2 Harlequin Avenue, Brentford, TW8 9EW

1. 21 Apr 2026

   Received by Hounslow

2. 30 Apr 2026

   Validated

   Checked as complete and ready for consideration.

3. 26 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 25 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.

• 1 NEW HORIZONS COURT 1-4 RYAN DRIVE, BRENTFORD, TW8 9EP

  P/2019/3794 Submitted 21 Oct 2019 50 yards away

  Details of condition 11a (Energy Strategy) and condition 12a (BREEAM Design Stage Certificate) submitted pursuant of planning permission 02912/A1/P1 dated 14/12/2018 for alterations to the existing building to provide 6 residential apartments with associated parking

  Granted Conditions New dwelling 7 docs

• 4 NEW HORIZONS COURT 1-4 RYAN DRIVE, BRENTFORD, TW8 9EP

  P/2019/3798 Submitted 21 Oct 2019 50 yards away

  Details submitted pursuant to Condtion 11a (Energy Strategy) and 12a (BREEAM Design Stage Certificate) for planning permission 02912/A4/P3 dated 14/12/2018 for conversion of third floor to create six self contained flats

  Decided Conditions New dwelling 5 docs

• 4 NEW HORIZONS COURT 1-4 RYAN DRIVE, BRENTFORD, TW8 9EP

  P/2019/3797 Submitted 21 Oct 2019 50 yards away

  Details submitted pursuant to Condition 11a (Energy Strategy) and 12a (BREEAM Design Stage Certificate) for planning permission 02912/A4/P2 dated 14/12/2018 for conversion of third floor to create six self contained flats

  Granted Conditions New dwelling 7 docs

• 3 NEW HORIZONS COURT 1-4 RYAN DRIVE, BRENTFORD, TW8 9EP

  P/2019/3796 Submitted 21 Oct 2019 50 yards away

  Details submitted pursuant to Condition 11a (Energy Strategy) and 12a (BREEAM Design Stage Certificate) for planning permission 02912/A3/P2 dated 14/12/2018 for conversion of third floor to create seven self contained flats

  Granted Conditions New dwelling 7 docs

• 2 NEW HORIZONS COURT 1-4 RYAN DRIVE, BRENTFORD, TW8 9EP

  P/2019/3795 Submitted 21 Oct 2019 50 yards away

  Details submitted pursuant to Condition 11a (Energy Strategy) and 12a (BREEAM Design Stage Certificate) for planning permission 02912/A2/P2 dated 14/12/2018 for conversion of third floor to create eight self-contained flats

  Granted Conditions New dwelling 7 docs

• BUILDING 1 1-4 NEW HORIZONS COURT RYAN DRIVE, BRENTFORD, TW8 9EP

  P/2021/2679 Submitted 30 Jun 2021 50 yards away

  Details of Condition 13 (BREEAM Water Use Calculation) submitted pursuant to planning permission 02912/A1/P1 dated 14/12/2018 for the conversion of third floor to create 6 self-contained flats.

  Granted Conditions New dwelling 12 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.

  Received 20 Jul, published by the council 26 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.

  Received 10 Sep, published by the council 17 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.

  Received 12 Aug, published by the council 16 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.

  Received 17 Jul, published by the council 26 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.

  Received 9 Sep, published by the council 17 Sep 2026 Lawful development