156 Cromwell Road, Hounslow, TW3 3QS

1. 23 Sep 2026

   Received by Hounslow

2. 27 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 18 November 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Hounslow took a median of 56 days over the applications it decided in the last year.

This application is with Hounslow for determination, against a statutory target of eight weeks. Over the last year Hounslow decided lawful development applications in a median of 56 days. More in our guide to how long planning decisions take.

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.

• 207 CROMWELL ROAD, HOUNSLOW, TW3 3QW

  PA/2023/0830 Submitted 14 Mar 2023 50 yards away

  Ground floor rear extension 5.00 metres deep, maximum height 3.00 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 9 docs

• 237 Cromwell Road, Hounslow, TW3 3QT

  P/2025/2671 Submitted 3 Sep 2025 100 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 100 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

• 241 Cromwell Road,Hounslow,TW3 3QT

  P/2024/3583 Submitted 24 Oct 2024 100 yards away

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

  Refused Full applications 9 docs

• 12 PENDEREL ROAD, HOUNSLOW, TW3 3QR

  PA/2021/2894 Submitted 15 Jul 2021 100 yards away

  Ground floor extension 6.00 metres deep, maximum height 3.7 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 8 docs

• 247 Cromwell Road, Hounslow, TW3 3QT

  P/2025/3322 Submitted 5 Nov 2025 100 yards away

  Certificate of lawfulness proposed for the erection of a rear roof and outrigger extension with two front roof windows and a single storey infill and rear extension to the house.

  Granted Lawful development Extension Windows or glazing 4 docs
  Small domestic

• 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