23 Penwerris Avenue, Isleworth, TW7 4QT

1. 11 Nov 2025

   Received by Hounslow

2. 19 Jan 2026

   Decision issued: APPROVED

3. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 19 January 2026, 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.

• 29 Penwerris Avenue, Isleworth, TW7 4QT

  P/2026/1345 Submitted 5 May 2026 50 yards away

  Erection of a hip to gable to both sides and a rear roof extension with three front roof windows to the house

  Withdrawn Householder Extension Loft or dormer +1 6 docs
  Domestic

• 12 PENWERRIS AVENUE, ISLEWORTH, TW7 4QX

  P/2021/1613 Submitted 26 Apr 2021 50 yards away

  Retrospective planning application for the erection of a single storey side extension and increase in the height of the parapet on the boundaries

  Granted Householder Extension 7 docs
  Small domestic

• 11 PENWERRIS AVENUE, ISLEWORTH, TW7 4QT

  P/2021/2269 Submitted 7 Jun 2021 50 yards away

  Erection of single storey side and rear extension following the demolition of existing garage.

  Granted Householder Extension Demolition 17 docs
  Small domestic

• 18 Cranmore Avenue, Isleworth, TW7 4QW

  PA/2024/3490 Submitted 19 Oct 2024 100 yards away

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

  Granted Prior approval Extension 6 docs

• 18 Cranmore Avenue,Isleworth,W7 4QW

  P/2024/3651 Submitted 4 Nov 2024 100 yards away

  Erection of a single storey and part two storey rear extension, first floor side extension, hip to gable extension and erection of a rear roof extension with two front roof windows to the house. Erection of single storey detached out building in the rear garden.

  Refused Householder Extension Loft or dormer +1 17 docs
  Small domestic

• 28 Penwerris Avenue, Isleworth, TW7 4QX

  P/2025/2944 Submitted 30 Sep 2025 100 yards away

  Certificate of lawfulness for the proposed erection of a single storey detached outbuilding in the rear garden.

  Granted Lawful development 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