Chimney Breast Removal Chesham

Removing a chimney breast frees floor space in a room, and raises a question about what carries whatever stays above it. That is answered by a structural engineer, whom we appoint, usually with a steel beam, and with gallows brackets only where the engineer and building control accept them. We build to their design and never produce the calculations ourselves. This page covers what a chimney breast removal involves on a Chesham property, and the consent questions that come with it.

For Chesham, on London-derived ranges removing a breast on one floor typically costs £2,200 to £3,250 on a steel beam, and £3,000 to £5,000 across two floors; Buckinghamshire work generally runs below that. GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Chesham.

How the job runs

1. Free site survey at your Chesham address: which floors the breast runs through, a shared stack, any live flue.
2. The engineer we appoint designs the support, and the work is registered with Buckinghamshire Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
3. The floor above is propped and the breast comes down in courses from the top; what remains sits on the support the engineer specified.
4. Building control inspects the support before it is covered. We make good, and the completion certificate follows.

In Chesham South, 1,044 of 3,108 households are in terraced houses

In the Chesham South area, which covers the town centre and Waterside, the 2021 census counted 1,044 households in terraced houses and 281 in detached houses out of 3,108 in total. Across the town as a whole, terraced houses accounted for 2,551 of the 9,395 households counted. In a narrow terraced room, a chimney breast takes floor area that cannot be recovered anywhere else.

Removing one on a single floor leaves the stack above needing support, now usually a steel beam on padstones, since LABC withdrew its standard gallows bracket detail in 2024; gallows brackets are used only where the engineer and building control accept them. That decision belongs to the structural engineer we appoint, and it moves the price, so we settle it before quoting rather than after.

Housing in Chesham

Chesham has around 9,950 homes on the Council Tax list: 71% post-war, 12% interwar and 17% predate 1919, with 25% flats and 75% houses. A terrace breast in Chesham usually sits on the party wall, so removal needs a notice, and 31% of homes here are terraced.

Chesham's design code treats a chimney as part of the building

The Chesham Design Code says chimneys can be included in a new building, should be constructed using brick, and should be integrated into the heating and ventilation system. That is guidance for new build, not a rule about your existing stack. It does show how local design guidance views a chimney, which is worth knowing before a stack is taken down to roof level and the roofline changes.

Heritage designations can change what happens to a stack

The Chesham Conservation Area is numbered T10 and was designated in 1970 under the Civic Amenities Act 1967, as amended by Chiltern District Council in 1987. Policy CHESH6 of the neighbourhood plan also identifies Local Chesham Heritage Assets, which are non designated heritage assets and are not statutory listed buildings. Either can bear on a stack that is visible from the street.

We are a contractor, so those are not our decisions to make. What we do is raise them before the scaffold is ordered, and put the building control application in for the structural work. Where a planning or listed building consent is needed, it has to be in place before we start.

• Hearth removal and floor structure reinstatement
• Structural engineer's calculations arranged and followed
• Gallows brackets only where the engineer and building control accept them

VOA Council Tax stock of properties, March 2025, for Chesham West, Chesham East and Chesham South. Counts rounded by the VOA.

Related reading for Chesham homeowners planning chimney breast removal: home renovation in Chesham, chimney breast removal in Amersham, builders across London, the Party Wall Act for a breast in a shared wall, how we handle chimney breast removal across London and Party Wall Act Explained.

Trusted Chimney Breast Removal in Chesham

A chimney breast removal is judged on what happens above the part you take out. Whether the remaining stack sits on a steel beam or, where the engineer and building control accept them, on gallows brackets is a decision for the structural engineer we appoint, and it moves the price, so it is settled before the quotation rather than after. We also check the conservation area and local heritage position before the scaffold is booked, because a stack visible from the street can be a consent question. One point of contact covers the engineer, the builder's work, the making good and the building control sign off. GS Renovation Ltd is fully insured, and quotations are free and without obligation.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.