11 Arnold Crescent, Isleworth, TW7 7NS

1. 7 Nov 2025

   Received by Hounslow

2. 3 Dec 2025

   Validated

   Checked as complete and ready for consideration.

3. 13 Jan 2026

   Decision issued: PRIOR APPROVAL IS NOT REQUIRED

4. 12 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

Prior approval applications arise where permitted development rights already grant the principle of the work, such as larger home extensions, changes of use to housing or agricultural buildings. The council may only consider the specific matters set out in the rules, for example transport, flooding or appearance, and in many classes the work may proceed if the council does not respond within the deadline, commonly 56 days.

More on prior approval applications in our guide

• 13 Arnold Crescent, Isleworth, TW7 7NS

  P/2025/3523 Submitted 24 Nov 2025 9m 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

• 6 ARNOLD CRESCENT, ISLEWORTH, TW7 7NT

  PA/2021/2662 Submitted 29 Jun 2021 47m away

  Ground floor rear extension 6 metres deep, maximum height of 2.95 metres, 2.80 metres high to the eaves

  Granted Prior approval Extension 9 docs

• 22 Arnold Crescent, Isleworth, TW7 7NT

  P/2026/1966 Submitted 2 Jul 2026 52m away

  Erection of a two storey side extension and single storey rear extension.

  Granted Householder Extension 13 docs
  Small domestic

• 23 ARNOLD CRESCENT, ISLEWORTH, TW7 7NS

  P/2023/0064 Submitted 3 Jan 2023 55m 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

• 26 Arnold Crescent, Isleworth, TW7 7NT

  P/2026/1787 Submitted 16 Jun 2026 62m away

  Erection of a single storey rear infill extension and replacement of garage door to window at the front of the house.

  Granted Householder Extension Windows or glazing 6 docs
  Small domestic

• 25 Arnold Crescent, Isleworth, TW7 7NS

  P/2026/2503 Submitted 3 Sep 2026 68m away

  76% historically approved · decision due ~29 Oct

  Erection of a single storey rear, two storey side extension, and rear roof extension with two front roof windows to the house.

  Awaiting decision Householder Extension Windows or glazing 11 docs
  Small domestic

• PA/2026/2167 Granted

  2 Church Walk, Brentford, TW8 8DB

  Ground floor rear extension 4.50 metres deep, maximum height 4.00 metres, 3.00 metres high to the eaves.

  24 Jul 2026 Prior approval
• PA/2026/2475 Awaiting decision

  4 Upton Road, Hounslow, TW3 3HP

  GS868133219 - Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 3.00 metres high to the eaves

  1 Sep 2026 Prior approval
• PA/2026/2481 Awaiting decision

  6 Speart Lane, Hounslow, TW5 9EF

  Ground floor rear extension 8.00 metres deep, maximum height of 3.00 metres, 2.80 metres high to the eaves

  1 Sep 2026 Prior approval
• PA/2026/2458 Awaiting decision

  82 Ringway, Southall, UB2 5SU

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

  28 Aug 2026 Prior approval
• PA/2026/2461 Awaiting decision

  24 Kingston Avenue, Feltham, TW14 9SL

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

  28 Aug 2026 Prior approval