P/2026/1350

1. 5 May 2026

   Received by Hounslow

2. 30 Jun 2026

   Decision issued: LAWFNOTGRANT

3. 26 Jul 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

• P/2026/0771 Withdrawn

  30 Northcote Avenue, Isleworth, TW7 7JQ

  Certificate of lawfulness for the proposed erection of a single storey outbuilding to the rear of the house.

  6 Mar 2026 22m away Lawful development
• P/2026/2046 Awaiting decision

  59 Crane Avenue, Isleworth, TW7 7JR

  Non material amendment to remove the unimplemented rear roof extension with front roof window and the window on the front elevation of planning permission 00313/59/P1 approved 10/11/2021 for the erection of a single storey rear extension and a rear roof extension with one front roof window and insertion of a window on the front elevation

  10 Jul 2026 46m away Amendments
• P/2023/0324 Refused

  40 WOODSTOCK AVENUE, ISLEWORTH, TW7 7JE

  Erection of a single storey rear extension with part first floor rear extension and rear roof extension to the house.

  1 Feb 2023 93m away Householder
• 06/1141/PS192 Granted

  31 Northcote Road Twickenham Richmond Upon Thames TW1 1PB

  Proposed Loft Conversion With Rear Dormer.

  11 Apr 2006 130m away Prior approval
• PA26/0983 Awaiting decision

  145, Haliburton Road, Twickenham, TW1 1PE

  Erection of rear extension to create a sun room.

  20 Mar 2026 140m away Householder
• 06/0700/HOT Granted

  62A Northcote Road Twickenham Richmond Upon Thames TW1 1PA

  Demolition Of Existing Conservatory And Erection Of A New Single Storey Rear Extension; New Front Bay Window And Skylight Set In Front Facade Of Roof.

  9 Mar 2006 163m away Householder

• P/2026/2219 Awaiting decision

  Great West House,993 Great West Road,Brentford,TW8 9DF

  Certificate of lawfulness for the installation of two electricity substations.

  29 Jul 2026 Lawful development
• P/2026/1626 Granted

  2 Oak Avenue, Hounslow, TW5 9EB

  Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and the addition of one front roof light.

  2 Jun 2026 Lawful development
• P/2026/2168 Awaiting decision

  49 Durham Road, Feltham, TW14 0AG

  Certificate of lawfulness for the proposed erection of a detached outbuilding in the rear garden.

  24 Jul 2026 Lawful development
• P/2026/1448 Granted

  13 Orchard Avenue, Hounslow, TW5 0DU

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

  13 May 2026 Lawful development
• P/2026/1682 Granted

  133 Swan Road, Feltham, TW13 6LT

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

  5 Jun 2026 Lawful development