20 Parkwood Road, Isleworth, TW7 5HA

This site has had 4 applications since 2024: 2 approved, 1 refused.

• P/2025/3768 Refused

  20 Parkwood Road, Isleworth, TW7 5HA

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

  Decided 13 Feb 2026 Householder
• PA/2024/4141 Granted

  20 Parkwood Road, Isleworth, TW7 5HA

  Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 3.00 metres high to the eaves

  Decided 9 Jan 2025 Prior approval
• P/2024/4142 Granted

  20 Parkwood Road, Isleworth, TW7 5HA

  Certificate of Lawfulness for the proposed front porch extension and erection of rear garden outbuilding.

  Decided 23 Jan 2025 Lawful development

1. 26 Aug 2026

   Received by Hounslow

2. 2 Sep 2026

   Added to PlanIndex

3. 10 Sep 2026

   Status changed to REGISTERED: Under Consultation

   Previously REGISTERED: Valid.

4. 23 Sep 2026

   Status changed to REGISTERED: Under Assessment

   Previously REGISTERED: Under Consultation.

5. Decision

   Awaiting decision

   Decision expected by 21 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Hounslow took a median of 56 days over the applications it decided in the last year.

This application is with Hounslow for determination, against a statutory target of eight weeks. Over the last year Hounslow decided householder applications in a median of 63 days. More in our guide to how long planning decisions take.

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.

• 20 Parkwood Road, Isleworth, TW7 5HA

  PA/2024/4141 Submitted 9 Dec 2024 50 yards away

  Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 5 docs

• 20 Parkwood Road, Isleworth, TW7 5HA

  P/2024/4142 Submitted 7 Dec 2024 50 yards away

  Certificate of Lawfulness for the proposed front porch extension and erection of rear garden outbuilding.

  Granted Lawful development Extension 5 docs
  Small domestic

• 20 Parkwood Road, Isleworth, TW7 5HA

  P/2025/3768 Submitted 19 Dec 2025 50 yards 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

• 22 Parkwood Road, Isleworth, TW7 5HA

  P/2025/2749 Submitted 11 Sep 2025 50 yards away

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

  Granted Householder Extension 22 docs
  Small domestic

• 1 Parkwood Road, Isleworth, TW7 5HE

  P/2026/0769 Submitted 6 Mar 2026 50 yards away

  Erection of a single-storey rear and side extension.

  Granted Householder Extension 15 docs
  Small domestic

• 1 Parkwood Road, Isleworth, TW7 5HE

  P/2026/0699 Submitted 2 Mar 2026 50 yards away

  Certificate of lawfulness for the proposed erection of a rear roof extension with front roof windows to the house.

  Granted Lawful development Extension Windows or glazing 10 docs

• 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