Seven flats at 51 Thornbury Road, Isleworth

What was proposed

The application proposed demolishing the house and garage and building one two-storey block containing seven flats, with landscaping, parking and storage facilities.

“P/2025/0901 Address: Thornbury Road, Isleworth,TW7 4LE Proposal: Erection of one building to provide seven flats with landscaping, car and cycle parking, waste and recycling facilities following demolition of the existing house and garage. This application is being taken to Planning Committee at the request of Councillor Louki.”

“In addition, and as set out in the submitted Planning Statement, the site has been subject to two recent rounds of pre-application planning advice regarding its potential redevelopment. The first related first to the demolition of the existing dwelling and the construction of seven new flats in a three storey mansion block (ref.”

Officer report

The site and surroundings

The backland site lies behind Thornbury Road homes in the Spring Grove Conservation Area, with residential properties and garages around it.

“Figure 1 – Location Plan 2.1 This application relates to a backland site set to the rear (east) of detached dwellings at 47 and 49 Thornbury Road, accessed from a driveway between 49 Thornbury Road and 22 Weston Gardens. It contains a large two-storey, six-bed detached dwelling and outbuilding, with a large garden to the south.”

“Figure 2 – Existing Site Plan 2.3 The site is in the Spring Grove Conservation Area which extends in all directions. It is not within the setting of any listed or locally listed buildings. Neither the site or the buildings fronting Thornbury Road to the west are identified in the Spring Grove Conservation Area Appraisal as positive contributors, though those on the opposite side to the site access are, as are those to the rear (east) fronting The Grove.”

Officer report

What officers recommended

Officers recommended approval because the scheme provided housing, family-sized flats, good design, suitable accommodation and an 80% carbon reduction.

“The proposal would secure an 80% carbon dioxide emissions reduction against a Building Regulations Part L (2022) baseline. As such, it is considered that the scheme is an appropriate response to the planning framework for the site. The proposal would be in accordance with the objectives and policies of the NPPF, the London Plan and the Local Plan as set out throughout this report. The application is recommended for approval subject to conditions.”

Officer report

What neighbours said

Residents objected to the loss of a family house, privacy, access, waste, traffic, overdevelopment, amenity space and the conservation-area impact.

“The footprint of the building would extend further to the south of the site than is currently the case, over land currently in use as garden. CONSULTATIONS 4.6 Forty neighbouring residents were notified on 10 June 2025. A press notice was published on 13 June 2025 and a site notice 17/06/2025. Six responses were received, as summarised below. Comment Response Loss of a single family house. See paragraph 6.1 – 6.2.”

“Concerns regarding waste collection. See paragraph 6.44 – 6.45. Concerns about street cleaning. A Construction Logistics Plan would be secured by condition. Increased in more ‘car-owning households’ would exacerbate existing traffic congestion and noise pollution. See paragraph 6.38 – 6.43. Overdevelopment of the site and not in keeping with the neighbourhood’s character or Conservation Area. See paragraph 6.4 – 6.6. Inadequate amenity space. See paragraph 6.26 – 6.29.”

Officer report

Who spoke

The planning manager presented the application, the calling councillor and a resident spoke against it, and the architect and developer spoke in support.

The vote

Councillors voted unanimously for approval, with eight votes in favour, none against and no abstentions.

“Cllr Bruce moved approval of the officer’s recommendations seconded by Cllr Stroud-Turp. Members voted unanimously to approve the recommendations.”

“For – 8 votes. Against – None Abstentions – None.”

Minutes

The decision

Planning application P/2025/0901 was approved subject to conditions for one building containing seven flats and associated works.

“Resolved – that planning application P/2025/0901, erection of one building to provide seven flats with landscaping, car and cycle parking, waste and recycling facilities following demolition of the existing house and garage, was approved subject to conditions.”

Minutes