8 The Close, Isleworth, TW7 4BL

1. 17 Aug 2026

   Received by Hounslow

2. 23 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 12 October 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 55 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.

• 3 HERBERT PLACE, ISLEWORTH, TW7 4BU

  P/2021/3321 Submitted 16 Aug 2021 57m away

  Certificate of Lawfulness for the erection of a single storey rear extension to the house

  Refused Lawful development Extension 7 docs
  Small domestic

• 204 Spring Grove Road, Isleworth, TW7 4BG

  P/2024/3082 Submitted 16 Sep 2024 86m away

  Proposal for the erection of a first-floor rear infill extension, side and rear dormers, conversion of a pitch to crown roof, lowering of eaves height to side addition.

  Granted Householder Extension Loft or dormer 19 docs
  Domestic

• 26 Worton Gardens, Isleworth, TW7 4BB

  P/2026/0616 Submitted 23 Feb 2026 90m 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 5 docs

• 50 Worton Gardens, Isleworth, TW7 4BB

  P/2025/3136 Submitted 17 Oct 2025 118m away

  Details of condition 12 energy and sustainability of planning permission P/2025/0671 approved 27/05/2025 for erection of a self/custom build two storey detached house in the rear garden with associated landscaping, cycle and refuse storage following the demolition of the existing outbuilding.

  Granted Conditions New dwelling Demolition 4 docs

• 11 Worton Gardens, Isleworth, TW7 4BD

  PA/2024/3304 Submitted 3 Oct 2024 120m away

  Ground floor rear extension 6.00 metres deep, maximum height 3.10 metres, 3.00 metres high to the eaves.

  Granted Prior approval Extension 11 docs

• 11 Worton Gardens, Isleworth, TW7 4BD

  P/2024/3303 Submitted 3 Oct 2024 120m away

  Certificate of Lawfulness for the proposed erection of a detached outbuilding in the rear garden.

  Granted Lawful development 4 docs

• P/2026/2033 Granted

  3 Benedict Drive, Feltham, TW14 8JH

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

  8 Jul 2026 Lawful development
• P/2026/2027 Granted

  115 Northumberland Crescent, Feltham, TW14 9SP

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

  8 Jul 2026 Lawful development
• P/2026/2009 Granted

  3 Brainton Avenue, Feltham, TW14 0AZ

  Certificate of lawfulness for the proposed erection of a rear roof extension and Juliette balcony with front roof windows to the house.

  7 Jul 2026 Lawful development
• P/2026/2014 Granted

  82 Sussex Avenue, Isleworth, TW7 6LB

  Certificate of lawfulness for the proposed erection of a rear roof extension, a porch to the front of the house, and a front roof window.

  7 Jul 2026 Lawful development
• P/2026/2473 Awaiting decision

  16 Somerset Waye, Hounslow, TW5 9HG

  Certificate of lawfulness for the proposed erection of a rear roof extension with two roof windows to the front and alterations to the existing side roof from flat roof to pitched roof.

  1 Sep 2026 Lawful development