16 MANDEVILLE ROAD, ISLEWORTH, TW7 6AD

1. 7 Mar 2023

   Received by Hounslow

2. 26 Apr 2023

   Decision issued: REFUSED (FULL PLANNING PERMISSION REQUIRED)

3. 2 Sep 2026

   Added to PlanIndex

This application is at appeal, which passes the decision from Hounslow to the planning inspectorate, and the outcome will replace the council's decision. 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.

• 4 MANDEVILLE ROAD, ISLEWORTH, TW7 6AD

  P/2021/3368 Submitted 18 Aug 2021 50 yards away

  Certificate of Lawfulness for the erection of rear roof extension incorporating hip to gable conversion and two front roof windows to the house

  Granted Lawful development Extension Loft or dormer +1 6 docs

• 193 LINKFIELD ROAD, ISLEWORTH, TW7 6QY

  P/2023/1105 Submitted 6 Apr 2023 100 yards away

  Certificate of Lawfulness for erection of a rear roof extension with front roof windows

  Granted Lawful development Extension Windows or glazing 7 docs

• 38 Mandeville Road, Isleworth, TW7 6AD

  P/2026/2699 Submitted 23 Sep 2026 100 yards away

  75% historically approved · decision due ~24 Nov

  Erection of a single storey front extension and conversion of the garage to a habitable room.

  Awaiting decision Householder Extension 8 docs
  Small domestic

• 2 Mill Plat Avenue, Isleworth, TW7 6RD

  P/2026/2726 Submitted 28 Sep 2026 150 yards away

  100% historically approved · decision due ~23 Nov

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

  Awaiting decision Lawful development Extension 6 docs

• 29 SMALLBERRY AVENUE, ISLEWORTH, TW7 6QL

  P/2023/0229 Submitted 24 Jan 2023 150 yards away

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

  Granted Householder Extension 9 docs
  Small domestic

• 54 Amhurst Gardens, Isleworth, TW7 6AJ

  PA/2026/2126 Submitted 21 Jul 2026 200 yards away

  Ground floor rear extension 6.00 metres deep, maximum height 3.20 metres, 3.00 metres high to the eaves.

  Refused Prior approval Extension 8 docs

• P/2026/2813 Awaiting decision

  150 Wood Lane, Isleworth, TW7 5EQ

  (GSGS877009741) Certificate of lawfulness proposed for the erection of a single storey outbuilding to be used as a home gym / playroom / shed in the rear garden of the house

  Received 5 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2334 Granted

  69 Central Avenue, Hounslow, TW3 2QW

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

  Received 12 Aug, published by the council 16 Aug 2026 Lawful development
• P/2026/2459 Granted

  2 Letchworth Avenue, Feltham, TW14 9RY

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

  Received 28 Aug, published by the council 5 Sep 2026 Lawful development
• P/2026/2787 Awaiting decision

  13 Denbigh Road, Hounslow, TW3 4DU

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

  Received 1 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2790 Awaiting decision

  14 Old Farm Close, Hounslow, TW4 7AB

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

  Received 1 Oct, published by the council 6 Oct 2026 Lawful development