55 Syon Park Gardens, Isleworth, TW7 5NE

1. 20 Sep 2024

   Received by Hounslow

2. 22 Oct 2024

   Decision issued: GRANT

3. 23 Sep 2026

   Added to PlanIndex

Hounslow granted permission on 22 October 2024, 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.

• 112A Syon Lane, Isleworth, TW7 5NJ

  P/2024/3650 Submitted 4 Nov 2024 100 yards away

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

  Granted Lawful development Extension Loft or dormer +1 19 docs

• 108 Syon Lane, Isleworth, TW7 5NJ

  PA/2026/2043 Submitted 10 Jul 2026 100 yards away

  Ground floor rear extension 6.00 metres deep, maximum height 3.40 metres, 2.90 metres high to the eaves.

  Granted Prior approval Extension 6 docs

• Wyke Green Estate, Isleworth TW7 5PG

  P/2025/3824 Submitted 2 Jan 2026 100 yards away

  Works to trees within TPO 64. T15 Holly. Fell to ground level T28 and T29 Yew. Prune back overhang into property by up to 2 metres T142 Rowan. Fell to ground level. T3 Blue Atlas Cedar. Prune overhang into property back to previous pruning points and by up to 1 metre.

  Granted Trees 4 docs

• 56 SYON PARK GARDENS, ISLEWORTH, TW7 5ND

  PA/2021/2819 Submitted 9 Jul 2021 100 yards away

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

  Refused Prior approval Extension 4 docs

• 104 SYON LANE, ISLEWORTH, TW7 5NJ

  PA/2021/2710 Submitted 2 Jul 2021 150 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

• 794 GREAT WEST ROAD, ISLEWORTH, TW7 5NA

  PA/2023/0415 Submitted 9 Feb 2023 150 yards away

  Ground floor rear extension 6.00 metres deep, maximum height of 3.30 metres, 3.00 metres high to the eaves

  Granted Prior approval Extension 7 docs

• P/2026/2675 Awaiting decision

  17 Saxon Avenue, Feltham, TW13 5JJ

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

  Received 21 Sep, published by the council 23 Sep 2026 Lawful development
• P/2026/2668 Awaiting decision

  45 Shelley Crescent, Hounslow, TW5 9BQ

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

  Received 21 Sep, published by the council 23 Sep 2026 Lawful development
• P/2026/2651 Awaiting decision

  3 Clayponds Avenue, Brentford, TW8 9QQ

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

  Received 17 Sep, published by the council 20 Sep 2026 Lawful development
• P/2026/2627 Awaiting decision

  23 Elmgate Avenue, Feltham, TW13 7BU

  Certificate of lawfulness for the proposed change of use from residential house Class C3a to a residential home for up to 3 young people aged between 7 and 18 Class C2

  Received 15 Sep, published by the council 20 Sep 2026 Lawful development
• P/2026/2631 Awaiting decision

  17 Northumberland Avenue, Isleworth, TW7 5HZ

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

  Received 15 Sep, published by the council 20 Sep 2026 Lawful development