16 Somerset Waye, Hounslow, TW5 9HG

1. 1 Sep 2026

   Received by Hounslow

2. 2 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 27 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. 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

• 16 Somerset Waye, Hounslow, TW5 9HG

  P/2026/0126 Submitted 15 Jan 2026 0m away

  Erection of a rear roof extension and hip to gable conversion with two front roof windows to the house

  Refused Householder Extension Loft or dormer +1 6 docs
  Domestic

• 16 Somerset Waye, Hounslow, TW5 9HG

  P/2026/0127 Submitted 15 Jan 2026 0m away

  Erection of a part first floor rear extension to the house

  Granted Householder Extension 8 docs
  Domestic

• 16 Somerset Waye, Hounslow, TW5 9HG

  P/2026/1323 Submitted 30 Apr 2026 0m away

  Erection of a hip to gable and rear roof extension to the main part of the house with two front roof windows

  Refused Householder Extension Loft or dormer +1 6 docs
  Domestic

• 13 Somerset Waye, Hounslow, TW5 9HF

  PA/2025/2970 Submitted 3 Oct 2025 39m away

  Ground floor rear extension 6.00 metres deep, maximum height of 2.95 metres, 2.95 metres high to the eaves

  Granted Prior approval Extension 6 docs

• 21 Berkeley Waye, Hounslow, TW5 9HJ

  P/2025/3264 Submitted 29 Oct 2025 46m away

  Certificate of lawfulness for the existing single storey rear extension.

  Granted Lawful development Extension 5 docs
  Small domestic

• 21 Berkeley Waye, Hounslow, TW5 9HJ

  PA/2026/1812 Submitted 17 Jun 2026 46m away

  Ground floor rear extension 6.00 metres deep, maximum height 3.40 metres, 2.90 metres high to the eaves.

  Refused Prior approval Extension 5 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/2026/2476 Awaiting decision

  4 Upton Road, Hounslow, TW3 3HP

  (GS868132614) Certificate of lawfulness proposed for a single storey rear infill extension and a rear roof and outrigger extension with one front roof window to the house

  1 Sep 2026 Lawful development