19 Linden Gardens, Chiswick, London, W4 2EQ

1. 24 Sep 2025

   Received by Hounslow

2. 10 Dec 2025

   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

• 37-39 DUKE ROAD, CHISWICK, LONDON, W4 2BA

  P/2019/3878 Submitted 25 Oct 2019 31m away

  Erection of a single storey rear extension to both houses

  Granted Householder Extension 9 docs
  Small domestic

• 59 Linden Gardens,Chiswick,W4 2EW

  P/2024/2883 Submitted 29 Aug 2024 34m away

  Certificate of lawfulness for the conversion of the property from two flats to a single residential dwelling.

  Granted Lawful development New dwelling 11 docs
  Several homes

• 38 and 40 Duke Road Chiswick London W4 2DD

  P/2026/0826 Submitted 11 Mar 2026 48m away

  Erection of side infill extensions at 38 and 40 Duke Road, and replacement of the rear extension at 38 Duke Road, including installation of rooflights

  Granted Householder Extension Loft or dormer 22 docs
  Domestic

• 28 DUKE ROAD, CHISWICK, LONDON, W4 2DD

  P/2021/2030 Submitted 24 May 2021 48m away

  Certificate of Lawfulness for the erection of a rear roof dormer extension and roof extension to the two storey rear outrigger, and two front roof windows to the house.

  Granted Lawful development Extension Loft or dormer +1 10 docs

• 28 DUKE ROAD, CHISWICK, LONDON, W4 2DD

  P/2021/2031 Submitted 24 May 2021 48m away

  Erection of a single storey rear infill extension to the house.

  Granted Householder Extension 11 docs
  Small domestic

• 53 Linden Gardens,Turnham Green,Chiswick,W4 2EH

  P/2025/2902 Submitted 26 Sep 2025 59m away

  Replacement of existing timber single glazed windows with new timber double glazed units to the front of the building and PVC-U double glazed units to the rear of Flat A, Flat B and Flat C.

  Granted Full applications Windows or glazing 15 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