25 Arnold Crescent, Isleworth, TW7 7NS

1. 3 Sep 2026

   Received by Hounslow

2. 5 Sep 2026

   Added to PlanIndex

3. 30 Sep 2026

   Status changed to REGISTERED: Under Assessment

   Previously REGISTERED: Under Consultation.

4. Decision

   Awaiting decision

   Decision expected by 29 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 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 householder applications in a median of 63 days. More in our guide to how long planning decisions take.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 27 Arnold Crescent, Isleworth, TW7 7NS

  P/2024/3295 Submitted 2 Oct 2024 50 yards away

  Proposal for the erection of a hip to gable conversion, rear dormer and three roof windows

  Refused Householder Loft or dormer Windows or glazing 9 docs
  Domestic

• 23 ARNOLD CRESCENT, ISLEWORTH, TW7 7NS

  P/2023/0066 Submitted 3 Jan 2023 50 yards away

  Certificate of Lawfulness for 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 10 docs

• 23 ARNOLD CRESCENT, ISLEWORTH, TW7 7NS

  P/2023/0064 Submitted 3 Jan 2023 50 yards away

  Erection of a part single, part two storey rear extension and two storey side extension following the demolition of the existing garage

  Granted Householder Extension Demolition 16 docs
  Domestic

• 36 Arnold Crescent, Isleworth, TW7 7NT

  P/2025/2813 Submitted 18 Sep 2025 50 yards away

  Retrospective application for a single storey rear extension to the house

  Granted Householder Extension 9 docs
  Small domestic

• 212 WHITTON DENE, ISLEWORTH, TW7 7LU

  P/2021/2457 Submitted 17 Jun 2021 50 yards away

  Erection of a first floor side extension and a single storey rear extension.

  Granted Householder Extension 4 docs
  Small domestic

• 210 Whitton Dene, Isleworth, TW7 7LU

  P/2026/2150 Submitted 22 Jul 2026 50 yards away

  75% historically approved · decision due ~29 Oct

  Erection of a single storey detached outbuilding.

  Awaiting decision Householder 6 docs
  Small domestic

• P/2026/2304 Granted

  18 Clifden Road, Brentford, TW8 0PF

  Erection of a side and rear extensions.

  Received 7 Aug, published by the council 12 Aug 2026 Householder
• P/2026/2804 Awaiting decision

  128 Durham Road, Feltham, TW14 0AE

  Erection of a detached outbuilding in the rear garden following demolition of existing shed.

  Received 2 Oct, published by the council 9 Oct 2026 Householder
• P/2026/2301 Granted

  4 Glebe Street, Chiswick, W4 2BG

  Erection of a front side and rear side infill extensions with alterations to the rear elevation, a rear side first floor infill extension with replacement of windows to the rear elevation and installation of new rooflights to the existing ground floor infill extension of the house

  Received 7 Aug, published by the council 16 Aug 2026 Householder
• P/2026/1167 Granted

  20 Firs Drive, Hounslow, TW5 9TD

  Erection of part one, part two-storey side extension following demolition of existing garage and part one, part two-storey rear extension. Raising of roof ridge, erection of rear roof extensions, and installation of one front roof window.

  Received 15 Apr, published by the council 26 Jul 2026 Householder
• P/2026/2025 Granted

  1 Kneller Gardens, Isleworth, TW7 7NP

  Erection of a single storey rear and first floor side extension incorporating the conversion of the existing garage to a habitable room

  Received 8 Jul, published by the council 26 Jul 2026 Householder