65 Sidmouth Avenue, Isleworth, TW7 4DR

1. 27 Sep 2024

   Received by Hounslow

2. 21 Nov 2024

   Decision issued: LAWFNOTGRANT

3. 3 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 21 November 2024, 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.

• 7 SIDMOUTH AVENUE, ISLEWORTH, TW7 4DW

  PA/2023/0610 Submitted 23 Feb 2023 24m away

  Ground floor rear extension 4.00 metres deep, maximum height 3.54 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 5 docs

• 8 Sidmouth Avenue, Isleworth, TW7 4DW

  P/2025/3413 Submitted 13 Nov 2025 32m away

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

  Granted Lawful development Extension Windows or glazing 8 docs

• 47 Sidmouth Avenue, Isleworth, TW7 4DR

  P/2024/3461 Submitted 16 Oct 2024 65m away

  Certificate of Lawfulness for the proposed erection of a single storey rear extension to the house.

  Granted Lawful development Extension 6 docs
  Small domestic

• 14 SIDMOUTH AVENUE, ISLEWORTH, TW7 4DW

  P/2021/2208 Submitted 3 Jun 2021 69m away

  Certificate of Lawfulness for proposed erection of a rear roof extension incorporating hip to gable conversion and two front roof windows; Alterations to the existing ground floor rear extension comprising of the removal of the existing opens and installation of one new window and French doors to the house

  Granted Lawful development Extension Loft or dormer +1 5 docs

• 16 Sidmouth Avenue, Isleworth, TW7 4DW

  PA/2026/1784 Submitted 16 Jun 2026 81m away

  Ground floor rear extension 5.00 metres deep, maximum height of 3.20 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 7 docs

• Land on London Road to the side of Grove House, 76 Sidmouth Avenue, Isleworth, TW7 4FQ

  P/2026/1361 Submitted 9 Apr 2026 122m away

  Installation of one telecommunication Street Hub and removal of associated payphones.

  Refused Full applications 13 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