1 Parkwood Road, Isleworth, TW7 5HE

1. 2 Mar 2026

   Received by Hounslow

2. 24 Apr 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

• 1 Parkwood Road, Isleworth, TW7 5HE

  P/2026/0769 Submitted 6 Mar 2026 0m away

  Erection of a single-storey rear and side extension.

  Granted Householder Extension 15 docs
  Small domestic

• 6 Harewood Road, Isleworth, TW7 5HB

  P/2026/0159 Submitted 19 Jan 2026 33m away

  Certificate of lawfulness for the proposed use of the house (Use Class C3(a)) to a single household living together and receiving care (Use Class C3(b))

  Granted Lawful development 7 docs

• 6 Harewood Road, Isleworth, TW7 5HB

  P/2025/2860 Submitted 23 Sep 2025 33m away

  Certificate of lawfulness for the proposed use of the house (Use Class C3(a)) as a Children's Care Home (Use Class C2).

  Granted Lawful development 8 docs

• 22 Parkwood Road, Isleworth, TW7 5HA

  P/2025/2749 Submitted 11 Sep 2025 36m away

  Erection of a single storey rear extension and existing garage partial conversion into habitable space.

  Granted Householder Extension 22 docs
  Small domestic

• 20 Parkwood Road, Isleworth, TW7 5HA

  P/2026/2445 Submitted 26 Aug 2026 42m away

  76% historically approved · decision due ~21 Oct

  Revised single storey rear infill extension, installation of drainage channel adjacent to the front boundary, and reduction in height of front gate and piers.

  Awaiting decision Householder Extension 9 docs
  Small domestic

• 20 Parkwood Road, Isleworth, TW7 5HA

  P/2025/3768 Submitted 19 Dec 2025 42m away

  Retrospective application for the erection of a single storey rear infill extension and the installation of a window to the front elevation.

  Refused Householder Extension Windows or glazing 7 docs
  Small domestic

• 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