diff --git a/Layout/default/ConstructionConsent/View.php b/Layout/default/ConstructionConsent/View.php
index 0a826ce34..8d017467d 100644
--- a/Layout/default/ConstructionConsent/View.php
+++ b/Layout/default/ConstructionConsent/View.php
@@ -304,7 +304,7 @@ $pagination_entity_name = "Adressen";
                                     <th></th>
                                 </tr>
                                 <?php foreach($item->owners as $owner): ?>
-                                    <tr id="owner-data-<?=$owner->id?>" data-title="<?=$owner->title?>" data-firstname="<?=$owner->firstname?>" data-lastname="<?=$owner->lastname?>" data-street="<?=$owner->street?>" data-zip="<?=$owner->zip?>" data-city="<?=$owner->city?>" data-country="<?=$owner->country?>" data-phone="<?=$owner->phone?>" data-phone2="<?=$owner->phone2?>" data-fax="<?=$owner->fax?>" data-email="<?=$owner->email?>">
+                                    <tr id="owner-data-<?=$owner->id?>" data-title="<?=$owner->title?>" data-firstname="<?=$owner->firstname?>" data-lastname="<?=$owner->lastname?>" data-street="<?=$owner->street?>" data-zip="<?=$owner->zip?>" data-city="<?=$owner->city?>" data-country="<?=$owner->country?>" data-phone="<?=$owner->phone?>" data-phone2="<?=$owner->phone2?>" data-fax="<?=$owner->fax?>" data-email="<?=$owner->email?>" data-birthdate="<?=($owner->birthdate) ? (new DateTime($owner->birthdate))->format("d.m.Y"): ""?>">
                                         <td style="font-size: 1.4em;">
                                             <a href="<?=self::getUrl("ConstructionConsent", "Download", ["owner_id" => $owner->id])?>" title="Zustimmungserklärungsformular herunterladen"><i class="far fa-fw fa-file-download"></i></a>
                                         </td>
@@ -505,6 +505,11 @@ $pagination_entity_name = "Adressen";
                             <small>Kann leer bleiben für Österreich</small>
                         </div>
 
+                        <div class="form-group">
+                            <label for="birthdate" class="col-form-label">Geburtsdatum:</label>
+                            <input type="text" class="form-control" name="birthdate" id="birthdate" />
+                        </div>
+
                         <h4>Kontakt</h4>
 
                         <div class="form-group">
@@ -785,13 +790,8 @@ $pagination_entity_name = "Adressen";
             });
         }
     });
-    //var blah = new Switchery();
-    /*$(".switchery").each(() => {
-        console.log($(this).id);
 
-    });*/
-
-    $("#inspection_date_planner,#inspection_date_electrician").datepicker({
+    $("#inspection_date_planner,#inspection_date_electrician,#birthdate").datepicker({
         language: 'de',
         format: "dd.mm.yyyy",
         showWeekDays: true,
@@ -819,6 +819,7 @@ $pagination_entity_name = "Adressen";
         $("#newOwnerModal input[name=phone2]").val("");
         $("#newOwnerModal input[name=fax]").val("");
         $("#newOwnerModal input[name=email]").val("");
+        $("#newOwnerModal input[name=birthdate]").val("");
         $("#newOwnerModal input[name=id]").val("");
 
         $("#newOwnerModelLabel").text("Neuen Besitzer hinzufügen");
@@ -840,6 +841,7 @@ $pagination_entity_name = "Adressen";
         $("#newOwnerModal input[name=phone2]").val($("#owner-data-" + owner_id).data("phone2"));
         $("#newOwnerModal input[name=fax]").val($("#owner-data-" + owner_id).data("fax"));
         $("#newOwnerModal input[name=email]").val($("#owner-data-" + owner_id).data("email"));
+        $("#newOwnerModal input[name=birthdate]").val($("#owner-data-" + owner_id).data("birthdate"));
         $("#newOwnerModal input[name=id]").val(owner_id);
 
         $("#newOwnerModelLabel").text("Besitzer bearbeiten");
diff --git a/application/ConstructionConsentOwner/ConstructionConsentOwnerController.php b/application/ConstructionConsentOwner/ConstructionConsentOwnerController.php
index 7473c2e77..0f924ce93 100644
--- a/application/ConstructionConsentOwner/ConstructionConsentOwnerController.php
+++ b/application/ConstructionConsentOwner/ConstructionConsentOwnerController.php
@@ -89,6 +89,16 @@ class ConstructionConsentOwnerController extends mfBaseController
         $data["phone2"] = $r->phone2;
         $data["fax"] = $r->fax;
         $data["email"] = $r->email;
+        $date["birthdate"] = null;
+
+        if($r->birthdate) {
+            try {
+                $birthdate = DateTime::createFromFormat("d.m.Y", $r->birthdate, new DateTimeZone("Europe/Vienna"));
+                $data["birthdate"] = $birthdate->format("Y-m-d");
+            } catch(Exception $e) {
+                $this->layout()->setFlash("Ungültiges Geburtsdateum", "warning");
+            }
+        }
 
         if($mode == "add") {
             $data["status"] = "new";