45 CORNWALL GROVE, CHISWICK, LONDON, W4 2LB

1. 15 Jun 2021

   Received by Hounslow

2. 16 Aug 2021

   Decision issued: APPROVED

3. 16 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.

Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.

More on householder applications in our guide

• 43 Balfern Grove, Chiswick, London, W4 2JX

  P/2026/0206 Submitted 22 Jan 2026 28m away

  Erection of a single storey side infill extension and two new front roof windows to the house.

  Granted Householder Extension Windows or glazing 10 docs
  Small domestic

• 39 Balfern Grove, Chiswick, London, W4 2JX

  P/2026/0083 Submitted 12 Jan 2026 31m away

  Certificate of lawfulness proposed erection of a rear roof and outrigger extension, including a Juliet balcony and three front roof windows to the house.

  Granted Lawful development Extension Windows or glazing 7 docs

• FLAT FIRST FLOOR 33 BALFERN GROVE, CHISWICK, W4 2JX

  P/2019/3915 Submitted 29 Oct 2019 41m away

  Certificate of Lawfulness for erection of a rear roof extension to outrigger of first floor flat

  Refused Lawful development Extension 8 docs

• 55 Eastbury Grove, Chiswick, W4 2JT.

  P/2026/2135 Submitted 22 Jul 2026 53m away

  100% historically approved · decision due ~16 Sep

  Certificate of lawfulness for the proposed conversion of flats back to a house and erection of a Juliet balcony and sliding doors to the rear of the property.

  Awaiting decision Lawful development New dwelling 9 docs

• Flat Ground Floor, 28 Cornwall Grove, Chiswick, London, W4 2LB

  P/2026/0554 Submitted 16 Feb 2026 54m away

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

  Granted Full applications Extension 10 docs
  Small domestic

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

  P/2026/1686 Submitted 8 Jun 2026 58m 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/2026/2047 Granted

  9 Borough Road, Isleworth, TW7 5DY

  Erection of a single storey rear extension.

  10 Jul 2026 Householder
• P/2026/1858 Granted

  8 CONNAUGHT AVENUE, HOUNSLOW, TW4 5BW

  Erection of single storey front extension to the outbuilding for used as storage, office and a Gym. Following part demolition of the outbuilding.

  23 Jun 2026 Householder
• P/2026/2503 Awaiting decision

  25 Arnold Crescent, Isleworth, TW7 7NS

  Erection of a single storey rear, two storey side extension, and rear roof extension with two front roof windows to the house.

  3 Sep 2026 Householder
• P/2026/1522 Granted

  4 Camborne Way, Hounslow, TW5 0PW

  Erection of a single storey rear extension and reduction in width of the existing side and rear extension.

  20 May 2026 Householder
• P/2026/2024 Granted

  20 Hartland Road, Isleworth, TW7 6RH

  Erection of a rear roof extension with windows to the front of the house.

  8 Jul 2026 Householder