109 Wood Lane, Isleworth, TW7 5EG

1. 9 Sep 2026

   Received by Hounslow

2. 11 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 17 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 6 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 55 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.

• 115 Roxborough Avenue, Isleworth, TW7 5HH

  P/2026/1372 Submitted 6 May 2026 78m away

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

  Granted Lawful development Extension Loft or dormer +1 8 docs

• 115 Roxborough Avenue, Isleworth, TW7 5HH

  P/2026/2474 Submitted 1 Sep 2026 78m away

  77% historically approved · decision due ~29 Oct

  Erection of a single storey rear extension, front porch extension, part side extension and first floor side extension to the house.

  Awaiting decision Householder Extension 7 docs
  Small domestic

• 91 Wood Lane, Isleworth, TW7 5EG

  P/2025/2883 Submitted 25 Sep 2025 81m away

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

  Granted Lawful development Extension Loft or dormer +1 9 docs

• 109 ROXBOROUGH AVENUE, ISLEWORTH, TW7 5HH

  P/2021/2808 Submitted 9 Jul 2021 104m away

  Erection of a single storey rear infill extension.

  Granted Householder Extension 5 docs
  Small domestic

• LANCASTER HOUSE BOROUGH ROAD, ISLEWORTH, TW7 5FJ

  P/2023/0288 Submitted 30 Jan 2023 153m away

  Work to tree within conservation area Maple (T1) - Whole crown reduction to a height of approximately 13m from ground

  Granted Trees 4 docs

• Flat 44, Lancaster House Borough Road, Isleworth, TW7 5FJ

  P/2025/0035 Submitted 3 Jan 2025 153m away

  Listed building consent for the installation of double glazed windows to the flat

  Withdrawn Heritage and listed buildings Windows or glazing 1 doc

• 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.

  20 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.

  10 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.

  12 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.

  17 Jul 2026 Lawful development
• P/2026/2564 Awaiting decision

  2 Church Walk, Brentford, TW8 8DB

  Certificate of lawfulness for the proposed erection of a single storey rear extension and rear roof extension with three roof windows to the front.

  9 Sep 2026 Lawful development