27 Basildene Road, Hounslow, TW4 7LG

1. 17 Mar 2026

   Received by Hounslow

2. 31 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Apr 2026

   Decision issued: GRANT

4. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 21 April 2026, 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.

• 41 Manor Avenue, Hounslow, TW4 7JN

  P/2025/3262 Submitted 28 Oct 2025 100 yards away

  Certificate of lawfulness proposed for a hip to gable conversion and erection of a rear roof extension with two front roof windows.

  Granted Lawful development Extension Loft or dormer +1 5 docs

• 41 Manor Avenue, Hounslow, TW4 7JN

  PA/2025/3261 Submitted 28 Oct 2025 100 yards away

  Ground floor rear extension 6.00 metres deep, maximum height 3.10 metres, 3.00 metres high to the eaves.

  Granted Prior approval Extension 5 docs

• 17 Basildene Road, Hounslow, TW4 7LF

  PA/2026/1037 Submitted 30 Mar 2026 100 yards away

  Ground floor rear extension 6.00 metres deep, maximum height of 2.90 metres, 2.90 metres high to the eaves

  Granted Prior approval Extension 6 docs

• 104 Rosemary Avenue, Hounslow, TW4 7JG

  P/2026/1947 Submitted 1 Jul 2026 100 yards away

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

  Granted Lawful development Extension Loft or dormer +1 6 docs

• 104 Rosemary Avenue, Hounslow, TW4 7JG

  PA/2026/2415 Submitted 24 Aug 2026 100 yards away

  78% historically approved · decision due ~19 Oct

  Ground floor rear extension 6.00 metres deep, maximum height 3.25 metres, 3.00 metres high to the eaves.

  Awaiting decision Prior approval Extension 3 docs

• 81 ROSEMARY AVENUE, HOUNSLOW, TW4 7JQ

  P/2023/0223 Submitted 23 Jan 2023 150 yards away

  Certificate of Lawfulness for erection of rear roof extension including hip to gable conversion with front/side roof windows to the house.

  Withdrawn Lawful development Extension Loft or dormer +1 3 docs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