851-853 Great West Road Isleworth TW7 5PD

1. 20 Apr 2026

   Received by Hounslow

2. 22 Apr 2026

   Validated

   Checked as complete and ready for consideration.

3. 28 May 2026

   Decision issued: PRIOR APPROVAL DOES NOT COMPLY

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

• 851-853 Great West Road, Isleworth, TW7 5PD

  P/2026/2034 Submitted 8 Jul 2026 0m away

  76% historically approved · decision due ~17 Sep

  Erection of a single storey rear extension

  Awaiting decision Householder Extension 5 docs
  Small domestic

• 851-853 Great West Road, Isleworth, TW7 5PD

  P/2026/1317 Submitted 30 Apr 2026 0m away

  Erection of a single storey rear extension and part first floor rear extension to 851-53 Great West Road. Erection of a first floor side extension to 851 Great West Road.

  Withdrawn Householder Extension 3 docs
  Small domestic

• 67 Roxborough Avenue, Isleworth, TW7 5HQ

  P/2026/0364 Submitted 5 Feb 2026 80m away

  Erection of a two storey side extension and a single storey rear extension to the house

  Granted Householder Extension 8 docs
  Small domestic

• 851 - 853 Great West Road, Isleworth, TW7 5PD

  P/2026/2233 Submitted 30 Jul 2026 85m away

  76% historically approved · decision due ~15 Oct

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

  Awaiting decision Householder Extension 5 docs
  Small domestic

• 850-852 GREAT WEST ROAD, ISLEWORTH, TW7 5NG

  P/2021/2546 Submitted 22 Jun 2021 95m away

  Erection of part single storey rear extensions to Flats B at both properties .

  Refused Full applications New dwelling Extension 5 docs
  Small domestic

• 38 ROXBOROUGH AVENUE, ISLEWORTH, TW7 5HJ

  P/2021/2421 Submitted 15 Jun 2021 106m away

  Conversion of the garage into a habitable room of the house

  Granted Householder 6 docs
  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