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

1. 15 Dec 2025

   Received by Hounslow

2. 19 Dec 2025

   Validated

   Checked as complete and ready for consideration.

3. 13 Feb 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

• 45 Thornbury Road, Isleworth, TW7 4LE

  P/2025/3351 Submitted 7 Nov 2025 34m away

  Works to trees within a conservation area. T1. Beech group x 13. Carry out a crown reduction of approximately 2.5 metres in height, pruning back to suitable secondary growth points. T2. Magnolia. Reduce the left-hand side of the crown by approximately 1.5 metres, pruning back to suitable growth points to restore symmetry and balance, while retaining the tree's natural form. T3. Beech hedgerow. Undertake a maintenance prune by removing recent regrowth back to the previous reduction points, maintaining the trees at their established dimensions and retaining a tidy, balanced crown line.

  Granted Trees 4 docs

• 62 Thornbury Road, Isleworth, TW7 4LN

  P/2026/0134 Submitted 15 Jan 2026 44m away

  Certificate of lawfulness for the proposed erection of a detached single storey outbuilding to the rear of the house

  Granted Lawful development 6 docs
  Small domestic

• 62 Thornbury Road, Isleworth, TW7 4LN

  P/2025/3090 Submitted 14 Oct 2025 44m away

  Erection a single storey side and rear extension following the demolition of an existing conservatory to the house.

  Granted Householder Extension Demolition 6 docs
  Small domestic

• 51 Thornbury Road, Isleworth, TW7 4LE

  P/2026/2186 Submitted 28 Jul 2026 71m away

  91% historically approved · decision due ~22 Sep

  Details of Drainage Assessment Form submitted pursuant to conditions 14 of permission P/2025/0901 dated 13/02/26 for erection of one building to provide seven flats with landscaping, cycle parking, waste and recycling facilities following demolition of the existing house and garage.

  Awaiting decision Conditions New dwelling Demolition 12 docs
  Several homes

• 51 Thornbury Road, Isleworth, TW7 4LE

  P/2026/2188 Submitted 28 Jul 2026 71m away

  91% historically approved · decision due ~22 Sep

  Details of Biodiversity Gain Plan and Habitat Management and Monitoring Plan submitted pursuant to conditions 11 and 12 of permission P/2025/0901 dated 13/02/26 for erection of one building to provide seven flats with landscaping, cycle parking, waste and recycling facilities following demolition of the existing house and garage.

  Awaiting decision Conditions New dwelling Demolition 5 docs
  Several homes

• 27A Thornbury Road, Isleworth, TW7 4LQ

  P/2026/0644 Submitted 24 Feb 2026 74m 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

• 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