Skip to content
PlanIndex Get alerts
Menu

Planning application

24 Thornbury Avenue, Isleworth, TW7 4NQ

Refused Hounslow P/2025/3152 PF-Full Applications

Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.

Proposal

Change of use from a residential house (C3) to a Large House in Multiple Occupation (Sui Generis).

As published by the council, reference P/2025/3152

Application record

Reference
P/2025/3152
Type
PF-Full Applications
Status
Decided: REFUSED
Decision
REFUSED
Received
20 Oct 2025
Validated
6 Jan 2026
Decided
17 Apr 2026
Ward
Osterley & Spring Grove
Postcode
TW7 4NQ

Site history

Applications at this address on the Hounslow register

This site has had 2 applications since 2021: 1 approved, 1 refused.

  • P/2021/2046 Granted

    24 THORNBURY AVENUE, ISLEWORTH, TW7 4NQ

    Variation of Condition 2 (approved plans) and Condition 3 (no additional windows and doors) to improve the appearance and utility of the extension of planning application 01118/24/P1 approved under appeal dated 30/11/2020 for erection of single storey rear extension and side and rear roof dormer extensions with one front roof window to the house and alteration to fenestration.

    Decided 19 Jul 2021 Householder

Timeline

Dates from the published record

  1. 20 Oct 2025

    Received by Hounslow

  2. 6 Jan 2026

    Validated

    Checked as complete and ready for consideration.

  3. 17 Apr 2026

    Decision issued: REFUSED

  4. 12 Aug 2026

    Added to PlanIndex

Documents

Plans, drawings, consultee responses and the officer's report

12 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Trade members open them from here.

Open the documents

What this refusal means

Hounslow refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 24 THORNBURY AVENUE, ISLEWORTH, TW7 4NQ

    P/2021/2046 Submitted 24 May 2021 0m away

    Variation of Condition 2 (approved plans) and Condition 3 (no additional windows and doors) to improve the appearance and utility of the extension of planning application 01118/24/P1 approved under appeal dated 30/11/2020 for erection of single storey rear extension and side and rear roof dormer extensions with one front roof window to the house and alteration to fenestration.

    Granted Householder Extension Loft or dormer +1 5 docs
    Small domestic

  • 28 Thornbury Avenue, Isleworth, TW7 4NQ

    P/2024/1877 Submitted 6 Jun 2024 16m away

    Erection of a single storey rear infill replacing the existing conservatory, part single storey rear extension, side and rear roof extension and detached outbuilding at the rear of the garden

    Granted Full applications Extension 26 docs
    Small domestic

  • 30 Thornbury Avenue, Isleworth, TW7 4NQ

    P/2026/1623 Submitted 1 Jun 2026 26m away

    Works to tree in a Conservation Area. T1. Apple. Fell to ground level and grind out stump. Rear garden (east boundary)

    Granted Trees 4 docs

  • 23 Thornbury Avenue, Isleworth, TW7 4NF

    P/2025/3117 Submitted 15 Oct 2025 38m away

    Retrospective permission for the existing rear canopy.

    Granted Householder 7 docs
    Domestic

  • 21 Thornbury Avenue, Isleworth, TW7 4NF

    P/2025/2580 Submitted 21 Aug 2025 41m away

    Installation of render the front and side elevation and installation of external wall insulation and render to the rear elevation of the house.

    Granted Householder 7 docs
    Domestic

  • 31 THORNBURY AVENUE, ISLEWORTH, TW7 4NF

    P/2023/0164 Submitted 17 Jan 2023 44m away

    Retrospective application for the erection of a single storey side and part rear extension, roof extension with rear and side dormers and roof windows; changes to front boundary wall, rendering of external walls and replacement windows and doors.

    Refused Householder Extension Loft or dormer +1 9 docs
    Small domestic

In Hounslow

  • 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