18 Princes Avenue, Acton, London, W3 8LS

1. 9 Dec 2025

   Received by Hounslow

2. 2 Feb 2026

   Decision issued: GRANT

3. 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

• 16 Princes Avenue, Acton, London, W3 8LS

  P/2025/3347 Submitted 7 Nov 2025 10m away

  Works to tree within a conservation area. Magnolia (T1). Reduce height by approximately 2 metres and width by up to 3.5 metres.

  Granted Trees 4 docs

• 14 Princes Avenue, Acton, London, W3 8LS

  P/2026/0823 Submitted 11 Mar 2026 16m away

  Erection of a single-storey rear infill extension, erection of a rear roof extension, installation of one front roof window.

  Granted Householder Extension Windows or glazing 14 docs
  Small domestic

• 14 Princes Avenue,Acton,W3 8LS

  P/2026/2160 Submitted 23 Jul 2026 16m away

  Works to trees in a conservation area. T1. Apple (DBH 31 cm). Fell to ground level. T2. Apple (DBH 17.8 cm). Fell to ground level. T3. Japanese spindle (DBH 7.4 cm). Fell to ground level. T4. Japanese spindle (DBH 6.7 cm). Fell to ground level. T6. Fatsia japonica. Dead shrub. Fell to ground level. T7 Japanese spindle (DBH 6.9cm). Fell to ground level. T11. Apple (DBH 24.8cm). Crown reduce by up to 2 metres. Crown lift to 3 metres. Remove major deadwood.

  Granted Trees 5 docs

• 90 PARK DRIVE, ACTON, LONDON, W3 8NB

  P/2021/1781 Submitted 7 May 2021 51m away

  Erection of a basement with a rear light well and erection of a single storey rear extension.

  Granted Householder Extension 9 docs
  Small domestic

• 3 Princes Avenue, Acton, W3 8LZ

  P/2024/3511 Submitted 22 Oct 2024 57m away

  Fell tree in a Conservation Area 1 X T1 Leyland cypress - fell due to poor condition resulting from seiridium canker

  Granted Trees 6 docs

• 4 PRINCES AVENUE, ACTON, W3 8LS

  P/2019/4625 Submitted 9 Dec 2019 59m away

  Works to tee in a conservation area (5 day notice) - fell Prunus Cerasifera 'nigra'.

  Granted Trees 3 docs

• 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