Chimney Breast Removal Bermondsey

In the converted warehouses off Bermondsey Street a redundant flue can run several floors, and sealing it badly leaves a cold, damp shaft behind your plaster. We cap it at the head, vent it low down, and reinstate the wall properly. Masonry above is supported on steel designed by the engineer we appoint for the job.

In Bermondsey, 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 (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Bermondsey.

How the job runs

1. Free site survey at your Bermondsey 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 Southwark 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.

Chimney breasts in Bermondsey buildings

Most of Bermondsey's new-build riverside apartments never had chimneys, but plenty of the converted warehouses and older buildings around SE16 retain original breasts, and homeowners often want them gone to free up floor space in a tightly planned flat. Because a breast helps carry the masonry above it, we never simply cut one out. An engineer first establishes what the stack weighs and what is bearing on it, then designs the support.

On a lower floor with a stack still running above, we support the retained masonry on a steel beam bearing into sound brickwork, or on gallows brackets only where the engineer and building control accept them. Where the stack runs full height and serves nothing, we more often remove it entirely and make good the roof. Leaving a stack unsupported is never an option, whatever the room below looks like.

Housing in Bermondsey

Bermondsey has around 27,150 homes on the Council Tax list: 73% post-war, 12% interwar and 9% predate 1919, with 89% flats and 11% houses. Where most homes are flats, post-war blocks in Bermondsey rarely have breasts, so one in a flat is checked by the engineer first.

Selling a Bermondsey house whose chimney breasts are already gone

In Bermondsey 9% of homes were built before 1919 and 12% between 1919 and 1939, and houses of those ages were built with chimney breasts. When one of those houses is sold and the breasts are already missing, the buyer's solicitor will ask for the completion certificate. If there is none, Southwark Council's online form lets the owner begin a building regulations application as regularisation. In practice that means opening the ceiling or wall where the breast stood so the inspector can see what now carries the masonry above, whether a steel beam, gallows brackets or nothing adequate at all.

Do that opening-up before the house goes on the market if you can. If the support is missing, the structural engineer we appoint designs the fix and we install it under the same regularisation application. In a terrace the breast often backs onto the wall shared with next door, and Southwark's Householder SPD notes that certain works may need a Party Wall Agreement with neighbours, separate from any planning permission. Where new steel has to bear into that shared wall, the building owner serves the notice, and the Bermondsey neighbour's surveyor may want to inspect their side before work starts.

Party wall and freeholder consent in SE16

In converted Bermondsey buildings the chimney stack frequently sits within a party structure shared with the flat next door, so removing the breast or cutting a beam into that wall is notifiable under the Party Wall Act, and you serve notice on the affected neighbour first as building owner, using the drawings we supply. As the flat is leasehold, the freeholder's licence to alter is needed too, and the managing agent will want the engineer's details on file before consenting.

The support work is controlled under the Building Regulations, so Southwark Council's building control inspects and certifies it; this is not a planning matter. We appoint the engineer, prepare the technical package for the freeholder's consent, remove and prop the breast safely, cap and ventilate any redundant flue to prevent damp, and replaster so there is no sign the breast was ever there.

A listed building is the exception: work that affects its character, inside or out, including an extension or taking out a wall or chimney breast, needs listed building consent from Southwark Council, and doing it without consent is a criminal offence.

Working inside a managed warehouse block

A Bermondsey warehouse conversion adds a layer a house does not have, because everything you take out has to travel down through a shared building. The managing agent will want working hours agreed, usually a weekday window, the lift protected or kept clear of rubble, and evidence of our insurance on file before we are let through the door. We arrange all of that ahead of the start date rather than on the morning. Neighbouring flats above and below are told the dates in advance, since the noise in a converted building travels through the structure rather than the air.

Brick from an old flue is heavy and dusty, so it leaves in sealed bags rather than open barrows, through the service entrance at agreed times. Original features complicate the making good. Exposed brickwork, cast iron columns and timber beams are often part of what the conversion was consented on, so we agree with you and the agent what is reinstated in matching brick and what is simply closed up.

• Making good, plastering and reinstating the wall line
• Structural engineer's calculations arranged and followed
• Ventilated caps and airbricks to disused flues

VOA Council Tax stock of properties, March 2025, for all 6 statistical areas in Bermondsey. Counts rounded by the VOA.

For the wider picture around chimney breast removal in Bermondsey, see home renovation in Bermondsey, chimney breast removal across Southwark, how building control signs off a chimney breast removal, party walls and chimney breasts, our London chimney breast removal page and Building Regulations Explained.

Trusted Chimney Breast Removal in Bermondsey

Bermondsey homeowners choose GS Renovation because we treat chimney breast removal as the structural job it is. You get support designed by the engineer we appoint, normally a steel beam, with gallows brackets only where the engineer and building control accept them, the technical package the freeholder's licence to alter depends on, Southwark building control sign-off, and tidy working in an occupied SE16 flat, backed by our founder's 30+ years on the tools.

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.