1, St Valery Place Norman Crescent, Hounslow, TW5 9BU

1. 23 Jul 2026

   Received by Hounslow

2. 13 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 26 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 8 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

• 154-158 Ash Grove Hounslow TW5 9DS

  P/2024/3202 Submitted 24 Sep 2024 65m away

  Details of condition 22 (Construction Logistics Plan) submitted pursuant planning permission 00048/154-158/P1 (P/2023/0440) dated 14/07/2023 for erection of two pairs of semi-detached houses and a pair of semi-detached bungalows following demolition of the two storey side extension and outbuilding to 158 Ash Grove and demolition of garage to 156 Ash Grove, with associated amenity, car parking and cycle and bin stores.

  Granted Conditions Extension Demolition 5 docs

• 67 Ash Grove, Hounslow, TW5 9DU

  PA/2025/2906 Submitted 26 Sep 2025 101m away

  Ground floor rear extension 5.00 metres deep, maximum height of 3.00 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 6 docs

• 144 Ash Grove, Hounslow, TW5 9DS

  P/2026/1377 Submitted 7 May 2026 119m away

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

  Granted Lawful development Extension Windows or glazing 6 docs

• 75 ASH GROVE, HOUNSLOW, TW5 9DU

  P/2023/0197 Submitted 20 Jan 2023 120m away

  Certificate of lawfulness for the erection of a detached rear outbuilding to the house

  Granted Lawful development 6 docs

• 137 Ash Grove, Hounslow, TW5 9DX

  P/2025/2678 Submitted 3 Sep 2025 129m away

  Certificate of lawfulness for the existing use of a House in Multiple Occupation (C4)

  Granted Lawful development 6 docs

• 137 Ash Grove, Hounslow, TW5 9DX

  P/2024/2699 Submitted 8 Aug 2024 129m away

  Certificate of lawfulness for the existing change of use from a residential dwelling (C3) to house of multiple occupation (C4)

  Granted Lawful development 7 docs
  Domestic

• 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