24 THORNBURY AVENUE, ISLEWORTH, TW7 4NQ

This site has had 3 applications since 2021: 1 approved, 2 refused.

• P/2025/3152 Refused

  24 Thornbury Avenue, Isleworth, TW7 4NQ

  Change of use from a residential house (C3) to a Large House in Multiple Occupation (Sui Generis).

  Decided 17 Apr 2026 Full applications
• P/2021/2046 Granted

  24 THORNBURY AVENUE, ISLEWORTH, TW7 4NQ

  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.

  Decided 19 Jul 2021 Householder

1. 24 Aug 2021

   Received by Hounslow

2. 21 Sep 2021

   Decision issued: NON MATERIAL AMENDMENT REFUSED

3. 30 Sep 2026

   Added to PlanIndex

Hounslow refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

• 24 THORNBURY AVENUE, ISLEWORTH, TW7 4NQ

  P/2021/2046 Submitted 24 May 2021 50 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

• 24 Thornbury Avenue, Isleworth, TW7 4NQ

  P/2025/3152 Submitted 20 Oct 2025 50 yards away

  Change of use from a residential house (C3) to a Large House in Multiple Occupation (Sui Generis).

  Refused Full applications 12 docs

• 28 Thornbury Avenue, Isleworth, TW7 4NQ

  P/2024/1877 Submitted 6 Jun 2024 50 yards away

  Erection of a single storey rear infill replacing the existing conservatory, part single storey rear extension, side and rear roof extension and detached outbuilding at the rear of the garden

  Granted Full applications Extension 26 docs
  Small domestic

• 30 Thornbury Avenue, Isleworth, TW7 4NQ

  P/2026/1623 Submitted 1 Jun 2026 50 yards away

  Works to tree in a Conservation Area. T1. Apple. Fell to ground level and grind out stump. Rear garden (east boundary)

  Granted Trees 4 docs

• 30 THORNBURY AVENUE, ISLEWORTH, TW7 4NQ

  P/2021/2257 Submitted 7 Jun 2021 50 yards away

  T1-T4. Ash - Fell to ground level and poison stump with Eco-plugs to prevent re-growth

  Granted Trees 6 docs

• 23 Thornbury Avenue, Isleworth, TW7 4NF

  P/2025/3117 Submitted 15 Oct 2025 50 yards away

  Retrospective permission for the existing rear canopy.

  Granted Householder 7 docs
  Domestic

• P/2026/2730 Awaiting decision

  106 Bassett Gardens, Isleworth, TW7 4QY

  Non-Material Amendment to add a side window on the ground floor extension pursuant to permission PA/2025/3772 dated 29/01/2026 for ground floor rear extension 5.00 metres deep, maximum height of 3.00 metres, 3.00 metres high to the eaves

  Received 28 Sep, published by the council 30 Sep 2026 Amendments
• P/2026/2724 Awaiting decision

  719-727, London Road, Hounslow, TW3 1SE

  Variation of condition 2 (Approved Plans) to allow minor amendments to the approved drawings, including an increase in homes from 55 to 64, reduction in height from 10 storey to a maximum height of 6 storey, alterations to the site layout, altered internal layout plan layouts and inclusion of secondary fire escape stairs, and alternative elevational treatment following planning permission P/2023/3730 approved 31/10/2024 Variation of condition 2 (Approved Plans) to allow minor amendments to the approved drawings to include site layout, altered internal layout plan layouts and inclusion of secondary fire escape stairs, and alternative elevational treatment of planning permission P/2021/2614 approved under appeal APP/F5540/W/22/3298720 dated 21/11/2022 for Demolition of existing building and erection of a part three, part four, part five and part ten storey building to provide 55 dwellings with associated access, on-site servicing, car parking, landscaping and refuse and recycling storage... read more

  Received 28 Sep, published by the council 6 Oct 2026 Amendments
• P/2026/2542 Granted

  Former Units 9 and 10 Victory Business Centre, Fleming Way, Isleworth, TW7 6DB

  Non material amendment to amend the wording of Condition 30 (Cycle Parking) from not less than 66 long-stay and 4 short-stay bicycles to require not less than 46 long-stay and 2 short-stay bicycles of planning permission P/2023/1686 granted on 20/06/2024 for the redevelopment of Unit 9 and Unit 10 as a part four, part five-story residential block (Use Class C3) consisting of 33 flats with associated infrastructure and landscaping

  Received 7 Sep, published by the council 17 Sep 2026 Amendments
• P/2026/2124 Granted

  Former Chiswick Police Station, 205-211 Chiswick High Road, London, W4 2DU

  Non material amendment to optimise the internal layouts for both residents and staff, to improve the buildability of the development, and to ensure compliance with current statutory requirements, technical standards and regulatory obligations of 00248/205-211/P1 (P/2023/1632) approved 31/05/2024

  Received 21 Jul, published by the council 26 Jul 2026 Amendments
• P/2026/2442 Granted

  27 Cranford Lane, Hounslow, TW5 9EP

  Non-material amendment to change the paving materials approved through application P/2025/2148 on 02/09/2025 for the discharge of details relating to Condition 13 (hard and soft landscaping), submitted pursuant to planning permission P/2024/4105 dated 24/03/2025 for erection of four, two/three storey residential dwellings with associated private amenity space, parking, landscaping, cycle and refuse storage following demolition of the existing building.

  Received 26 Aug, published by the council 2 Sep 2026 Amendments