144 Ash Grove, Hounslow, TW5 9DS

1. 7 May 2026

   Received by Hounslow

2. 5 Jun 2026

   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

• 75 ASH GROVE, HOUNSLOW, TW5 9DU

  P/2023/0197 Submitted 20 Jan 2023 43m away

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

  Granted Lawful development 6 docs

• 158 Ash Grove, Hounslow, TW5 9DS

  P/2026/1145 Submitted 14 Apr 2026 50m away

  Non-Material Amendment to solar panel positioning and energy statement pursuant to permission 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 Amendments Extension Demolition 4 docs

• 158 Ash Grove, Hounslow, TW5 9DS

  P/2024/3693 Submitted 6 Nov 2024 50m away

  Details of Condition 3 (Materials) submitted pursuant to 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 58m 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

• 154-158 Ash Grove Hounslow TW5 9DS

  P/2024/3202 Submitted 24 Sep 2024 62m 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

• 158A Ash Grove, Hounslow, TW5 9DS

  P/2025/2521 Submitted 15 Aug 2025 66m away

  Erection of a rear roof extension and two front rooflights to the house.

  Granted Householder Extension Loft or dormer 9 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