23 Downs View, Isleworth, TW7 5HF

1. 22 Oct 2024

   Received by Hounslow

2. 5 Dec 2024

   Decision issued: GRANT

3. 23 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

• 23 Downs View, Isleworth, TW7 5HF

  P/2025/2500 Submitted 12 Aug 2025 0m away

  Erection of a single storey ground floor side extension and part rear infill extension to the house. Following the demolition of the garage.

  Withdrawn Householder Extension Demolition 6 docs
  Small domestic

• 23 Downs View, Isleworth, TW7 5HF

  P/2025/3379 Submitted 11 Nov 2025 0m away

  Erection of a two storey side extension to the house.

  Granted Householder Extension 8 docs
  Domestic

• 3 Downs View, Isleworth, TW7 5HF

  P/2024/3116 Submitted 17 Sep 2024 27m away

  Erection of a single storey rear wrap-around extension and conversion of the existing garage into a habitable space.

  Granted Householder Extension 26 docs
  Small domestic

• 27 Parkwood Road, Isleworth, TW7 5HE

  P/2026/1697 Submitted 8 Jun 2026 42m away

  Erection of a single storey rear and a single storey side extension

  Withdrawn Householder Extension 4 docs
  Small domestic

• 27 Parkwood Road, Isleworth, TW7 5HE

  P/2026/1891 Submitted 25 Jun 2026 42m away

  Certificate of lawfulness for the proposed erection of a rear roof extension with a hip to gable conversion, two front roof lights and a detached outbuilding at the rear garden.

  Granted Lawful development Extension Loft or dormer 7 docs

• 27 Parkwood Road, Isleworth, TW7 5HE

  PA/2026/1423 Submitted 11 May 2026 42m away

  Ground floor rear extension 4.50 metres deep, maximum height 3.60 metres, 2.60 metres high to the eaves.

  Granted Prior approval Extension 4 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