diff --git a/application/ADBWohneinheit/ADBWohneinheitController.php b/application/ADBWohneinheit/ADBWohneinheitController.php
index be0cf1b6b..face55bdb 100644
--- a/application/ADBWohneinheit/ADBWohneinheitController.php
+++ b/application/ADBWohneinheit/ADBWohneinheitController.php
@@ -158,5 +158,25 @@ class ADBWohneinheitController extends mfBaseController {
     $this->redirect("AddressDB", "view", ["id" => $hausnummer_id]);
 
   }
+
+  protected function duplicateAction() {
+      $duplicateHomes = ADBWohneinheitModel::searchDuplicateExtref();
+
+      $JSGlobals = ["BASE_URL" => self::getUrl(""),
+          "DASHBOARD_URL" => self::getUrl("Dashboard"),
+          "MFAPPNAME" => MFAPPNAME_SLUG,
+          "PAGE_TITLE" => "Doppelte Homes",
+          "PATH" => [
+              ["text" => MFAPPNAME_SLUG, "href" => self::getUrl("Dashboard")],
+              ["text" => "Doppelte Homes", "href" => self::getUrl("ADBWohneinheit", "duplicate")],
+          ],
+          "DUPLICATE_HOMES" => $duplicateHomes,
+          "IS_ADMIN" => $this->me->is("Admin"),
+      ];
+
+      $this->layout()->set("vueViewName", "ADBWohneinheitDuplicate");
+      $this->layout()->set("JSGlobals", $JSGlobals);
+      $this->layout()->setTemplate("VueViews/Vue");
+  }
   
 }
\ No newline at end of file
diff --git a/application/ADBWohneinheit/ADBWohneinheitModel.php b/application/ADBWohneinheit/ADBWohneinheitModel.php
index 968b20bb9..5fea54a18 100644
--- a/application/ADBWohneinheit/ADBWohneinheitModel.php
+++ b/application/ADBWohneinheit/ADBWohneinheitModel.php
@@ -281,5 +281,60 @@ class ADBWohneinheitModel {
     //var_dump($filter, $where);exit;
     return $where;
   }
-  
+
+    public static function searchDuplicateExtref($filter = []) {
+        $duplicates = [];
+        $db = FronkDB::singleton(ADDRESSDB_DBHOST, ADDRESSDB_DBUSER, ADDRESSDB_DBPASS, ADDRESSDB_DBNAME)->link;
+        $where = self::getSqlFilter($filter);
+
+        $sql = "SELECT Wohneinheit.extref, COUNT(*) as count 
+            FROM Wohneinheit
+            LEFT JOIN Hausnummer ON (Hausnummer.id = Wohneinheit.hausnummer_id)
+            WHERE $where AND Wohneinheit.extref IS NOT NULL
+            GROUP BY Wohneinheit.extref
+            HAVING COUNT(*) > 1
+            ORDER BY COUNT(*) DESC";
+
+        $res = $db->query($sql);
+        $duplicateExtrefs = [];
+
+        while($data = $res->fetch_assoc()) {
+            $duplicateExtrefs[] = $data['extref'];
+            $duplicates[$data['extref']] = [
+                'extref' => $data['extref'],
+                'count' => $data['count'],
+                'homeData' => []
+            ];
+        }
+
+        if (!empty($duplicateExtrefs)) {
+            $extrefList = "'" . implode("','", array_map([$db, 'real_escape_string'], $duplicateExtrefs)) . "'";
+            $detailSql = "SELECT Wohneinheit.* 
+                      FROM Wohneinheit
+                      LEFT JOIN Hausnummer ON (Hausnummer.id = Wohneinheit.hausnummer_id)
+                      WHERE $where AND Wohneinheit.extref IN ($extrefList)
+                      ORDER BY Wohneinheit.extref";
+
+            $detailRes = $db->query($detailSql);
+            while($homeData = $detailRes->fetch_assoc()) {
+                $duplicates[$homeData['extref']]['homeData'][] = [
+                    "id" => $homeData['id'],
+                    "oaid" => $homeData['oaid'],
+                    "hausnummer_id" => $homeData['hausnummer_id'],
+                    "num" => $homeData['num'],
+                    "nutzung" => $homeData['nutzung'],
+                    "rimo_ex_state" => $homeData['rimo_ex_state'],
+                    "rimo_op_state" => $homeData['rimo_op_state'],
+                    "create" => $homeData['create'],
+                    "edit" => $homeData['edit'],
+                ];
+            }
+        }
+
+        return array_values($duplicates);
+    }
+
+
+
+
 }
diff --git a/public/js/pages/ADBWohneinheitDuplicate/ADBWohneinheitDuplicate.js b/public/js/pages/ADBWohneinheitDuplicate/ADBWohneinheitDuplicate.js
new file mode 100644
index 000000000..81ae9df46
--- /dev/null
+++ b/public/js/pages/ADBWohneinheitDuplicate/ADBWohneinheitDuplicate.js
@@ -0,0 +1,88 @@
+Vue.component('a-d-b-wohneinheit-duplicate', {
+    //language=Vue
+    template: `
+      <tt-card>
+        <tt-table :data="window['TT_CONFIG']['DUPLICATE_HOMES']" :config="DuplicateHomesTableConfig" excel-export>
+          
+          <template v-slot:extref="{ row }">
+            <span class="badge badge-warning">{{ row.extref }}</span>
+          </template>
+
+          <template v-slot:count="{ row }">
+            <span class="badge badge-danger">{{ row.count }}</span>
+          </template>
+
+          <template v-slot:homedetails="{ row }">
+            <div class="duplicate-homes-container">
+              <table class="table table-sm table-bordered table-striped">
+                <thead>
+                <tr>
+                  <th>ID</th>
+                  <th>OAID</th>
+                  <th>Num</th>
+                  <th>Nutzung</th>
+                  <th>Rimo Ex State</th>
+                  <th>Rimo Op State</th>
+                  <th>Erstellt</th>
+                  <th>Zuletzt editiert</th>
+                  <th>Aktionen</th>
+                </tr>
+                </thead>
+                <tbody>
+                <tr v-for="home in row.homeData" :key="home.id" :class="{'bg-light': home.id % 2 === 0}">
+                  <td>{{ home.id }}</td>
+                  <td>{{ home.oaid || 'N/A' }}</td>
+                  <td>{{ home.num }}</td>
+                  <td>{{ home.nutzung || 'N/A' }}</td>
+                  <td>{{ home.rimo_ex_state || 'N/A' }}</td>
+                  <td>{{ home.rimo_op_state || 'N/A' }}</td>
+                  <td>{{ formatDate(home.create) }}</td>
+                  <td>{{ formatDate(home.edit) }}</td>
+                  <td>
+                    <div class="btn-group btn-group-sm">
+                      <a :href="window['TT_CONFIG']['BASE_URL'] + '/AddressDB/view/?id=' + home.id"
+                         class="btn btn-info"
+                         target="_blank"
+                         title="View">
+                        <i class="far fa-eye"></i>
+                      </a>
+                    </div>
+                  </td>
+                </tr>
+                </tbody>
+              </table>
+            </div>
+          </template>
+        </tt-table>
+      </tt-card>
+    `,
+    data() {
+        return {
+            window: window,
+            markedForDeletion: [],
+            DuplicateHomesTableConfig: {
+                key: 'DuplicateHomesTable',
+                tableHeader: 'Doppelte HomeID Liste',
+                defaultPageSize: 10,
+                headers: [
+                    {text: 'HomeID', key: 'extref', sortable: true, class: 'text-nowrap', priority: 10},
+                    {text: 'Anzahl gleicher HomeIDs', key: 'count', sortable: true, class: 'text-center', priority: 9},
+                    {
+                        text: 'Home Details',
+                        key: 'homeDetails',
+                        sortable: false,
+                        class: 'w-75',
+                        filter: false,
+                        priority: 8
+                    },
+                ],
+            },
+        }
+    },
+    methods: {
+        formatDate(timestamp) {
+            if (!timestamp) return 'N/A';
+            return this.window.moment.unix(timestamp).format('DD.MM.YYYY HH:mm:ss');
+        },
+    },
+})
\ No newline at end of file