P/2026/1561

1. 26 May 2026

   Received by Hounslow

2. 26 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.

This application is with Hounslow for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

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/2026/1314 Awaiting decision

  657 Great West Road, Isleworth, TW7 4PT

  Erection of a rear and side roof extension with one front roof window to the house. Erection of a single storey outbuilding to the rear garden.

  30 Apr 2026 53m away Householder
• P/2021/2277 Granted

  119 THORNBURY ROAD, ISLEWORTH, TW7 4ND

  Erection of single storey rear extension following the demolition of the existing, enlargement of the existing rear roof extension and replacement of the front roof light

  7 Jun 2021 71m away Householder
• P/2026/1843 Awaiting decision

  2 Thornbury Avenue, Isleworth, TW7 4NQ

  Enlargement of rear and side roof extensions to the house.

  22 Jun 2026 79m away Householder
• P/2021/2986 Granted

  2 CAROLINE CLOSE, ISLEWORTH, TW7 4QA

  Works to two trees in TPO no. 141: T1 Ash Tree (Inonotus hispidus):- Fell to ground level; T2 Poplar:- Fell to ground level

  22 Jul 2021 93m away Trees
• P/2026/2057 Awaiting decision

  107 Thornbury Road, Isleworth, TW7 4ND

  Works to tree in a TPO 279 dead silver birch Betula pendula fell to ground level at the rear of the garden.

  13 Jul 2026 118m away Trees
• 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.

  24 May 2021 165m 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