1 SYON PARK GARDENS, ISLEWORTH, TW7 5NE

1. 4 May 2021

   Received by Hounslow

2. 13 May 2021

   Validated

   Checked as complete and ready for consideration.

3. 2 Jul 2021

   Decision issued: GRANTED (FULL PLANNING PERMISSION NOT REQUIRED)

4. 27 Sep 2026

   Added to PlanIndex

Hounslow granted permission on 2 July 2021, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 88 Syon Lane, Isleworth, TW7 5NQ

  P/2025/3300 Submitted 3 Nov 2025 50 yards away

  Certificate of lawfulness for proposed rear roof extension with hip to gable conversion and two front roof windows, and erection of a detached single storey outbuilding

  Granted Lawful development Extension Loft or dormer +1 4 docs
  Small domestic

• 88 Syon Lane, Isleworth, TW7 5NQ

  PA/2025/3283 Submitted 30 Oct 2025 50 yards away

  Ground floor rear extension 6.00 metres deep, maximum height of 3.20 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 4 docs

• 82-84 SYON LANE, ISLEWORTH, TW7 5NQ

  P/2021/3519 Submitted 31 Aug 2021 50 yards away

  Certificate of Lawfulness for proposed erection of a hip to gable and rear roof extension with juliet balconies and three front roof windows with associated internal alterations following removal of existing side & rear roof extensions at both no.s 82 and 84.

  Granted Lawful development Extension Loft or dormer +1 5 docs

• 850-852 GREAT WEST ROAD, ISLEWORTH, TW7 5NG

  P/2021/2546 Submitted 22 Jun 2021 100 yards away

  Erection of part single storey rear extensions to Flats B at both properties .

  Refused Full applications New dwelling Extension 5 docs
  Small domestic

• 104 SYON LANE, ISLEWORTH, TW7 5NJ

  PA/2021/2710 Submitted 2 Jul 2021 100 yards away

  Ground floor rear extension 6 metres deep, maximum height of 2.80 metres, 2.80 metres high to the eaves

  Granted Prior approval Extension 9 docs

• 851-853 Great West Road, Isleworth, TW7 5PD

  P/2026/2034 Submitted 8 Jul 2026 100 yards away

  Erection of a single storey rear extension

  Granted Householder Extension 8 docs
  Small domestic

• P/2026/2813 Awaiting decision

  150 Wood Lane, Isleworth, TW7 5EQ

  (GSGS877009741) Certificate of lawfulness proposed for the erection of a single storey outbuilding to be used as a home gym / playroom / shed in the rear garden of the house

  Received 5 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2334 Granted

  69 Central Avenue, Hounslow, TW3 2QW

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

  Received 12 Aug, published by the council 16 Aug 2026 Lawful development
• P/2026/2459 Granted

  2 Letchworth Avenue, Feltham, TW14 9RY

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

  Received 28 Aug, published by the council 5 Sep 2026 Lawful development
• P/2026/2787 Awaiting decision

  13 Denbigh Road, Hounslow, TW3 4DU

  Certificate of Lawfulness for the proposed erection of a detached outbuilding in the rear garden.

  Received 1 Oct, published by the council 9 Oct 2026 Lawful development
• P/2026/2790 Awaiting decision

  14 Old Farm Close, Hounslow, TW4 7AB

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

  Received 1 Oct, published by the council 6 Oct 2026 Lawful development