Block D and K Primrose Place,Isleworth,London,TW7 5BA

1. 12 May 2026

   Received by Hounslow

2. 25 Jun 2026

   Validated

   Checked as complete and ready for consideration.

3. 26 Jul 2026

   Added to PlanIndex

4. 17 Aug 2026

   Decision issued: GRANT

5. 23 Aug 2026

   Status changed to REGISTERED: Pending recommendation

   Previously REGISTERED: Under Assessment.

Hounslow granted permission on 17 August 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 8 Smallberry Avenue, Isleworth, TW7 6QL

  P/2026/0864 Submitted 16 Mar 2026 100 yards away

  Certificate of lawfulness for the existing use of the site as two self contained residential units.

  Granted Lawful development 5 docs

• 429 LONDON ROAD, ISLEWORTH, TW7 5AQ

  P/2021/2889 Submitted 15 Jul 2021 100 yards away

  Erection of a single storey rear extension.

  Granted Householder Extension 7 docs
  Small domestic

• 8 Alton Close, Isleworth, TW7 6AL

  P/2024/3818 Submitted 15 Nov 2024 100 yards away

  Certificate of Lawfulness for the proposed erection of a single storey detached outbuilding as an office in rear garden.

  Granted Lawful development 5 docs
  Small domestic

• 421 LONDON ROAD, ISLEWORTH, TW7 5AQ

  P/2021/2276 Submitted 7 Jun 2021 100 yards away

  Erection of a two-bedroom house on the side plot with associated landscaping, refuse provision, car and cycle parking provision

  Refused Full applications 17 docs

• 6 Alton Close, Isleworth, TW7 6AL

  P/2025/2854 Submitted 23 Sep 2025 100 yards away

  Certificate of Lawfulness for erection of a rear roof extension with a hip to gable conversion, and three front roof windows to the house.

  Granted Lawful development Extension Loft or dormer +1 20 docs

• 6 Alton Close, Isleworth, TW7 6AL

  P/2025/0931 Submitted 24 Mar 2025 100 yards 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.

  Withdrawn Lawful development Extension Loft or dormer +1 20 docs

• P/2026/2118 Granted

  54 Amhurst Gardens, Isleworth, TW7 6AJ

  Certificate of lawfulness for the proposed erection of a rear roof extension with front roof windows.

  Received 20 Jul, published by the council 26 Jul 2026 Lawful development
• P/2026/2580 Awaiting decision

  50B Paxton Road, Chiswick, London, W4 2QX

  Certificate of lawfulness for the existing use of a first floor self contained flat.

  Received 10 Sep, published by the council 17 Sep 2026 Lawful development
• P/2026/2332 Granted

  43 Dawes Avenue, Isleworth, TW7 7JS

  Certificate of Lawfulness for the proposed hip to gable conversion, front roof lights and erection of a rear roof extension to the house.

  Received 12 Aug, published by the council 16 Aug 2026 Lawful development
• P/2026/2089 Granted

  18 Central Avenue, Hounslow, TW3 2QH

  Certificate of lawfulness for the existing use of the rear extension as a self contained flat.

  Received 17 Jul, published by the council 26 Jul 2026 Lawful development
• P/2026/2566 Awaiting decision

  109 Wood Lane, Isleworth, TW7 5EG

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

  Received 9 Sep, published by the council 17 Sep 2026 Lawful development