Chimney Breast Removal Soho
Chimney breast removal with steel beam support in Soho, the beam sized by the engineer we appoint and the work signed off by building control.
- Rated 4.9 from 31 reviews on MyBuilder
- London guide: £2,200 to £3,250
- Free site survey, itemised quote
Upper-floor flats above the shops on Dean Street and Berwick Street are awkward jobs: no parking, narrow stairs and a business trading underneath. We bag the masonry and carry it out by hand, work to the engineer's beam design so the stack above stays properly supported, and book building control in for inspection at the right stages.
In Soho, 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 Soho.
Price guide
| Work | Indicative London range |
|---|---|
| One floor, steel beam (the usual route) | £2,200 to £3,250 |
| One floor, gallows brackets where the engineer and building control accept them | £1,500 to £2,500 |
| Two floors | £3,000 to £5,000 |
Indicative London ranges (MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: Chimney Breast Removal Guide.
How the job runs
- Free site survey at your Soho address: which floors the breast runs through, a shared stack, any live flue.
- The engineer we appoint designs the support, and the work is registered with Westminster City Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
- The floor above is propped and the breast comes down in courses from the top; what remains sits on the support the engineer specified.
- Building control inspects the support before it is covered. We make good, and the completion certificate follows.
Removing a chimney breast in Soho
Most of Soho's period buildings still carry their original chimney breasts, and homeowners reclaim the floor space by removing the ones no longer used for a fire. Because the breast forms part of the masonry and helps carry the brickwork above it, this is a structural job, never a simple demolition. We start with a structural engineer's assessment of exactly what the stack and breast are supporting on each floor.
Where a breast is removed on a lower floor but the stack above is kept, that retained masonry is usually carried on a steel beam on padstones designed by the engineer, with gallows brackets only where the engineer and building control accept them. In many W1 buildings the flue runs full height, and there it is often cleaner to remove the whole stack and make the roof good. We never leave a stack unsupported.
Housing in Soho
Take the 6,840 or so homes the valuation list gives the Fitzrovia West & Soho statistical area: 98% flats, 2% houses, 48% from before 1919, 5% interwar and 47% post-war. Since most homes here are flats, a chimney breast in a flat in Soho often supports the breasts in the flats above, so removal needs the freeholder's licence and designed support.
Is it a chimney breast at all in a Soho flat
Before anyone plans a removal in Soho, it is worth confirming what the projection in the room is. In Soho 47% of homes were built after 1945 and 27% in 2000 or later. In a newer building a boxed-out column or a service riser can look like a breast while carrying the frame, the plumbing stack or the ventilation for the whole block. None of those can simply be taken out. In the older stock it is more likely to be a true breast, and on an upper floor the flues from flats below may still run through it. The structural engineer we appoint has a small inspection hole opened before any design is drawn.
Where it is a real chimney, the stack above the roof is part of the Soho townscape. The Soho Conservation Area was designated in 1969 and extended several times since, and in a conservation area planning permission is needed for demolition and for some alterations that would not need it elsewhere. Taking a stack down can be a visible change of that kind, and in a flat the lease decides whether the stack is yours to touch at all. So the practical plan in a Soho flat is to remove the breast inside, support what remains above on steel and leave the stack alone.
Party wall and building control in W1
Soho's buildings sit wall to wall, so the chimney stack almost always lies within the party wall you share with the building next door. Removing the breast, bearing new steel into that wall or taking the stack down are all works to the shared structure, which makes them notifiable under the Party Wall Act. You serve the party wall notice as building owner (or your surveyor does); we give you the drawings and programme it needs and build to any award. That way nothing is done to the shared wall without the proper agreement in place.
The structural support for the retained stack is notifiable under the Building Regulations, and Westminster City Council's building control inspects and signs it off. We manage the lot: the engineer we appoint for the calculations, safe removal and propping, capping any redundant flue with ventilation to guard against damp, then replastering so there is no sign the breast was ever there. The room is left squared off, clean and ready to decorate.
Checking for asbestos before anything is broken
Any Soho flat altered between the 1950s and the late 1990s may contain asbestos, and a chimney breast is a place it turns up. Textured coatings on the ceiling, insulating board used to block a fireplace opening, old flue packing and the backing to a night storage heater are all candidates. Breaking any of them out without knowing releases fibres through a small flat in minutes.
So where the age and construction suggest it, a refurbishment and demolition survey is carried out before we start, and the results decide the method. Non-licensed materials can be removed with controlled methods and correct disposal; licensed materials go to a licensed contractor with the appropriate notification. Nothing is drilled, sanded or broken until that is settled. It adds a few days at the front of the job and it is not a step we skip, whatever the programme pressure from the business trading below.
Tenanted flats, agents and access
A good number of Soho flats are let rather than owner occupied, and that changes the job before it changes the method. A landlord ordering the work needs the tenant on side, because somebody has to give access each morning and somebody has to live with a room out of use. Agreeing dates through the managing agent well in advance avoids the far more expensive problem of a crew standing outside a locked door on Dean Street.
Where a flat is between tenancies the answer is simple, and that is when we would suggest doing it. Where it is not, we work one room at a time and hand back a clean, usable space each evening rather than leaving tools and sheeting spread through the flat. Around Berwick Street Market the loading restrictions mean deliveries and collections are timed to the hour, so a confirmed access slot matters more here than almost anywhere else.
- Bedroom breast removal to reclaim usable floor space
- Soot and debris contained with screens and sheeting
- Rubble bagged and carried out rather than dropped inside
VOA Council Tax stock of properties, March 2025, for the Fitzrovia West & Soho statistical area, which also covers west Fitzrovia. Counts rounded by the VOA.
Trusted Chimney Breast Removal in Soho
Soho 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, usually a steel beam, with gallows brackets only where the engineer and building control accept them, Westminster building control inspections booked and met, tidy working in an occupied W1 home and a result signed off by building control, backed by our founder's 30+ years on the tools.
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
Saaid is the best craftsman I have worked with. He knows what he is doing from the very beginning. He has a great knowledge of construction…
FAQ
Frequently Asked Questions about Chimney Breast Removal Soho
What does the chimney breast removal quotation for a Soho home cover?
A Soho quotation for chimney breast removal sets out scope, programme and price on one document, within £2,200 to £3,250 for one floor on a beam (indicative). It shows what is done, in what order and at what cost, and the order is not arbitrary: the stack above is supported before the breast below comes out. Exclusions are stated plainly rather than left to be discovered once work starts at the W1 property.
What approvals should be on file for a Soho chimney breast removal?
Building Regulations approval as a minimum, and usually more. In W1 that means Westminster City Council's completion certificate, the structural engineer's design behind it, and evidence of party wall notice on a building this tightly packed. Listed building consent applies where the property is designated, and leasehold consent where the flat sits above commercial premises. We collate the set at handover so it exists when you come to sell.
My Soho flat is in the middle of the building. Whose chimney breast holds up what?
Your breast carries the breasts above it, and the flues from the flats below usually pass through it. Removing it means supporting everything above on steel and confirming every flue from below is redundant, because cutting a live flue affects a neighbour's appliance. The freeholder's consent, and notice to the other owners, come before any design.
Can a chimney breast be removed in a listed Soho building?
Only with listed building consent, because it is an internal structural alteration. Fireplaces and chimney breasts may be part of what the listing protects, so consent is not guaranteed. Building control approval and the freeholder's licence are needed too, and none of these should be assumed from a neighbour's past work.
How is the stack above a Soho chimney breast supported when access is tight?
Usually on steel made in lengths two people can carry up a narrow stair and bolt together in the room; gallows brackets are an option only where the inspector agrees to them. If a bearing lands in the wall dividing your building from the one next door, that owner is served notice two months or more ahead. Props hold the stack until the steel is packed tight.
What happens to the redundant flue after a Soho chimney breast removal?
It is capped and ventilated. The top of the flue is capped on the roof, which in a block is usually the freeholder's property, so roof access is arranged with them. A vent is left lower down to keep air moving. Without that, moisture and soot deposits come through the new plaster.
Which Westminster application route suits a chimney breast removal in a Soho flat?
Full plans, for almost every Soho home, since 98% are flats. Westminster accepts full plans, building notice or regularisation, but it limits the building notice to work that leaves the layout unchanged and sits outside the Fire Safety Order (RRO). A Soho flat usually shares a stair and entrance, sometimes with a business, so the Order is engaged, and the engineer's design for the support is best checked before any masonry is cut.
Does a Soho flat built after 2000 have a chimney breast to remove?
Check before assuming one. In Soho 27% of homes were built in 2000 or later, and a recent building may have a boxed structural column or a service shaft where an older one had a breast. Those are part of the frame or the shared services, so they stay. The building's as-built drawings, held by the managing agent, answer the question quickly.
When must Westminster hear that a Soho chimney breast removal is starting?
At least 2 days before work starts, on the application form or by email. In a Soho building that notice sits alongside two others: the date given to any neighbouring flats whose flues pass through the breast, and the date agreed with any business below for the noisy stage. We line all three up so the propping, the cutting and the first inspection happen in one planned week.
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