25B Thornbury Road, Isleworth, TW7 4LQ

1. 11 Feb 2026

   Received by Hounslow

2. 3 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 28 Apr 2026

   Decision issued: APPROVED

4. 12 Aug 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.

More on full applications applications in our guide

• 27A Thornbury Road, Isleworth, TW7 4LQ

  P/2026/0644 Submitted 24 Feb 2026 6m away

  Works to seven trees within a conservation area. Cherry (T1). Leaning and fallen into adjacent trees. Fell to ground level Ash (T2). Leaning and suppressed tree. Fell to ground level Elderberry (T3). Dead/Dying. Fell to ground level Ash (T5). Leaning and suppressed tree. Fell to ground level Sycamore x 3 (T7) Crown lift to 5 metres and reduce overhang to adjacent properties/gardens by up to 2.5 metres.

  Granted Trees 4 docs

• 23 Thornbury Road, Isleworth, TW7 4LQ

  P/2026/1607 Submitted 29 May 2026 14m away

  Works to trees in a conservation area: Front garden. G1. Olive Group. Reduce height by up to 3 metres and reshape. Rear garden. T2. Lawson Cypress. Fell to ground level. T3. Purple Leafed Plum. Reduce crown back to most recent previous reduction and reshape. G4. Cherry. Laurel Reduce height by up to 2 metres and reshape. T5. Hazel. Reduce crown by up to 3 metres.

  Granted Trees 4 docs

• 31 CLIFTON ROAD, ISLEWORTH, TW7 4HJ

  P/2021/1255 Submitted 30 Mar 2021 53m away

  Fell tree in rear garden.

  Withdrawn Trees 1 doc

• 31 Clifton Road, Isleworth, TW7 4HJ

  P/2026/0039 Submitted 8 Jan 2026 53m away

  Works to tree in a Conservation Area. T1 Cherry. Fell to ground level.

  Granted Trees 4 docs

• 225 Spring Grove Road, Isleworth, TW7 4AF

  P/2025/2761 Submitted 10 Sep 2025 67m away

  Works to tree in a Conservation Area - Removal of Ash tree at the rear of the property (5 day notification)

  Granted Trees 2 docs

• Ground Floor Flat, 41 Thornbury Road, Isleworth, TW7 4LE

  P/2025/3707 Submitted 15 Dec 2025 80m away

  Erection of a detached outbuilding in the rear garden to be used as a home office for the ground floor flat

  Granted Full applications 9 docs

• P/2026/1189 Granted

  12 The Grove, Isleworth, TW7 4JZ

  Installation of one front boundary gate and new windows to allow the conversion of existing single family house to five self contained flats with associated refuse and cycle storage.

  17 Apr 2026 Full applications
• P/2026/1937 Granted

  Flat Ground Floor, 102 New Heston Road, Hounslow, TW5 0LF

  Erection of a single storey detached outbuilding for use as a home office in the rear garden of the flat

  30 Jun 2026 Full applications
• P/2026/1494 Granted

  2 Bath Road, Chiswick, London, W4 1LW

  Demolition of the single-storey rear extension, installation of temporary scaffolding to the façade of the building, installation of associated plant equipment, an external condenser unit and acoustic shelter. Internal layout alterations and installation of secondary glazing, external alterations including re-rendering to allow continued use under Class E (c) and (g)(i)

  6 May 2026 Full applications
• P/2026/1936 Refused

  Flat First Floor, 102 New Heston Road, Hounslow, TW5 0LF

  Erection of a rear roof and outrigger extension with two front rooflights to the flat

  30 Jun 2026 Full applications
• P/2026/0592 Granted

  87 Cranleigh Road, Feltham, TW13 4QA

  Erection of a two storey residential house with associated landscaping, private amenity space, cycle and refuse storage.

  19 Feb 2026 Full applications