88 Syon Lane, Isleworth, TW7 5NQ

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

• P/2025/3300 Granted

  88 Syon Lane, Isleworth, TW7 5NQ

  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

  Decided 12 Dec 2025 Lawful development

1. 30 Oct 2025

   Received by Hounslow

2. 8 Dec 2025

   Decision issued: PRIOR APPROVAL IS NOT REQUIRED

3. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 8 December 2025, 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.

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. 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

• 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

• 104 SYON LANE, ISLEWORTH, TW7 5NJ

  PA/2021/2710 Submitted 2 Jul 2021 50 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

• 1 SYON PARK GARDENS, ISLEWORTH, TW7 5NE

  P/2021/1731 Submitted 4 May 2021 50 yards away

  Certificate of Lawfulness for the erection of a hip to gable and rear roof extension with juilet balcony and two front roof windows to the house

  Granted Lawful development Extension Loft or dormer +1 10 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

• 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

• PA/2026/2437 Refused

  17 Orchard Road, Brentford, TW8 0QX

  Ground floor rear extension 5.51 metres deep, maximum height of 2.80 metres, 2.06 metres high to the eaves

  Received 26 Aug, published by the council 2 Sep 2026 Prior approval
• PA/2026/2481 Refused

  6 Speart Lane, Hounslow, TW5 9EF

  Ground floor rear extension 8.00 metres deep, maximum height of 3.00 metres, 2.80 metres high to the eaves

  Received 1 Sep, published by the council 5 Sep 2026 Prior approval
• PA/2026/2768 Awaiting decision

  86 Kneller Gardens, Isleworth, TW7 7NW

  Ground floor rear extension 4.50 metres, maximum height 3.20 metres, 2.70 metres high to the eaves.

  Received 30 Sep, published by the council 6 Oct 2026 Prior approval
• PA/2026/2393 Granted

  2 Letchworth Avenue, Feltham, TW14 9RY

  Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 2.85 metres high to the eaves

  Received 18 Aug, published by the council 23 Aug 2026 Prior approval
• PA/2026/2364 Granted

  9 Westbourne Road, Feltham, TW13 4LX

  Ground floor rear extension 4.5 metres deep, maximum height of 2.8 metres, 2.8 metres high to the eaves

  Received 13 Aug, published by the council 23 Aug 2026 Prior approval