4 St Marys Crescent, Isleworth, TW7 4NA

1. 19 Feb 2026

   Received by Hounslow

2. 26 Feb 2026

   Validated

   Checked as complete and ready for consideration.

3. 23 Apr 2026

   Decision issued: APPROVED

4. 12 Aug 2026

   Added to PlanIndex

Hounslow granted permission on 23 April 2026, 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.

Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.

• 171 Thornbury Road, Isleworth, TW7 4QG

  P/2025/0538 Submitted 20 Feb 2025 100 yards away

  64% historically approved · decision due ~29 Aug

  Alterations to the existing ground floor commercial unit including replacement of the shopfront, addition of a new entrance door, Installation of a rear lightwell and extension of the rear terrace area with associated external changes to the side and rear elevations.

  Awaiting decision Full applications Extension Windows or glazing 8 docs

• 168 Thornbury Road, Isleworth, TW7 4QE

  PA/2024/2282 Submitted 5 Jul 2024 100 yards away

  Prior Approval notification for the change of use from commercial, financial services (Use Class E(c)(i)) to a single family house (Use Class C3).

  Granted Prior approval 17 docs

• 181 Thornbury Road, Isleworth, TW7 4QG

  P/2026/0849 Submitted 13 Mar 2026 150 yards away

  Works to trees in a Conservation Area. Thuja plicata. Fell to ground level.

  Granted Trees 5 docs

• 211 JERSEY ROAD, ISLEWORTH, TW7 4RE

  PA/2021/3189 Submitted 4 Aug 2021 150 yards away

  Ground floor rear extension 6 metres deep, maximum height of 4 metres, 2.7 metres high to the eaves

  Refused Prior approval Extension 5 docs

• 211 JERSEY ROAD, ISLEWORTH, TW7 4RE

  P/2021/3183 Submitted 3 Aug 2021 150 yards away

  Certificate of Lawfulness for the proposed erection of front/side/rear roof wraparound extension to the existing house

  Refused Lawful development Extension 5 docs

• 209 JERSEY ROAD, ISLEWORTH, TW7 4RE

  P/2023/0874 Submitted 20 Mar 2023 150 yards away

  Work to tree within conservation area: Crown reduction and cutting back roots of large magnolia tree in the driveway

  Granted Trees 6 docs

• P/2026/2304 Granted

  18 Clifden Road, Brentford, TW8 0PF

  Erection of a side and rear extensions.

  Received 7 Aug, published by the council 12 Aug 2026 Householder
• P/2026/2804 Awaiting decision

  128 Durham Road, Feltham, TW14 0AE

  Erection of a detached outbuilding in the rear garden following demolition of existing shed.

  Received 2 Oct, published by the council 9 Oct 2026 Householder
• P/2026/2301 Granted

  4 Glebe Street, Chiswick, W4 2BG

  Erection of a front side and rear side infill extensions with alterations to the rear elevation, a rear side first floor infill extension with replacement of windows to the rear elevation and installation of new rooflights to the existing ground floor infill extension of the house

  Received 7 Aug, published by the council 16 Aug 2026 Householder
• P/2026/1167 Granted

  20 Firs Drive, Hounslow, TW5 9TD

  Erection of part one, part two-storey side extension following demolition of existing garage and part one, part two-storey rear extension. Raising of roof ridge, erection of rear roof extensions, and installation of one front roof window.

  Received 15 Apr, published by the council 26 Jul 2026 Householder
• P/2026/2025 Granted

  1 Kneller Gardens, Isleworth, TW7 7NP

  Erection of a single storey rear and first floor side extension incorporating the conversion of the existing garage to a habitable room

  Received 8 Jul, published by the council 26 Jul 2026 Householder