5 Thornton Avenue, Chiswick, London, W4 1QE

This site has had 2 applications since 2026: 2 approved, 0 refused.

• P/2026/0156 Granted

  5 Thornton Avenue, Chiswick, London, W4 1QE

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

  Decided 20 Apr 2026 Householder

1. 3 Feb 2026

   Received by Hounslow

2. 17 Mar 2026

   Decision issued: GRANT

3. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 17 March 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.

• 5 Thornton Avenue, Chiswick, London, W4 1QE

  P/2026/0156 Submitted 19 Jan 2026 50 yards away

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

  Granted Householder Extension 9 docs
  Small domestic

• 4-6 THORNTON AVENUE, CHISWICK, LONDON, W4 1QG

  P/2021/3442 Submitted 24 Aug 2021 50 yards away

  Variation of condition 1 (Approved Plans) to propose a storage space beneath the front garden path following 01122/4-6/P2 dated 23/12/2020 for Variation of condition 2 (approved plans) to allow the increase in size of the basement to the front and with a front lightwell to No 4 of planning permission 01122/4-6/P1 approved 15/07/2014 for the Joint application for a change of use of No. 4 from 5 bedsits and 1 studio flat to a single family dwelling and erection of single storey rear and side infill extensions and formation of rear basement extension with lightwell to both No. 4 and No. 6.

  Granted Full applications Extension 9 docs
  Small domestic

• 17 THORNTON AVENUE, CHISWICK, LONDON, W4 1QE

  P/2021/2219 Submitted 27 May 2021 50 yards away

  Details submitted pursuant of Condition 6 (construction method statement) and 7 (construction management plan) following planning permission 01122/17/P1 dated 07/09/2020 for enlargement of existing basement including creation of a front light well, replacement of front rooflight and addition of railings to front roof gable.

  Granted Conditions Loft or dormer 6 docs

• 22 THORNTON AVENUE, CHISWICK, W4 1QG

  P/2019/3933 Submitted 29 Oct 2019 50 yards away

  Erection of a single storey part side and rear extension, erection of a rear outrigger roof extension with increase in height of the chimney stack, installation of replacement double glazed windows to the house

  Refused Householder Extension Windows or glazing 16 docs
  Small domestic

• 132 Chiswick High Road, Chiswick, London, W4 1PU

  P/2025/3419 Submitted 14 Nov 2025 50 yards away

  Creation of an outdoor seating area with balustrade enclosure to the front of the restaurant with alterations to two of the six front panels to existing shopfront.

  Refused Full applications Windows or glazing 29 docs

• 12 Mayfield Avenue, Chiswick, London, W4 1PW

  P/2024/3733 Submitted 9 Nov 2024 50 yards away

  Erection of a single storey rear extension.

  Granted Householder Extension 14 docs
  Small domestic

• 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