41 College Road, Isleworth, TW7 5DL

1. 4 Nov 2025

   Received by Hounslow

2. 24 Dec 2025

   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

• 45 College Road, Isleworth, TW7 5DL

  P/2026/0019 Submitted 6 Jan 2026 15m away

  Erection of a single storey rear extension to the house, with the existing detached garage incorporated and converted to form a bedroom, replacement of garage door with a window.

  Granted Householder Extension Windows or glazing 13 docs
  Small domestic

• 28 COLLEGE ROAD, ISLEWORTH, TW7 5DW

  P/2021/1962 Submitted 18 May 2021 33m away

  Erection of a single storey rear extension and a side roof dormer with a front and sde roof window to the house

  Refused Householder Extension Loft or dormer +1 20 docs
  Small domestic

• 42 College Road, Isleworth, TW7 5DW

  P/2026/2456 Submitted 27 Aug 2026 60m away

  100% historically approved · decision due ~22 Oct

  Certificate of lawfulness for the proposed erection of a single storey rear extension.

  Awaiting decision Lawful development Extension 8 docs
  Small domestic

• 42 College Road, Isleworth, TW7 5DW

  P/2026/0773 Submitted 6 Mar 2026 60m away

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

  Granted Householder Extension 12 docs
  Small domestic

• 42 COLLEGE ROAD, ISLEWORTH, TW7 5DW

  P/2021/2330 Submitted 9 Jun 2021 60m away

  Erection of a rear roof extension with juliet balcony and two front roof windows.

  Granted Householder Extension Windows or glazing 10 docs
  Domestic

• 3 RIDGEWAY ROAD, ISLEWORTH, TW7 5LB

  P/2019/4055 Submitted 8 Nov 2019 62m away

  Works to a tree within a conservation area T1 - Silver Birch - Prune by 40%

  Granted Trees 4 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