210 Twickenham Road, Isleworth, TW7 7DR

This site has had 2 applications since 2025: 1 approved, 0 refused.

• P/2025/3575 Granted

  210 Twickenham Road, Isleworth, TW7 7DR

  Certificate of lawfulness for the existing use of the house as three flats

  Decided 17 Mar 2026 Lawful development

1. 7 Apr 2026

   Received by Hounslow

2. 26 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 2 June 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 lawful development applications in a median of 55 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 210 Twickenham Road, Isleworth, TW7 7DR

  P/2025/3575 Submitted 28 Nov 2025 0m away

  Certificate of lawfulness for the existing use of the house as three flats

  Granted Lawful development New dwelling 5 docs
  Several homes

• 2A Cleveland Road, Isleworth, TW7 7EY

  P/2026/0774 Submitted 6 Mar 2026 48m away

  Raising of roof ridge, erection of a rear roof extension with hip to gable conversion to both side of the roof and two front roof windows to the house.

  Granted Householder Extension Loft or dormer +1 9 docs
  Domestic

• 2A Cleveland Road, Isleworth, TW7 7EY

  P/2026/0753 Submitted 5 Mar 2026 48m away

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

  Granted Lawful development Extension 9 docs
  Small domestic

• 186 Twickenham Road, Isleworth, TW7 7DR

  P/2026/2163 Submitted 24 Jul 2026 110m away

  66% historically approved · decision due ~18 Sep

  Change of use of the existing house from Class C3 to a 5 bedroom House in Multiple Occupation (Class C4).

  Awaiting decision Full applications 9 docs

• 20 Chestnut Grove, Isleworth, TW7 7EZ

  P/2026/0319 Submitted 3 Feb 2026 127m away

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

  Granted Lawful development Extension Loft or dormer +1 9 docs

• 18 CHESTNUT GROVE, ISLEWORTH, TW7 7EZ

  PA/2023/0325 Submitted 1 Feb 2023 133m away

  Ground floor rear extension 6.00 metres deep, maximum height 4.00 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 5 docs

• P/2026/2118 Granted

  54 Amhurst Gardens, Isleworth, TW7 6AJ

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

  20 Jul 2026 Lawful development
• P/2026/2580 Awaiting decision

  50B Paxton Road, Chiswick, London, W4 2QX

  Certificate of lawfulness for the existing use of a first floor self contained flat.

  10 Sep 2026 Lawful development
• P/2026/2332 Granted

  43 Dawes Avenue, Isleworth, TW7 7JS

  Certificate of Lawfulness for the proposed hip to gable conversion, front roof lights and erection of a rear roof extension to the house.

  12 Aug 2026 Lawful development
• P/2026/2089 Granted

  18 Central Avenue, Hounslow, TW3 2QH

  Certificate of lawfulness for the existing use of the rear extension as a self contained flat.

  17 Jul 2026 Lawful development
• P/2026/2566 Awaiting decision

  109 Wood Lane, Isleworth, TW7 5EG

  Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion with roof windows to the front and Juliet balcony to the rear of the house.

  9 Sep 2026 Lawful development