Loft conversion in Bromley and Bickley

Test the roof space before settling on a layout.

Start with the loft conversion brief

A measured roof survey should establish headroom, structural spans and where a staircase could meet the floor below. Plan the stair, escape route, insulation and building services together before treating the loft as another room.

Compare the proposed roof shape with the address-specific design guidance below. Record chimneys, shared walls and neighbouring rooflines, then ask the appointed designers to identify the structural work and consents the proposal needs.

The local building context

Bromley Council’s Urban Design Guide of July 2023 describes Bickley as a predominantly residential suburban area of mainly detached houses, with no clearly defined centre; public open space is limited, but well-spaced houses have large gardens. It describes the conservation area there, listed by the council as Bickley Park and designated on 28 October 1986, as around 90 mainly residential properties, mostly large houses on spacious plots, together with St George’s Church of 1864, and notes good examples of Arts and Crafts buildings, a style mirrored in modern housing throughout Bickley.

Bromley Town Centre Conservation Area, designated in January 1985, has an appraisal and management plan adopted on 25 June 2025 replacing the 2011 version. Beyond its High Street, Market Square and lower London Road spine, it has homes: North Street, West Street and Queen’s Road contain residential properties, Queen’s Road with pairs of two-storey red brick Victorian houses with canted bay windows. From the Kentish Way junction east to 85 Widmore Road on the north side and 60 on the south, the council wants to keep the character of a residential road with elegant rows of houses on either side.

Take 35A Chislehurst Road: listed Grade II, it stands in Bickley, inside the Bickley Park Conservation Area. A BR1 postcode tells you no more. It does not show whether the Area of Special Residential Character, a conservation area or an Article 4 direction covers a house, or whether it is listed. A ward name such as Bickley & Sundridge, one of the 22 wards in use since 2022, does not show it either, and the ward order’s text sets out no boundaries. Look the house up on the council’s interactive map, the Article 4 list and any list entry, then read the title or lease and the planning history.

Local design and consent context

The Bickley ASRC direction, made on 3 March 2021 and sealed on 15 March 2021, was confirmed to come into effect on 15 March 2022. Its schedule removes Part 1 Class AA, the right to add storeys to a house, and Part 20 Classes A and AA to AD, which allow new homes to be built on top of existing buildings; it does not deal with ordinary extensions, and it applies only inside the ASRC boundary. A separate 2023 direction for the Southborough Road, Bickley neighbourhood centre, later modified by the Secretary of State, concerns changing commercial premises into homes; it does not cover houses.

None of the documents on the council’s Article 4 list is named for the Bickley Park, Mavelstone Road, Sundridge Avenue or Bromley Town Centre conservation areas. That is an absence on a list, not proof that no direction touches a given house, so check the council’s map for the address.

The Bromley Local Plan was adopted as the statutory Development Plan on 16 January 2019 and is used with the London Plan. For extensions, Policy 6 asks that scale, form and materials respect or complement the house and that dormers suit the roofscape and sit away from prominent roof pitches unless dormers are a feature of the area; Policy 8 normally requires at least 1 metre to the side boundary for two or more storeys. The Urban Design Guide, a supplementary planning document adopted on 5 July 2023, is guidance and does not set new policy.

Access and site planning

A skip on the public highway needs Bromley’s temporary highway licence, which only skip companies on the council’s register can apply for; it is valid for two weeks, and the council asks you to allow two working days for processing. No licence is needed on a private road where public access is restricted or controlled, but an unadopted road the public can pass along still needs one. For the red routes, the A21, including Kentish Way, and the A232, the council sends enquiries to Transport for London, which licenses skips there, and it grants no parking dispensations on them. Scaffolding or a hoarding on the highway needs consent too; a parking bay suspension needs an application at least three working days before it starts.

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The Bromley and Bickley area guide · Loft conversion across London · Hampstead Architecture & Planning · Hampstead Chartered Surveyors

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