247 Cromwell Road, Hounslow, TW3 3QT

1. 5 Nov 2025

   Received by Hounslow

2. 27 Nov 2025

   Decision issued: GRANT

3. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 27 November 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.

• 241 Cromwell Road,Hounslow,TW3 3QT

  P/2024/3583 Submitted 24 Oct 2024 50 yards away

  Erection of a detached outbuilding in the rear garden to be used as a granny annexe.

  Refused Full applications 9 docs

• 237 Cromwell Road, Hounslow, TW3 3QT

  P/2025/2671 Submitted 3 Sep 2025 50 yards away

  Non Material Amendment to change the roofing material of the approved raised roof of permission P/2024/4173 dated 12/03/2025 for Erection of replacement roof with increase in height to the existing conservatory to allow conversion into sitting room to the house

  Granted Amendments Extension Roofing 6 docs

• 174A Cromwell Road, Hounslow, TW3 3QS

  PA/2024/3668 Submitted 4 Nov 2024 50 yards away

  Ground floor rear extension 4.50 metres deep, maximum height 2.95 metres. 2.85 metres high to the eaves.

  Granted Prior approval Extension 4 docs

• 406 Hanworth Road, Hounslow, TW3 3SN

  P/2026/1888 Submitted 25 Jun 2026 100 yards away

  Erection of a first floor part rear extension to allow the conversion of the house into two self contained flats, and installation of solar panels to the front roof, with associated landscaping, bin and bike stores.

  Refused Full applications New dwelling Extension 14 docs

• 156 Cromwell Road, Hounslow, TW3 3QS

  P/2026/2698 Submitted 23 Sep 2026 100 yards away

  100% historically approved · decision due ~18 Nov

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

  Awaiting decision Lawful development Extension Loft or dormer +1 4 docs

• 420 HANWORTH ROAD, HOUNSLOW, TW3 3SN

  P/2023/0115 Submitted 12 Jan 2023 100 yards away

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

  Granted Lawful development Extension Loft or dormer +1 7 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