5 Cornwall Grove, Chiswick, London, W4 2LB

1. 13 Feb 2026

   Received by Hounslow

2. 17 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 29 Apr 2026

   Decision issued: APPROVED

4. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 29 April 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.

• 17 Cornwall Grove, Chiswick, London, W4 2LB

  P/2026/0026 Submitted 7 Jan 2026 50 yards away

  Erection of a single storey rear and infill extension following the demolition of the existing rear and infill extension to the house

  Granted Householder Extension Demolition 10 docs
  Small domestic

• 2 CORNWALL GROVE, CHISWICK, LONDON, W4 2LB

  P/2021/2403 Submitted 14 Jun 2021 50 yards away

  Certificate of Lawfulness for the proposed erection of a single storey rear extension to the house

  Granted Lawful development Extension 6 docs
  Small domestic

• 25 BALFERN GROVE, CHISWICK, W4 2JX

  P/2023/1024 Submitted 30 Mar 2023 50 yards away

  Certificate of Lawfulness for the proposed development of a rear roof dormer extension and installation of two front roof lights to the house.

  Granted Lawful development Extension Loft or dormer 7 docs

• 25 BALFERN GROVE, CHISWICK, W4 2JX

  PA/2023/1063 Submitted 3 Apr 2023 50 yards away

  Ground floor rear extension 5.6 metres deep, maximum height of 3.05 metres, 3.00 metres high to the eaves.

  Granted Prior approval Extension 5 docs

• 84A CHISWICK LANE, CHISWICK, W4 2LA

  P/2021/1297 Submitted 6 Apr 2021 50 yards away

  Erection of a part single side and rear extension following demolition of existing rear extension to the flat

  Granted Full applications Extension Demolition 10 docs

• 26 Cornwall Grove, Chiswick, London, W4 2LB

  P/2026/1686 Submitted 8 Jun 2026 50 yards away

  Erection of a single storey part side and rear extension to the ground floor flat.

  Granted Full applications Extension 16 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