42 Cambridge Road, Hounslow, TW4 7BS

1. 13 Nov 2025

   Received by Hounslow

2. 4 Dec 2025

   Decision issued: GRANT

3. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 4 December 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.

• 20 CAMBRIDGE ROAD, HOUNSLOW, TW4 7BS

  P/2019/3874 Submitted 25 Oct 2019 100 yards away

  Certificate of Lawfulness for the erection of a hip to gable and rear roof extension with two front roof windows to the house

  Withdrawn Lawful development Extension Loft or dormer +1 4 docs

• 78 CAMBRIDGE ROAD, HOUNSLOW, TW4 7BH

  P/2023/0191 Submitted 19 Jan 2023 100 yards away

  Erection of a single storey side and rear extension to the existing detached outbuilding

  Granted Householder Extension 9 docs
  Small domestic

• 17 THE GREENWAY, HOUNSLOW, TW4 7AJ

  P/2021/2632 Submitted 28 Jun 2021 100 yards away

  Erection of a single storey rear extension to the house

  Granted Householder Extension 7 docs
  Small domestic

• 17 Ashton Gardens, Hounslow, TW4 7BU

  P/2026/2405 Submitted 20 Aug 2026 100 yards away

  64% historically approved · decision due ~6 Nov

  Erection of a front porch extension. Formation of a vehicular access and extension and reconfiguration of an existing vehicular access. Erection of a two storey house with associated amenity space, car parking, cycle & refuse storage.

  Awaiting decision Full applications Extension 15 docs
  Small domestic

• 17 Ashton Gardens, Hounslow, TW4 7BU

  P/2026/1223 Submitted 21 Apr 2026 100 yards away

  Erection of a front proch extension and single storey rear extension to the existing house. Formation of a vehicular access. Erection of a two storey house with associated amenity space, car parking, cycle and refuse storage.

  Refused Full applications Extension 20 docs
  Small domestic

• 15 THE GREENWAY, HOUNSLOW, TW4 7AJ

  PA/2021/2906 Submitted 16 Jul 2021 100 yards away

  Ground floor rear extension 6.00 metres deep, maximum height 3.80 metres, 2.60 metres high to the eaves

  Granted Prior approval Extension 4 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