Chimney Breast Removal Catford

The third bedroom in an Edwardian Catford house is often a box room made smaller still by the chimney. Removing the breast frees the one wall long enough to take a bed or a desk. We prop, cut back, install the engineer's beam over the opening, cap the flue and leave the room replastered and square.

In Catford, 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 Catford.

How the job runs

1. Free site survey at your Catford 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 Lewisham 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 Catford's period homes

Most Catford terraces still carry their original chimney breasts, and because the houses are built in tight rows the stacks sit within the party wall shared with next door. The breast helps carry the brickwork and stack above it, so we begin with a structural engineer's assessment of exactly what is being supported before anything is removed.

Where you keep the stack higher up but remove the breast on a lower floor, we support the retained masonry on a steel beam bearing into the party wall, or on gallows brackets bolted into it only where the engineer and building control accept them. In many SE6 houses the sensible option is to take the whole stack out down to roof level and make the roof good.

Housing in Catford

Catford has about 7,650 homes on the Council Tax list: 61% pre-1919, 4% interwar and 33% post-war, with flats making up 66% and houses 34%. A chimney breast in a flat in Catford often supports the breasts in the flats above, so removal needs the freeholder's licence and designed support, which matters here because most homes are flats.

Fitting a Catford chimney breast removal into the wider job

In Catford a chimney breast can come out as part of a bigger job: when a rear extension is built, when a kitchen moves, or when a bedroom is replanned. Lewisham names removal or partial removal of chimney breasts among the structural alterations needing building control approval, and its fees chart has a single line for a single storey extension including removal of a chimney breast. Where both are planned for a Catford house, putting them on one application keeps the drawings consistent and lets the structural engineer we appoint design the stack support and the extension steel together.

Above the roof, a different rule can apply. Lewisham lists alterations to the roof of a house as changes needing planning permission under an Article 4 direction, and its Article 4 directions in conservation areas only apply to houses that are in use as a single dwelling house. For a Catford house covered by a direction, taking the stack down as well as the breasts can therefore raise a planning question. The simpler route is to keep the stack, support it on steel inside, and leave the roofline as it is.

Party wall and building control in SE6

Because the stack usually sits in the shared party wall, removing the breast or bearing new steel into that wall is notifiable under the Party Wall Act, so you serve notice on your neighbour as building owner before work begins, using the drawings we give you. Leaving a stack unsupported is never an option, so the support design is settled and agreed on paper first.

The structural support is notifiable under the Building Regulations, and Lewisham Council's building control inspects and signs it off. We manage the whole sequence: coordinating the engineer's calculations, safe staged demolition with propping, capping any redundant flue with a vent to stop damp, and replastering so the room looks like the breast was never there.

Earlier removals we uncover in SE6

A fair number of Catford terraces have already had a breast taken out at some point, and not always properly. The tell-tale signs are a hairline crack running diagonally from the corner of the old opening, a bedroom floor that dips towards the party wall, and brackets that were bolted through soft Edwardian brick with no spreader plate. Sometimes there is nothing holding the stack at all beyond the plaster around it, which only became apparent when someone opened the ceiling.

If we find that on your survey, we tell you and the engineer designs a proper remedy, usually a beam bearing onto new padstones each side. It is worth putting right rather than living with, because a solicitor acting for a buyer will ask for a completion certificate that does not exist. Regularisation through Lewisham building control is possible after the event, and we arrange the drawings and open up the work so an inspector can see what is there.

Doing this before the rewire, not after

Order matters more than most people expect. If a rewire, a full replaster or new flooring is anywhere in your plans for the room, the breast wants taking out first. We have walked into Catford houses where an electrician chased new circuits into a wall that was about to be demolished, and into others where an oak floor laid in the spring had to be lifted again in the autumn to trim joists and level the ground where the old hearth had been sitting.

So we ask at survey what else is coming, not just what you have called us about. If the room is being replastered anyway, the making good disappears into that trade and one plasterer visits once. If the house is being rewired, the sparks can set the new socket and radiator positions on a wall that is already flat. Flooring goes last, every time. On an SE6 terrace where several rooms are being done in turn, that sequencing usually saves more than it costs to plan.

• Roof tiling, flashing and leadwork made good
• Skirting, cornice and picture rail matched back in
• Structural engineer's calculations arranged and followed

VOA Council Tax stock of properties, March 2025, for Catford East & Mountsfield Park and Catford Bridge. Counts rounded by the VOA.

Before committing to chimney breast removal in Catford, it is worth looking at home renovation in Catford, chimney breast removal across Lewisham, builders across London, party walls and chimney breasts, chimney breast removal anywhere in London and Cracks in Walls: When to Worry.

Why Catford Homeowners Choose GS Renovation

Catford homeowners choose GS Renovation because we treat chimney breast removal as the structural job it is, not a quick knock-out. You get an engineer-designed support solution and building control handled end to end, tidy working in a lived-in home, and a finish signed off by building control, backed by our founder's 30+ years on the tools.

Reviewed jobs near Catford

1 MyBuilder review from Crofton Park, with each customer's own job title:

• Replace small section of wooden worktop, sink, tap and gas hob, Crofton Park, 17 Apr 2024 (5 out of 5)

Read all 31 on our reviews page.

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.