Chimney Breast Removal Pimlico

In the stucco terraces around St George's Square the stack is shared masonry, sitting squarely in the party wall you hold in common with next door. That makes removal notifiable, so you serve Party Wall Act notice early and keep the adjoining owner informed. The stack that stays is then carried on a beam, and the wall replastered.

In Pimlico, 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 Pimlico.

How the job runs

1. Free site survey at your Pimlico 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 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.
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 breast removal in Pimlico's terraces

Most of Pimlico's stucco townhouses were built with multiple flues, so the breasts run up through several floors. Homeowners often want to reclaim the space in a bedroom or reception room, but the breast is carrying the masonry of the stack above it, so this is never a simple bit of demolition. We start every job with a structural engineer's assessment of exactly what the breast supports.

Where a breast is removed on a lower floor while the stack above stays, we support that retained stack on a steel beam bearing onto padstones, or on gallows brackets bolted into the party wall only where the engineer and building control accept them. In these tall townhouses the stack often runs the full height of the building, and in that case it is frequently cleaner to remove the whole stack and make the roof good.

Housing in Pimlico

For Pimlico the Council Tax list gives about 10,180 homes; by type 94% flats and 6% houses, by age 34% post-war, 10% interwar and 55% older than 1919. Most homes here are flats, and a chimney breast in a flat in Pimlico often supports the breasts in the flats above, so removal needs the freeholder's licence and designed support.

Pimlico chimney stacks inside a conservation area audited since 2006

The Pimlico Conservation Area was first designated in 1968 and extended several times, and its conservation area audit was adopted on 10 April 2006. That audit is worth reading before a chimney breast comes out, because Westminster's audits pick out locally significant buildings, which the council terms unlisted buildings of merit. Those buildings are not on the statutory list, so for them an internal breast removal remains a building regulations and lease matter. A listed Pimlico house needs listed building consent for the breast as well. The audit matters more for anything visible on the roof, where the stacks and pots are part of the terrace's roofline.

Taking a stack down above the roofline is therefore a separate decision from removing the breast inside. Westminster requires planning permission in its conservation areas for demolition, and for some alterations that would escape control in other places. A Pimlico owner who wants the stack gone should ask the planners first and treat removal as conditional on their answer. Retaining the stack on a steel beam avoids the planning question, leaves the roofline untouched and, in an unlisted building, keeps the job within building control, which is why that option is set out first.

Party wall and building control in SW1

Pimlico's terraces are built wall to wall, so the chimney stack almost always sits within the party wall shared with the neighbour. Removing the breast, or bearing a beam or brackets into that shared wall to hold the stack, is notifiable under the Party Wall Act, so you serve notice on the adjoining owner as building owner before any work starts, using the drawings we supply.

The structural support for the retained stack is notifiable under the Building Regulations, and Westminster City Council's building control signs it off. We handle the whole sequence: appointing the engineer who designs the support, safe removal with propping, capping any redundant flue with ventilation to keep damp out, and replastering so the wall reads flat and finished.

Protecting a period interior during the work

Breaking out a chimney breast in an SW1 townhouse generates fine soot and brick dust that travels through a house far more readily than people expect, and the finishes it settles on are not easily replaced. Original pine boards, run cornice, shutters and marble surrounds all need protecting properly rather than covering with a dust sheet and hoping. Floors are boarded and taped, and openings are sealed with screens rather than left open. An air scrubber running in the room takes most of the airborne dust out before it reaches the rest of the house.

We work with dust extraction on the tools and clear the flue of soot before any breaking begins, because the soot is what does the damage. Debris is bagged at the point it is created and taken out along a protected route, not carried loose down a stair. Where a room next door has finishes that cannot be replaced, we seal the connecting doorway completely and use another route, even where it makes the work slower.

• Ceiling and joist support where the breast carried them
• Hearth removal and floor structure reinstatement
• Loft inspection of the retained stack before work starts

VOA Council Tax stock of properties, March 2025, for Pimlico North and Pimlico South. Counts rounded by the VOA.

When comparing chimney breast removal in Pimlico with other work, it helps to read home renovation in Pimlico, chimney breast removal across Westminster, builders across London, party walls and chimney breasts, chimney breast removal across London and Building Regulations Explained.

Why Choose GS Renovation in Pimlico

Pimlico homeowners choose GS Renovation because we treat chimney breast removal as the structural job it is. You get an engineer-designed support solution, a steel beam on padstones or gallows brackets only where the engineer and building control accept them, fitted correctly, with Westminster building control inspection and sign-off, tidy working in an occupied period home, and a certified result, 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.