56 Summerhouse Avenue, Hounslow, TW5 9DF

1. 7 May 2026

   Received by Hounslow

2. 29 May 2026

   Validated

   Checked as complete and ready for consideration.

3. 8 Jul 2026

   Decision issued: GRANT

4. 26 Jul 2026

   Added to PlanIndex

Hounslow granted permission on 8 July 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.

• 45 Summerhouse Avenue, Hounslow, TW5 9DJ

  P/2026/1079 Submitted 31 Mar 2026 50 yards away

  77% historically approved · decision due ~26 May

  Erection of single storey rear and front porch extension to the house.

  Awaiting decision Householder Extension 3 docs
  Small domestic

• 45 Summerhouse Avenue, Hounslow, TW5 9DJ

  P/2025/3466 Submitted 18 Nov 2025 50 yards away

  Erection of single storey rear and front porch extension to the house.

  Withdrawn Householder Extension 3 docs
  Small domestic

• 2 St Leonards Gardens, Hounslow, TW5 9DH

  PA/2025/3784 Submitted 22 Dec 2025 100 yards away

  Ground floor rear extension 6.00 metres deep, maximum height of 3.20 metres, 2.90 metres high to the eaves

  Refused Prior approval Extension 9 docs

• 39 Summerhouse Avenue, Hounslow, TW5 9DJ

  P/2025/2789 Submitted 17 Sep 2025 100 yards away

  Erection of single storey front porch extension to the house.

  Granted Householder Extension 5 docs
  Small domestic

• 66 Victoria Gardens, Hounslow, TW5 9DE

  P/2025/2882 Submitted 24 Sep 2025 100 yards away

  Certificate of lawfulness for the proposed erection of a detached single storey outbuilding to the rear of the house.

  Granted Lawful development 6 docs
  Small domestic

• 35 Summerhouse Avenue, Hounslow, TW5 9DJ

  P/2024/3743 Submitted 11 Nov 2024 100 yards away

  Erection of a hip to gable and rear roof extension to allow the change of use from a single family house (C3) to a House in Multiple Occupation (C4) for up to six people

  Withdrawn Full applications Extension Loft or dormer 15 docs

• P/2026/2118 Granted

  54 Amhurst Gardens, Isleworth, TW7 6AJ

  Certificate of lawfulness for the proposed erection of a rear roof extension with front roof windows.

  Received 20 Jul, published by the council 26 Jul 2026 Lawful development
• P/2026/2580 Awaiting decision

  50B Paxton Road, Chiswick, London, W4 2QX

  Certificate of lawfulness for the existing use of a first floor self contained flat.

  Received 10 Sep, published by the council 17 Sep 2026 Lawful development
• P/2026/2332 Granted

  43 Dawes Avenue, Isleworth, TW7 7JS

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

  Received 12 Aug, published by the council 16 Aug 2026 Lawful development
• P/2026/2089 Granted

  18 Central Avenue, Hounslow, TW3 2QH

  Certificate of lawfulness for the existing use of the rear extension as a self contained flat.

  Received 17 Jul, published by the council 26 Jul 2026 Lawful development
• P/2026/2566 Awaiting decision

  109 Wood Lane, Isleworth, TW7 5EG

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

  Received 9 Sep, published by the council 17 Sep 2026 Lawful development