197 Spring Grove Road, Isleworth, TW7 4AL

1. 11 Sep 2025

   Received by Hounslow

2. 31 Oct 2025

   Decision issued: LAWFNOTGRANT

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

• 197 Spring Grove Road, Isleworth, TW7 4AL

  P/2026/0572 Submitted 18 Feb 2026 0m away

  Erection of a single storey rear and part first floor side extension incorporating alterations to the front porch

  Granted Householder Extension 14 docs
  Small domestic

• 197 Spring Grove Road, Isleworth, TW7 4AL

  P/2026/1363 Submitted 6 May 2026 0m away

  Non Material Amendment to allow design changes to the overhang, roof lights and rear glazing to the single storey rear extension following permission P/2025/1189 dated 15/07/2025 for Erection of a single storey rear extension with a dummy-pitched roof to the front elevation of the existing side extension to the house.

  Granted Amendments Extension Loft or dormer +1 7 docs
  Small domestic

• 191 Spring Grove Road, Isleworth, TW7 4AL

  P/2026/1770 Submitted 15 Jun 2026 37m away

  Erection of single storey detached outbuilding for use as a games room, home gym, sauna and toilet in the rear garden.

  Refused Householder 6 docs
  Small domestic

• 3 Witham Road, Isleworth, TW7 4AJ

  P/2026/0779 Submitted 9 Mar 2026 81m away

  Erection of a single storey rear and side extension to the house.

  Granted Full applications Extension 7 docs
  Small domestic

• 3 Witham Road, Isleworth, TW7 4AJ

  P/2025/3713 Submitted 15 Dec 2025 81m away

  Erection of a single storey side and rear extension to the house.

  Withdrawn Householder Extension 4 docs
  Small domestic

• 4 Eversley Crescent, Isleworth, TW7 4LS

  P/2026/1495 Submitted 18 May 2026 92m away

  Erection of a single-storey rear infill conservatory extension.

  Granted Householder Extension 11 docs
  Small 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