18 Osterley Avenue, Isleworth, TW7 4QF

1. 20 May 2026

   Received by Hounslow

2. 15 Jul 2026

   Decision issued: APPROVED

3. 26 Jul 2026

   Added to PlanIndex

Hounslow granted permission on 15 July 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.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 13 OSTERLEY AVENUE, ISLEWORTH, TW7 4QF

  PA/2021/2645 Submitted 28 Jun 2021 50 yards away

  Ground floor rear extension 5 metres deep, maximum height of 3.5 metres, 2.95 metres high to the eaves.

  Granted Prior approval Extension 5 docs

• 21 Thornbury Avenue, Isleworth, TW7 4NF

  P/2025/2580 Submitted 21 Aug 2025 150 yards away

  Installation of render the front and side elevation and installation of external wall insulation and render to the rear elevation of the house.

  Granted Householder 7 docs
  Domestic

• 23 Thornbury Avenue, Isleworth, TW7 4NF

  P/2025/3117 Submitted 15 Oct 2025 150 yards away

  Retrospective permission for the existing rear canopy.

  Granted Householder 7 docs
  Domestic

• 31 THORNBURY AVENUE, ISLEWORTH, TW7 4NF

  P/2023/0164 Submitted 17 Jan 2023 150 yards away

  Retrospective application for the erection of a single storey side and part rear extension, roof extension with rear and side dormers and roof windows; changes to front boundary wall, rendering of external walls and replacement windows and doors.

  Refused Householder Extension Loft or dormer +1 9 docs
  Small domestic

• 4 St Marys Crescent, Isleworth, TW7 4NA

  P/2026/0591 Submitted 19 Feb 2026 150 yards away

  Erection of a first-floor rear infill extension, loft conversion, and increase to the roof ridge height.

  Granted Householder Extension Loft or dormer +1 6 docs
  Domestic

• 24 THORNBURY AVENUE, ISLEWORTH, TW7 4NQ

  P/2021/2046 Submitted 24 May 2021 200 yards away

  Variation of Condition 2 (approved plans) and Condition 3 (no additional windows and doors) to improve the appearance and utility of the extension of planning application 01118/24/P1 approved under appeal dated 30/11/2020 for erection of single storey rear extension and side and rear roof dormer extensions with one front roof window to the house and alteration to fenestration.

  Granted Householder Extension Loft or dormer +1 5 docs
  Small domestic

• P/2026/2623 Awaiting decision

  8 Lonsdale Road,Chiswick,W4 1ND

  Installation of external condenser at first floor level.

  Received 15 Sep, published by the council 17 Sep 2026 Householder
• P/2026/2125 Granted

  36 Midsummer Avenue, Hounslow, TW4 5BB

  Erection of a single storey rear extension and a single storey side extension following the demolition of the existing side garage.

  Received 21 Jul, published by the council 30 Jul 2026 Householder
• P/2026/2615 Awaiting decision

  48 Meadow Waye, Hounslow, TW5 9EZ

  Erection of a part first floor rear extension.

  Received 14 Sep, published by the council 17 Sep 2026 Householder
• P/2026/2619 Awaiting decision

  12 Letchworth Avenue, Feltham, TW14 9RY

  Erection of a single storey rear extension.

  Received 14 Sep, published by the council 17 Sep 2026 Householder
• P/2026/2600 Awaiting decision

  310 Lionel Road North, Brentford, TW8 9QX

  Erection of a rear roof extension.

  Received 14 Sep, published by the council 17 Sep 2026 Householder