10 Haslemere Avenue, Hounslow, TW5 9UT

1. 26 Aug 2026

   Received by Hounslow

2. 2 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 21 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Hounslow took a median of 55 days over the applications it decided in the last year.

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

• 13 Cedar Road, Hounslow, TW4 7QL

  PA/2025/2702 Submitted 5 Sep 2025 93m away

  Ground floor rear extension 6.00 metres deep, maximum height of 2.80 metres, 2.80 metres high to the eaves following demolition of existing out-building to the rear of the existing house

  Granted Prior approval Extension Demolition 7 docs

• 13 Cedar Road, Hounslow, TW4 7QL

  P/2025/2738 Submitted 10 Sep 2025 93m away

  Certificate of lawfulness for the proposed erection of a rear roof extension with front roof windows and a detached single storey outbuilding

  Granted Lawful development Extension Windows or glazing 7 docs
  Small domestic

• 113 To 129 Travellers Way, Hounslow, TW4 7QB

  P/2026/2443 Submitted 26 Aug 2026 103m away

  5-day notice to fell dead, fallen and unstable Birch T12 within TPO 104

  Granted Trees 2 docs

• 15 HASLEMERE AVENUE, HOUNSLOW, TW5 9UT

  PA/2019/4052 Submitted 8 Nov 2019 112m away

  Ground floor rear extension 6 metres deep, maximum height of 3 metres, 2.85 metres high to the eaves

  Withdrawn Prior approval Extension 2 docs

• 486 Bath Road, Hounslow, TW5 9UP

  P/2024/3649 Submitted 4 Nov 2024 122m away

  Non-material amendment to amend the wording of Condition 2, to delay the payment of the CIL until commencement of the main construction following approval 00083/486/P15 (P/2019/3416) dated 24/06/2021 for Demolition of the existing buildings and redevelopment of the site to provide 21 residential units (C3) within a part three, part four and part setback six storey, building with associated amenity space, landscaping, basement car parking and all associated works.

  Granted Amendments Demolition 3 docs

• 46 Haslemere Avenue, Hounslow, TW5 9UT

  P/2026/1028 Submitted 30 Mar 2026 124m away

  Demolition of the existing outbuilding and erection of a part single and part two-storey two bedroomed detached house with associated treatment works, amenity space, and associated landscaping.

  Refused Full applications New dwelling Demolition 19 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