What will removing a chimney cost?
Taking out a redundant chimney frees up floor space and ends the damp and repointing bills — but it's a structural job, not a knock-about. Pick what you're removing — a breast in one room, the full stack, or just the bit above the roof — the floors affected and your region, and we give you an indicative UK price range with scaffolding, structural support and making-good broken out. Free, no sign-up.
A guide, not a quote. The ranges are typical 2025/26 UK all-in prices — the demolition, removing the rubble, supporting what stays up, capping the flue, and the listed making-good trades, inclusive of VAT — drawn from published industry averages. They exclude asbestos in old flue liners or render, a shared party-wall stack needing a Party Wall agreement with the neighbour, and unusually tall or inaccessible stacks. The only real number is a measured, written quote from a builder, plus a structural engineer's design where the breast is removed. Nothing you type leaves your browser.
It's the support and the making-good, not the knocking down, that costs.
What you remove sets the base. Capping and ventilating a flue in place is cheap — you keep the chimney but stop it leaking and let it breathe. Taking out just the stack above the roof ends the repointing and flashing bills and is mostly a roofing job. Removing the internal breast frees up floor space in the rooms. Removing the whole chimney — stack and breast, roof to ground — is the biggest job and the cleanest result.
Floors multiply it. A breast usually runs from the ground floor up through one or two bedrooms and into the loft. Every floor it passes through is more masonry to take down and bag up, and another room to re-plaster and redecorate — so a two- or three-storey removal costs proportionally more than a single room.
Support is the part people miss. If you remove a breast lower down but leave the stack above it, that stack has to be carried — on galvanised gallows brackets bolted to the party wall, or a steel beam. That's a structural alteration: it needs a structural engineer's calculations and building-control sign-off. Skipping it is dangerous and will haunt you at sale. Removing the whole chimney avoids the support problem but adds roofing and scaffolding.
The trades after the demolition. Once the masonry is out you need the roof made watertight where the stack was, the floors and walls patched, and the rooms re-plastered and decorated. Those making-good trades are often more than the demolition itself, which is why the "extras" here matter — a quote that omits them isn't a real quote.
Get three quotes — and check for asbestos and party walls. Get three written quotes that include support, building control, roofing and making-good. If you share the stack with a neighbour (common on terraces and semis), you'll likely need a Party Wall agreement. Old flue liners and renders can contain asbestos, so a check is wise before work starts. A budget worked out in advance is your strongest negotiating position.
Keep your chimney project in one place.
Stead's home improvements log tracks the budget against what you actually spend, holds the structural engineer's design and the building-control completion certificate, and keeps the paperwork you'll want at sale time — all alongside the rest of your home's record.