diff --git a/.vscode/launch.json b/.vscode/launch.json
index a4175a733..501bd2251 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -103,6 +103,7 @@
       "args": [
         "deploy",
         "--dry-run",
+        "--verbose"
       ],
       "console": "integratedTerminal",
       "justMyCode": false
diff --git a/CHANGELOG.cdf-tk.md b/CHANGELOG.cdf-tk.md
index f9cd1c504..6d488c585 100644
--- a/CHANGELOG.cdf-tk.md
+++ b/CHANGELOG.cdf-tk.md
@@ -30,6 +30,7 @@ Changes are grouped as follows:
 - In `cdf build` when loading `config.[env].yaml` the Toolkit now correctly prefers variables deeper, more
   specific, in the hierarchy over more general variables.
 - [Alpha feature] `cdf build` will no longer copy content `YAML` files to the build directory.
+- A bug caused the comparison with existing Tranformation Notifications to fail. This is now fixed.
 
 ### Improved
 
diff --git a/cognite_toolkit/_cdf_tk/loaders/_resource_loaders/transformation_loaders.py b/cognite_toolkit/_cdf_tk/loaders/_resource_loaders/transformation_loaders.py
index 51ca4ea14..d97cea1d2 100644
--- a/cognite_toolkit/_cdf_tk/loaders/_resource_loaders/transformation_loaders.py
+++ b/cognite_toolkit/_cdf_tk/loaders/_resource_loaders/transformation_loaders.py
@@ -482,6 +482,19 @@ def dump_id(cls, id: str) -> dict[str, Any]:
             "destination": destination,
         }
 
+    def _are_equal(
+        self,
+        local: TransformationNotificationWrite,
+        cdf_resource: TransformationNotification,
+        return_dumped: bool = False,
+    ) -> bool | tuple[bool, dict[str, Any], dict[str, Any]]:
+        local_dumped = local.dump()
+        cdf_dumped = cdf_resource.as_write().dump()
+        cdf_dumped.pop("transformationId")
+        cdf_dumped["transformationExternalId"] = local.transformation_external_id
+
+        return self._return_are_equal(local_dumped, cdf_dumped, return_dumped)
+
     @classmethod
     def get_required_capability(
         cls, items: TransformationNotificationWriteList | None, read_only: bool
@@ -508,11 +521,17 @@ def retrieve(self, ids: SequenceNotStr[str]) -> TransformationNotificationList:
                 result = self.client.transformations.notifications.list(
                     transformation_external_id=transformation_external_id, destination=destination, limit=-1
                 )
+                # list() does not return the transformation_external_id on items
+                for notification in result:
+                    notification.transformation_external_id = transformation_external_id
+
             except CogniteAPIError:
                 # The notification endpoint gives a 500 if the notification does not exist.
                 # The issue has been reported to the service team.
                 continue
+
             retrieved.extend(result)
+
         return retrieved
 
     def update(self, items: TransformationNotificationWriteList) -> TransformationNotificationList: