41 NORTHUMBERLAND AVENUE, ISLEWORTH, TW7 5HZ

1. 29 Oct 2019

   Received by Hounslow

2. 29 Nov 2019

   Decision issued: APPROVED

3. 26 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 29 November 2019, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 62 ALBURY AVENUE, ISLEWORTH, TW7 5HX

  PA/2021/3503 Submitted 27 Aug 2021 50 yards away

  Ground floor rear extension 4 metres deep, maximum height of 3 metres, 2.90 metres high to the eaves

  Granted Prior approval Extension 4 docs

• 16 Downs View, Isleworth, TW7 5HF

  P/2025/3732 Submitted 16 Dec 2025 50 yards away

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

  Refused Householder Extension Loft or dormer +1 10 docs
  Domestic

• 16 Downs View, Isleworth, TW7 5HF

  P/2025/2942 Submitted 30 Sep 2025 50 yards away

  Erection of single storey side extension to the house.

  Granted Householder Extension 13 docs
  Small domestic

• 16 Downs View, Isleworth, TW7 5HF

  P/2025/2940 Submitted 30 Sep 2025 50 yards away

  Certificate of lawfulness proposed for a hip to gable conversion and erection of a rear roof extension with two front roof windows to the house.

  Granted Lawful development Extension Loft or dormer +1 10 docs

• 18 Downs View, Isleworth, TW7 5HF

  P/2024/3987 Submitted 25 Nov 2024 100 yards away

  Certificate of Lawfulness for the proposed erection of a hip-to-gable conversion and rear roof extension and installation of one front rooflight and one side window.

  Granted Lawful development Extension Loft or dormer +1 11 docs

• 33 Roxborough Avenue, Isleworth, TW7 5HQ

  P/2025/2966 Submitted 3 Oct 2025 100 yards away

  Erection of hip to gable conversion to main house, part two storey part first floor side extension, single storey rear extension, single storey front extension and porch to the house.

  Granted Householder Extension Loft or dormer 5 docs
  Small domestic

• P/2026/2304 Granted

  18 Clifden Road, Brentford, TW8 0PF

  Erection of a side and rear extensions.

  Received 7 Aug, published by the council 12 Aug 2026 Householder
• P/2026/2804 Awaiting decision

  128 Durham Road, Feltham, TW14 0AE

  Erection of a detached outbuilding in the rear garden following demolition of existing shed.

  Received 2 Oct, published by the council 9 Oct 2026 Householder
• P/2026/2301 Granted

  4 Glebe Street, Chiswick, W4 2BG

  Erection of a front side and rear side infill extensions with alterations to the rear elevation, a rear side first floor infill extension with replacement of windows to the rear elevation and installation of new rooflights to the existing ground floor infill extension of the house

  Received 7 Aug, published by the council 16 Aug 2026 Householder
• P/2026/1167 Granted

  20 Firs Drive, Hounslow, TW5 9TD

  Erection of part one, part two-storey side extension following demolition of existing garage and part one, part two-storey rear extension. Raising of roof ridge, erection of rear roof extensions, and installation of one front roof window.

  Received 15 Apr, published by the council 26 Jul 2026 Householder
• P/2026/2025 Granted

  1 Kneller Gardens, Isleworth, TW7 7NP

  Erection of a single storey rear and first floor side extension incorporating the conversion of the existing garage to a habitable room

  Received 8 Jul, published by the council 26 Jul 2026 Householder