Chimney Breast Removal Kennington

Georgian brickwork around Cleaver Square is lime-mortared and less forgiving than later work, so propping and cutting have to be patient and properly sequenced. Whatever stack stays goes onto a beam bearing on new padstones. We appoint the engineer, follow their design exactly, and make good in materials suited to the age of the house.

In Kennington, 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 Kennington.

How the job runs

1. Free site survey at your Kennington 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 Lambeth 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.

Supporting the stack in Kennington terraces

Most Kennington houses still carry their original chimney breasts, and in these period terraces the stack is heavy masonry that runs the full height of the building. You cannot simply remove the breast on a lower floor and leave everything above it hanging in mid-air, which is exactly the dangerous shortcut we are sometimes called in to correct. A structural engineer assesses what the stack weighs and how best to carry it before any brick is touched.

Where you keep the stack higher up, the retained masonry is carried on a steel beam bearing on padstones, or on gallows brackets only where the engineer and building control accept them for the load. Taking the full-height stack down is sometimes possible, but around Cleaver Square and the Oval a stack seen from the street is usually expected to stay, as the section below explains. We follow whichever solution the engineer's figures justify, never a guess.

Housing in Kennington

Of the 8,500 homes the valuation list records in Kennington, 28% were built before 1919, 12% between the wars and 60% since 1945; 82% are flats and 18% are houses. Since most homes here are flats, post-war blocks in Kennington rarely have breasts, so one in a flat is checked by the engineer first.

Kennington chimney stacks and a roofscape the conservation statement protects

The Kennington Conservation Area Statement describes the roofscape as one of its most evocative features, and says roof extensions are unlikely to be appropriate in most cases. Chimney stacks are a large part of that roofscape. Taking out a breast inside a Kennington house is a building regulations job, but taking the stack off above the roof changes the view the statement values. Keep the stack on steel in the roof space where the flues are redundant, and treat its removal as a planning question for Lambeth, not a builder's decision.

Inside the house, Lambeth lists removal of a chimney breast as its own building control item, charged at the same level as a through lounge. That is useful for a Kennington owner planning both at once. The engineer can design one scheme that takes the breast out and opens the rooms, and the application can describe both, so one application and one inspector cover the whole structural package. Show the retained stack, the beam carrying it and the new opening on one drawing, since that is what the inspector checks against.

Party wall and building control in SE11

In Kennington's tightly packed terraces the chimney stack almost always sits within the party wall shared with the house next door. Removing the breast, or bolting gallows brackets into that shared wall, is notifiable under the Party Wall Act, so you, as building owner, serve notice on your neighbour before work begins. We give you the drawings and method statement the notice needs and build to any award, which keeps the project moving without friction.

The structural support is a Building Regulations matter, and Lambeth Council's building control signs it off against the engineer's design; internal chimney work does not need planning permission. We handle the rest of the sequence: appointing the engineer who produces the calculations, safe propping and removal, capping any redundant flue with ventilation to stop damp forming, and replastering so there is no sign a breast was ever there. In a listed SE11 home listed building consent is needed before any of this, inside as well as out.

When the outside of the stack needs consent

Inside the house this is building control work and nothing to do with planning. The position changes once you propose to take the stack down above the roof, because that alters the external appearance of the building. Much of Kennington around Cleaver Square and the streets towards the Oval sits in a Lambeth conservation area, where the rhythm of chimneys along a Georgian roofline is part of what the designation protects.

In practice that means a stack visible from the street is often expected to stay, even where the flues below have gone. Retaining it is straightforward: the masonry in the roof space is carried on a beam, or on brackets where the engineer and building control accept them, and the pots are left in place. Where the property is listed, listed building consent is needed for external work and for altering original internal fabric. We establish which category your house falls into at survey rather than assuming, and speak to Lambeth before any external work is priced.

• Building control notification and inspection sign-off
• Flue capping with ventilation to keep the stack dry
• Loft inspection of the retained stack before work starts

VOA Council Tax stock of properties, March 2025, for Lambeth Walk & North Kennington and Oval. Counts rounded by the VOA.

Useful next reading for a chimney breast removal project in Kennington: home renovation in Kennington, chimney breast removal across Lambeth, builders across London, the Party Wall Act for a breast in a shared wall, chimney breast removal anywhere in London and Building Regulations Explained.

Why Kennington Homeowners Choose GS Renovation

Kennington 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, Lambeth building control managed end to end, tidy working in an occupied period home, and a squared-off result signed off by building control, 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.