House extension in Kensal Rise

Connect the added space to the existing home.

Start with the house extension brief

Begin with how the new space will meet the old rooms, garden and circulation. A measured brief should record boundaries, levels, existing drains, neighbouring windows and the parts of the building you intend to keep.

Develop daylight, structure and services alongside the floor plan. Agree which openings and finishes are included, how the existing home will be protected during construction and which decisions need surveys or approval before a quotation.

The local building context

Chamberlayne Road was laid out from 1893 and reached the railway station by 1895. The appraisal describes continuous parades of Victorian shops along it, with Kensal Rise Station and the Station Terrace public realm at the heart of the conservation area. The parades at 47–65, 67–83 and 85–101 have homes on their upper floors; their roofscape is generally well preserved, with natural slate roofs and tall chimneys, and two- and three-storey rear outriggers remain prominent. The Edwardian parade at 103–119 dates from 1912, and Keslake Mansions on Station Terrace was built between 1898 and 1900.

Clifford Gardens, built in 1896 by Charles Langler and Charles Pinkham, is in the appraisal’s view the finest surviving residential street off Chamberlayne Road, and it calls the street unique in Brent because the whole of it carries decorative plaster pargeting to the gables. The houses look semi-detached but are joined in terraces of twelve, in London stock brick with red brick dressings and double-height bays; the original timber sashes had an upper sash half the size of the lower. Despite lost original windows and a few large rear dormers, the original form survives.

Brent’s appraisal places Kensal Rise at the south-east edge of the borough, and to the south Harrow Road marks the boundary with Kensington and Chelsea. In part of Brent the Old Oak and Park Royal Development Corporation, not the council, is the planning authority, and the Queen’s Park name is also used by a separate Westminster conservation area. Neither the place name nor an NW10 postcode settles the council, a conservation boundary, a listing, Article 4 coverage or the consent route: confirm the council and planning authority and, for a Brent address, check Brent’s interactive policies map, the list entry, any Article 4 direction’s plan, the lease or title and past planning decisions.

Local design and consent context

Brent’s Cabinet designated the Kensal Rise Conservation Area on 28 May 2024, one of the borough’s 22, and the same day adopted its character appraisal as a supplementary planning document, making it a material consideration in planning decisions. Historic England supported the designation, describing the townscape as a surprisingly complete collection of Victorian and Edwardian buildings. Brent lists an appraisal, a map and a non-immediate Article 4 direction for the area, but no design guide.

The appraisal sets out how Brent will manage change: original roof forms, including outriggers, are to be maintained; chimneys kept where they are a significant feature; front gardens, soft landscaping, boundary walls, fences and hedges preserved; and replacement windows and doors matched to the original style, design and materials. Where possible, Brent will want proposed materials submitted with an application rather than left to a condition, and it may ask for large-scale construction details.

Where its plan takes in a house, the direction removes the householder rights to enlarge, improve or otherwise alter it, apart from single-storey rear extensions kept within the original side walls, and the rights for other roof alterations, porches, outbuildings, hard surfaces between the front or side of the house and a highway, and chimneys and flues. It also removes the rights for gates, fences and walls on street frontages, the demolition of gates, fences and walls, means of access to a highway, exterior painting other than entrance doors, window frames and sills and British Standard white or off-white on existing render, and solar equipment except on rear roof slopes, water source heat pumps and wind turbines.

Access and site planning

Work out where deliveries will stop and where waste will wait, whether the home is above a Chamberlayne Road shop or in a side street. Brent needs a licence for scaffolding or hoarding on the highway, applied for 14 days ahead, and wants at least 1.2m of pavement left for pedestrians; a licence that blocks the pavement waits for a temporary traffic order, with an 8–10 week lead time. Only skip companies can apply for a skip licence, and no skip may stand on the footway. Materials in a controlled parking zone need a bay suspension; Brent’s pages give different notice periods, so apply early and check with Brent.

Continue planning

The Kensal Rise area guide · House extension across London · Hampstead Architecture & Planning · Hampstead Chartered Surveyors

Discuss your project

Tell us what you are planning in Kensal Rise

Share the property location, the work you have in mind and any drawings or permissions you already have.

£5M public liability, £10M employers’ liability and contractors’ all risks cover.

Design support: Hampstead Architecture & Planning.
Surveying support: Hampstead Chartered Surveyors.