134 Northumberland Crescent, Feltham, TW14 9SW

1. 15 Jan 2026

   Received by Hounslow

2. 21 Jan 2026

   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

• 134 Northumberland Crescent, Feltham, TW14 9SW

  P/2025/3388 Submitted 11 Nov 2025 0m away

  Retrospective application for the erection of a hip to gable and rear roof extension to the house

  Withdrawn Householder Extension Loft or dormer 11 docs
  Domestic

• 179 Northumberland Crescent, Feltham, TW14 9SR

  PA/2025/3470 Submitted 18 Nov 2025 35m away

  Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 2.75 metres high to the eaves

  Granted Prior approval Extension 8 docs

• 108 Northumberland Crescent, Feltham, TW14 9SW

  PA/2026/0817 Submitted 11 Mar 2026 88m away

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

  Granted Prior approval Extension 5 docs

• 6 Northumberland Crescent, Feltham, TW14 9SZ

  P/2026/0555 Submitted 16 Feb 2026 107m away

  91% historically approved · decision due ~17 Jun

  Details of conditions 7B ( Energy Strategy) 8(B) Materials submitted pursuant to planning permission P/2024/0980 dated 02/10/2024 for the erection of a two storey house with the formation of a vehicular access and a subdivided garden incorporating a single storey rear extension to the existing house following the demolition of the existing rear extension.

  Awaiting decision Conditions Extension Demolition 11 docs
  Small domestic

• 6 Northumberland Crescent, Feltham, TW14 9SZ

  P/2024/3531 Submitted 23 Oct 2024 107m away

  Details of Condition 8A (BRE) submitted pursuant to planning permission P/2024/0980 dated 02/10/2024 for Erection of a two storey house with the formation of a vehicular access and a subdivided garden incorporating a single storey rear extension to the existing house following the demolition of the existing rear extension

  Granted Conditions Extension Demolition 7 docs
  Small domestic

• 42 NORTHUMBERLAND CRESCENT, FELTHAM, TW14 9SZ

  PA/2021/2708 Submitted 2 Jul 2021 117m away

  Ground floor rear extension 6 metres deep, maximum height of 3 metres, 2.40 metres high to the eaves

  Granted Prior approval Extension 7 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