25 Arnold Crescent, Isleworth, TW7 7NS

1. 3 Sep 2026

   Received by Hounslow

2. 5 Sep 2026

   Added to PlanIndex

3. 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 55 days over the applications it decided in the last year.

This application is with Hounslow for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 27 Arnold Crescent, Isleworth, TW7 7NS

  P/2024/3295 Submitted 2 Oct 2024 6m 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/2023/0064 Submitted 3 Jan 2023 13m 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 50m 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 52m away

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

  Granted Householder Extension 4 docs
  Small domestic

• 13 Arnold Crescent, Isleworth, TW7 7NS

  P/2025/3523 Submitted 24 Nov 2025 67m away

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

  Granted Lawful development Extension Loft or dormer +1 6 docs
  Small domestic

• 11 Arnold Crescent, Isleworth, TW7 7NS

  PA/2025/3346 Submitted 7 Nov 2025 68m away

  Ground floor rear extension 4.50 metres deep, maximum height 3.00 metres, 3.00 metres high to the eaves.

  Granted Prior approval Extension 7 docs

• P/2026/2047 Granted

  9 Borough Road, Isleworth, TW7 5DY

  Erection of a single storey rear extension.

  10 Jul 2026 Householder
• P/2026/1858 Granted

  8 CONNAUGHT AVENUE, HOUNSLOW, TW4 5BW

  Erection of single storey front extension to the outbuilding for used as storage, office and a Gym. Following part demolition of the outbuilding.

  23 Jun 2026 Householder
• P/2026/1522 Granted

  4 Camborne Way, Hounslow, TW5 0PW

  Erection of a single storey rear extension and reduction in width of the existing side and rear extension.

  20 May 2026 Householder
• P/2026/2024 Granted

  20 Hartland Road, Isleworth, TW7 6RH

  Erection of a rear roof extension with windows to the front of the house.

  8 Jul 2026 Householder
• P/2026/2497 Awaiting decision

  170 Gunnersbury Avenue (north Circular Road),Hounslow,W3 8LB

  Erection of a single storey detached outbuilding.

  2 Sep 2026 Householder