563C Chiswick High Road, Chiswick, London, W4 3AY

1. 31 Jul 2026

   Received by Hounslow

2. 5 Aug 2026

   Added to PlanIndex

3. 12 Aug 2026

   Status changed to REGISTERED: Under Consultation

   Previously REGISTERED: Valid.

4. 2 Sep 2026

   Status changed to REGISTERED: Under Assessment

   Previously REGISTERED: Under Consultation.

5. Decision

   Awaiting decision

   Decision expected by 25 September 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. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.

The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.

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

• 563A Chiswick High Road, Chiswick, London, W4 3AY

  P/2025/3630 Submitted 5 Dec 2025 0m away

  Certificate of lawfulness existing for the continued use as a flat

  Granted Lawful development 5 docs

• 563B Chiswick High Road, Chiswick, London, W4 3AY

  P/2026/0709 Submitted 2 Mar 2026 0m away

  Certificate of lawfulness existing for the continued use as a self contained flat

  Granted Lawful development 6 docs

• 559 Chiswick High Road, Chiswick, London, W4 3AY

  P/2026/0165 Submitted 19 Jan 2026 10m away

  Certificate of lawfulness for the proposed use of the premises as a booking office for private hire vehicles

  Granted Lawful development 6 docs

• 559 Chiswick High Road, Chiswick, London, W4 3AY

  P/2026/1562 Submitted 26 May 2026 10m away

  Change of use from a commercial premises (Class E) to a private hire administrative office (Sui Generis) operating on a pre-booked telephone and app-based basis only.

  Granted Full applications 11 docs

• 549A Chiswick High Road, Chiswick, London, W4 3AY

  P/2025/2553 Submitted 19 Aug 2025 38m away

  Works to trees in conservation area

  Withdrawn Trees 3 docs

• 136 Wellesley Road, Chiswick, London, W4 3AP

  P/2024/2316 Submitted 10 Jul 2024 57m away

  Erection of a rear and side wrap around roof extensions to the house.

  Refused Householder Extension 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