diff --git a/homeassistant/components/overkiz/cover.py b/homeassistant/components/overkiz/cover.py
index ca8057fd389d2..6610f229a72af 100644
--- a/homeassistant/components/overkiz/cover.py
+++ b/homeassistant/components/overkiz/cover.py
@@ -417,6 +417,8 @@ def is_closed(self) -> bool | None:
         """Return if the cover is closed."""
         if is_closed_state := self.entity_description.is_closed_state:
             if state := self.device.states.get(is_closed_state):
+                if state.value == OverkizCommandParam.UNKNOWN:
+                    return None
                 return state.value == OverkizCommandParam.CLOSED
 
         if (position := self.current_cover_position) is not None:
diff --git a/tests/components/overkiz/fixtures/setup/cloud_somfy_tahoma_v2_europe.json b/tests/components/overkiz/fixtures/setup/cloud_somfy_tahoma_v2_europe.json
index 767327d82d360..866eb301aa2ee 100644
--- a/tests/components/overkiz/fixtures/setup/cloud_somfy_tahoma_v2_europe.json
+++ b/tests/components/overkiz/fixtures/setup/cloud_somfy_tahoma_v2_europe.json
@@ -644,6 +644,76 @@
       "oid": "0df95043-359c-4b3d-9147-f49b2b35053c",
       "uiClass": "GarageDoor"
     },
+    {
+      "creationTime": 1521964729000,
+      "lastUpdateTime": 1521964729000,
+      "label": "Basement Garage Door",
+      "deviceURL": "io://1234-1234-6233/1166864",
+      "shortcut": false,
+      "controllableName": "io:GarageOpenerIOComponent",
+      "definition": {
+        "commands": [
+          {
+            "commandName": "close",
+            "nparams": 0
+          },
+          {
+            "commandName": "open",
+            "nparams": 0
+          },
+          {
+            "commandName": "setClosure",
+            "nparams": 1
+          },
+          {
+            "commandName": "stop",
+            "nparams": 0
+          }
+        ],
+        "states": [
+          {
+            "type": "ContinuousState",
+            "qualifiedName": "core:ClosureState"
+          },
+          {
+            "type": "DiscreteState",
+            "values": ["closed", "open", "unknown"],
+            "qualifiedName": "core:OpenClosedUnknownState"
+          }
+        ],
+        "widgetName": "PositionableGarageDoor",
+        "uiProfiles": [
+          "StatefulCloseableGarageOpener",
+          "StatefulCloseable",
+          "Closeable",
+          "OpenClose"
+        ],
+        "uiClass": "GarageDoor",
+        "qualifiedName": "io:GarageOpenerIOComponent",
+        "type": "ACTUATOR"
+      },
+      "states": [
+        {
+          "name": "core:OpenClosedUnknownState",
+          "type": 3,
+          "value": "unknown"
+        }
+      ],
+      "attributes": [
+        {
+          "name": "core:Manufacturer",
+          "type": 3,
+          "value": "Somfy"
+        }
+      ],
+      "available": true,
+      "enabled": true,
+      "placeOID": "bcbb34ef-2241-43a1-9c5b-523aa0563ec3",
+      "widget": "PositionableGarageDoor",
+      "type": 1,
+      "oid": "1df95043-359c-4b3d-9147-f49b2b35053d",
+      "uiClass": "GarageDoor"
+    },
     {
       "creationTime": 1552163547000,
       "lastUpdateTime": 1552163547000,
diff --git a/tests/components/overkiz/snapshots/test_cover.ambr b/tests/components/overkiz/snapshots/test_cover.ambr
index 4683840c5f806..2e867a33370b3 100644
--- a/tests/components/overkiz/snapshots/test_cover.ambr
+++ b/tests/components/overkiz/snapshots/test_cover.ambr
@@ -919,6 +919,59 @@
     'state': 'open',
   })
 # ---
+# name: test_cover_entities_snapshot[cloud_somfy_tahoma_v2_europe.json][cover.basement_garage_door-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'cover',
+    'entity_category': None,
+    'entity_id': 'cover.basement_garage_door',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': None,
+    'options': dict({
+    }),
+    'original_device_class': <CoverDeviceClass.GARAGE: 'garage'>,
+    'original_icon': None,
+    'original_name': None,
+    'platform': 'overkiz',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': <CoverEntityFeature: 15>,
+    'translation_key': None,
+    'unique_id': 'io://1234-1234-6233/1166864',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_cover_entities_snapshot[cloud_somfy_tahoma_v2_europe.json][cover.basement_garage_door-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'garage',
+      'friendly_name': 'Basement Garage Door',
+      'is_closed': None,
+      'supported_features': <CoverEntityFeature: 15>,
+    }),
+    'context': <ANY>,
+    'entity_id': 'cover.basement_garage_door',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'unknown',
+  })
+# ---
 # name: test_cover_entities_snapshot[cloud_somfy_tahoma_v2_europe.json][cover.bedroom_blinds-entry]
   EntityRegistryEntrySnapshot({
     'aliases': list([