42 Elmwood Road, Chiswick, London, W4 3DZ

1. 12 Aug 2026

   Received by Hounslow

2. 16 Aug 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 7 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, against a statutory target of eight weeks. Over the last year Hounslow decided lawful development applications in a median of 55 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 55 Sutton Lane South, Chiswick, London, W4 3JR

  P/2026/0082 Submitted 12 Jan 2026 75m away

  Alterations to the existing single storey rear and side extension to allow the conversion of the existing residential house to three self contained flats with associated private amenity space, cycle and refuse storage

  Granted Full applications New dwelling Extension 27 docs
  Small domestic

• 19 Cedars Road, Chiswick, London, W4 3JP

  P/2026/1482 Submitted 18 May 2026 81m away

  100% historically approved · decision due ~7 Aug

  Certificate of lawfulness for the existing use of a House in Multiple Occupation.

  Awaiting decision Lawful development 2 docs

• 19 Cedars Road, Chiswick, W4 3JP

  P/2024/2649 Submitted 1 Aug 2024 81m away

  Change of use from a single family house (Class C3) to a House in Multiple Occupation (Class C4) for occupation by up to six persons.

  Refused Full applications 8 docs

• 15 Elmwood Road, Chiswick, London, W4 3DY

  P/2026/0207 Submitted 22 Jan 2026 97m away

  Erection of a single storey rear extension with flat roof, rear decking, access steps and balustrade to the house.

  Granted Householder Extension 6 docs
  Small domestic

• 7 Hazledene Road, Chiswick, London, W4 3JB

  P/2026/2268 Submitted 4 Aug 2026 107m away

  76% historically approved · decision due ~29 Sep

  Erection of a single storey rear and side wrap around extension.

  Awaiting decision Householder Extension 5 docs
  Small domestic

• 7 Hazledene Road, Chiswick, London, W4 3JB

  P/2026/1775 Submitted 15 Jun 2026 107m away

  Erection of a single-storey rear and side wrap-around extension.

  Withdrawn Householder Extension 4 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