18 Castle Road, Isleworth, TW7 6QS

1. 27 Aug 2025

   Received by Hounslow

2. 22 Oct 2025

   Decision issued: GRANT

3. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 22 October 2025, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 8 Castle Road, Isleworth, TW7 6QS

  P/2024/2473 Submitted 23 Jul 2024 50 yards away

  Erection of a single storey rear infill extension

  Refused Householder Extension 7 docs
  Small domestic

• 36 CASTLE ROAD, ISLEWORTH, TW7 6QS

  PA/2019/3928 Submitted 29 Oct 2019 50 yards away

  Ground floor rear extension 4.925 metres deep, maximum height of 3 metres, 3 metres high to the eaves

  Withdrawn Prior approval Extension 2 docs

• 38 Castle Road, Isleworth, TW7 6QS

  P/2026/0328 Submitted 3 Feb 2026 50 yards away

  Certificate of lawfulness for the proposed outrigger roof extension to the house

  Granted Lawful development Extension 5 docs

• 107 LINKFIELD ROAD, ISLEWORTH, TW7 6QW

  P/2023/0524 Submitted 16 Feb 2023 50 yards away

  Erection of a single storey side and rear extension.

  Granted Householder Extension 6 docs
  Small domestic

• 23 GRAINGER ROAD, ISLEWORTH, TW7 6PQ

  P/2021/3246 Submitted 10 Aug 2021 50 yards away

  Certificate of Lawfulness for the proposed erection of a single storey side / rear infill extension and a rear roof extension incorporating a Juliet balcony and two front roof windows to the house

  Refused Lawful development Extension Windows or glazing 11 docs
  Small domestic

• 23 GRAINGER ROAD, ISLEWORTH, TW7 6PQ

  P/2021/3718 Submitted 15 Sep 2021 50 yards away

  Certificate of Lawfulness for the proposed erection of a rear roof extension incorporating a Juliet balcony and two front roof windows, removal of the existing front and rear pebbledash render and restore brick to the house

  Granted Lawful development Extension Windows or glazing 11 docs

• P/2026/2813 Awaiting decision

  150 Wood Lane, Isleworth, TW7 5EQ

  (GSGS877009741) Certificate of lawfulness proposed for the erection of a single storey outbuilding to be used as a home gym / playroom / shed in the rear garden of the house

  Received 5 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2334 Granted

  69 Central Avenue, Hounslow, TW3 2QW

  Certificate of lawfulness for the proposed hip to gable conversion and erection of rear roof extension with three front roof windows to the house.

  Received 12 Aug, published by the council 16 Aug 2026 Lawful development
• P/2026/2459 Granted

  2 Letchworth Avenue, Feltham, TW14 9RY

  Certificate of Lawfulness for the proposed hip to gable roof conversion, installation of two front roof windows, and erection of a rear roof extension to the existing house.

  Received 28 Aug, published by the council 5 Sep 2026 Lawful development
• P/2026/2787 Awaiting decision

  13 Denbigh Road, Hounslow, TW3 4DU

  Certificate of Lawfulness for the proposed erection of a detached outbuilding in the rear garden.

  Received 1 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2790 Awaiting decision

  14 Old Farm Close, Hounslow, TW4 7AB

  Certificate of lawfulness for the proposed erection of a rear roof extension and two front roof windows to the house.

  Received 1 Oct, published by the council 6 Oct 2026 Lawful development