131 Thornbury Road, Isleworth, TW7 4ND

1. 26 May 2026

   Received by Hounslow

2. 22 Jul 2026

   Decision issued: GRANT

3. 26 Jul 2026

   Added to PlanIndex

Hounslow granted permission on 22 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.

• 657 Great West Road, Isleworth, TW7 4PT

  P/2026/1314 Submitted 30 Apr 2026 53m away

  77% historically approved · decision due ~9 Jul

  Erection of a rear and side roof extension with one front roof window to the house. Erection of a single storey outbuilding to the rear garden.

  Awaiting decision Householder Extension Windows or glazing 11 docs
  Small domestic

• 119 THORNBURY ROAD, ISLEWORTH, TW7 4ND

  P/2021/2277 Submitted 7 Jun 2021 71m away

  Erection of single storey rear extension following the demolition of the existing, enlargement of the existing rear roof extension and replacement of the front roof light

  Granted Householder Extension Loft or dormer +1 5 docs
  Small domestic

• 2 Thornbury Avenue, Isleworth, TW7 4NQ

  P/2026/1843 Submitted 22 Jun 2026 79m away

  Enlargement of rear and side roof extensions to the house.

  Granted Householder Extension 17 docs
  Domestic

• 115 THORNBURY ROAD, ISLEWORTH, TW7 4ND

  P/2021/3049 Submitted 21 Jul 2021 86m away

  T1: Cedar, Create 3 metres separation distance from both properties. And thin canopy by removing deadwood and crossing branches. max 10-15 %.

  Granted Trees 4 docs

• 2 CAROLINE CLOSE, ISLEWORTH, TW7 4QA

  P/2021/2986 Submitted 22 Jul 2021 93m away

  Works to two trees in TPO no. 141: T1 Ash Tree (Inonotus hispidus):- Fell to ground level; T2 Poplar:- Fell to ground level

  Granted Trees 4 docs

• 2 Caroline Close, Isleworth, TW7 4QA

  P/2026/2395 Submitted 18 Aug 2026 93m away

  98% historically approved · decision due ~16 Oct

  Works to trees in a TPO area; T1 TPO 141 Lime Tree to re pollard and T2 TPO 141 Lime, to re pollard.

  Awaiting decision Trees 4 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