23 Elmgate Avenue, Feltham, TW13 7BU

1. 15 Sep 2026

   Received by Hounslow

2. 20 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 10 November 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 56 days over the applications it decided in the last year.

This application is with Hounslow for determination, against a statutory target of eight weeks. Over the last year Hounslow decided lawful development applications in a median of 55 days. More in our guide to how long planning decisions take.

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.

• 161 Fernside Avenue, Feltham, TW13 7BQ

  P/2026/0566 Submitted 18 Feb 2026 50 yards away

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

  Granted Lawful development Extension Windows or glazing 9 docs

• 161 Fernside Avenue, Feltham, TW13 7BQ

  PA/2026/0561 Submitted 17 Feb 2026 50 yards away

  Ground floor rear extension 6.00 metres deep, maximum height of 3.75 metres, 2.96 metres high to the eaves

  Granted Prior approval Extension 9 docs

• 18 Camrose Avenue, Feltham, TW13 7DA

  PA/2024/3362 Submitted 7 Oct 2024 50 yards away

  Ground floor rear extension 4.30 metres deep, maximum height 2.85 metres, 2.70 metres high to the eaves

  Granted Prior approval Extension 7 docs

• 189 FERNSIDE AVENUE, FELTHAM, TW13 7BQ

  P/2021/1865 Submitted 11 May 2021 100 yards away

  Certificate of Lawfulness for the erection of a hip to gable and rear roof extension with three front roof windows and replacement of flat roof of existing two storey side extension with pitched roof to the house

  Granted Lawful development Extension Loft or dormer +1 8 docs

• 136 Fernside Avenue, Feltham, TW13 7BW

  P/2026/1883 Submitted 24 Jun 2026 100 yards away

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

  Granted Lawful development Extension 6 docs
  Small domestic

• 136 Fernside Avenue, Feltham, TW13 7BW

  P/2026/1153 Submitted 14 Apr 2026 100 yards away

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

  Withdrawn Householder Extension 3 docs
  Small domestic

• P/2026/2651 Awaiting decision

  3 Clayponds Avenue, Brentford, TW8 9QQ

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

  Received 17 Sep, published by the council 20 Sep 2026 Lawful development
• P/2026/2631 Awaiting decision

  17 Northumberland Avenue, Isleworth, TW7 5HZ

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

  Received 15 Sep, published by the council 20 Sep 2026 Lawful development
• P/2026/2606 Awaiting decision

  35 Jersey Road, Hounslow, TW3 4BQ

  Certificate of Lawfulness for the Existing Continued Use as a Five Bedroom House in Multiple Occupation (HMO).

  Received 14 Sep, published by the council 20 Sep 2026 Lawful development
• P/2026/2609 Awaiting decision

  47 Sutton Road, Hounslow, TW5 0PN

  Certificate of lawfulness for the proposed erection of a detached outbuilding in the rear garden.

  Received 14 Sep, published by the council 20 Sep 2026 Lawful development
• 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