2 Letchworth Avenue, Feltham, TW14 9RY

1. 28 Aug 2026

   Received by Hounslow

2. 5 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 23 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

• 2 Letchworth Avenue, Feltham, TW14 9RY

  P/2026/0911 Submitted 19 Mar 2026 0m away

  Certificate of lawfulness for the proposed use of a room in the house for a private hire operator business

  Granted Lawful development 6 docs

• 2 Letchworth Avenue, Feltham, TW14 9RY

  PA/2026/2393 Submitted 18 Aug 2026 0m away

  91% historically approved · decision due ~13 Oct

  Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 2.85 metres high to the eaves

  Awaiting decision Prior approval Extension 9 docs

• 4 Letchworth Avenue, Feltham, TW14 9RY

  P/2024/3425 Submitted 12 Oct 2024 6m away

  Certificate of Lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and front roof windows and a front porch extension.

  Granted Lawful development Extension Loft or dormer +1 6 docs
  Small domestic

• 4 Letchworth Avenue, Feltham, TW14 9RY

  PA/2024/3424 Submitted 14 Oct 2024 6m away

  Ground floor rear extension 6.00 metres deep, maximum height of 2.91 metres, 2.91 metres high to the eaves

  Granted Prior approval Extension 7 docs

• 328 BEDFONT LANE, FELTHAM, TW14 9NU

  P/2021/2053 Submitted 24 May 2021 38m away

  Erection of a two storey side, single storey rear, part first floor rear extension and front porch to the house

  Refused Householder Extension 9 docs
  Small domestic

• 328 Bedfont Lane, Feltham, TW14 9NU

  P/2026/2413 Submitted 24 Aug 2026 38m away

  76% historically approved · decision due ~21 Oct

  Erection of a rear roof extension with hip to gable conversion and front rooflight.

  Awaiting decision Householder Extension Loft or dormer 12 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