInterface $section_s
       ];
       $build[$region]['layout_builder_add_block']['#weight'] = 1000;
       $build[$region]['#attributes']['data-region'] = $region;
+      $build[$region]['#attributes']['data-layout-group'] = isset($info['group']) ?: ($layout_definition->get('group') ?: 'builder-region');
       $build[$region]['#attributes']['class'][] = 'layout-builder__region';
       $build[$region]['#attributes']['class'][] = 'js-layout-builder-region';
       $build[$region]['#attributes']['role'] = 'group';