Flat 2, 89 Princes Avenue, Acton, London, W3 8LY

1. 29 Sep 2025

   Received by Hounslow

2. 13 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 8 Jan 2026

   Decision issued: GRANT

4. 12 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

• Flat 3, 89 Princes Avenue, Acton, London, W3 8LY

  P/2025/2912 Submitted 29 Sep 2025 0m away

  Certificate of lawfulness for the existing use of a self contained studio flat at Flat 3, 89 Princes Avenue, W3 8LY.

  Granted Lawful development 5 docs

• Flat 4, 89 Princes Avenue, Acton, London, W3 8LY

  P/2025/2913 Submitted 29 Sep 2025 0m away

  Certificate of lawfulness for the existing use of a self contained studio flat at Flat 4, 89 Princes Avenue, W3 8LY.

  Granted Lawful development 5 docs

• Flat 5, 89 Princes Avenue, Acton, London, W3 8LY

  P/2025/2914 Submitted 29 Sep 2025 0m away

  Certificate of lawfulness for the existing use of a self contained studio flat at Flat 5, 89 Princes Avenue, W3 8LY.

  Granted Lawful development 5 docs

• Flat 1, 89 Princes Avenue, Acton, London, W3 8LY

  P/2025/2910 Submitted 29 Sep 2025 0m away

  Certificate of lawfulness for the existing use of a self contained studio flat at Flat 1, 89 Princes Avenue, W3 8LY.

  Granted Lawful development 5 docs

• Flat 6, 89 Princes Avenue, Acton, London, W3 8LY

  P/2025/2915 Submitted 29 Sep 2025 0m away

  Certificate of lawfulness for the existing use of the detached outbuilding in the rear garden as a self-contained studio residential unit.

  Granted Lawful development 5 docs

• 156 PRINCES AVENUE, ACTON, W3 8LU

  P/2023/0333 Submitted 2 Feb 2023 36m away

  Replacement of existing rear and side timber windows and doors to upvc and timber composite doors.

  Refused Householder Windows or glazing 12 docs
  Domestic

• P/2026/2033 Granted

  3 Benedict Drive, Feltham, TW14 8JH

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

  8 Jul 2026 Lawful development
• P/2026/2027 Granted

  115 Northumberland Crescent, Feltham, TW14 9SP

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

  8 Jul 2026 Lawful development
• P/2026/2009 Granted

  3 Brainton Avenue, Feltham, TW14 0AZ

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

  7 Jul 2026 Lawful development
• P/2026/2014 Granted

  82 Sussex Avenue, Isleworth, TW7 6LB

  Certificate of lawfulness for the proposed erection of a rear roof extension, a porch to the front of the house, and a front roof window.

  7 Jul 2026 Lawful development
• P/2026/2473 Awaiting decision

  16 Somerset Waye, Hounslow, TW5 9HG

  Certificate of lawfulness for the proposed erection of a rear roof extension with two roof windows to the front and alterations to the existing side roof from flat roof to pitched roof.

  1 Sep 2026 Lawful development