How Much Does a Chimney Rebuild Cost in the UK?
A full rebuild of one ordinary chimney stack above the roof is usually £2,500–£6,000 in 2026, including scaffold, new pots, flaunching and lead flashings. That's a builder's figure for the whole job, from someone who prices this work and doesn't quote for it. Repointing a sound stack costs far less, and a tall stack or one rebuilt down through the roof costs more, so the first thing to settle is which of those you're actually looking at.
If you're here because of a survey, your surveyor has done their part: they've told you the stack needs attention and how urgently. This page puts a price on each version of the job so you can tell a £900 repair from a £6,000 rebuild before you talk to the seller.
What each chimney job costs
| Job | Typical 2026 cost | What it covers |
|---|---|---|
| Repointing a sound stack | £400 – £900 | Raking out and repointing the joints. Add scaffold if nothing else is paying for it |
| Flaunching renewal | £250 – £500 | The mortar cap the pots sit in. Usually done with the repointing |
| Lead flashing replacement | £350 – £700 | Apron, soakers and back gutter on one stack. A worse state or awkward access can take it towards £1,200 |
| Repointing and new flashings together, scaffold included | £900 – £3,500 | The usual answer to damp on the chimney breast upstairs |
| Partial rebuild, top few courses | £600 – £1,000 | The brickwork only. Access is on top |
| Full rebuild above the roof, one ordinary stack | £2,500 – £6,000 | Scaffold, take down to the roofline, rebuild, new pots, flaunching and flashings. The figure to use |
| Tall or ornate stack, or a rebuild down through the roof | £6,000 – £10,000+ | Large stacks, listed or decorative brickwork, or a stack that has failed below the roofline |
| Scaffold or tower for one stack (typical terrace) | £400 – £900 | Often the biggest single line on the bill |
These are the same ranges used across this site, in the chimney stack and flashing guide, the chimney cracks and leaning chimney guide and the RICS survey repair cost calculator. This page doesn't replace them. It says which figure belongs to which job.
Why you'll see different figures for the same job
Chimney prices look inconsistent wherever you read them, on this site as much as anywhere else, because they describe different slices of the work:
- £400–£900 is repointing a stack that is structurally fine. It is often quoted as if the scaffold is already up for other roof work.
- £600–£1,000 for a partial rebuild, and the £1,000–£3,500 some cost guides give for rebuilding above the roofline, are mostly the brickwork. Before you compare one of these with a full quote, check whether scaffold, pots and lead are in it.
- £2,500–£6,000 is the whole job for one ordinary stack: scaffold up, stack taken down to the roofline, rebuilt, new pots, new flaunching and new lead.
- £6,000–£10,000 or more is a tall or ornate stack, a listed building, or a rebuild that has to go down through the roof.
When you compare quotes, compare the same scope. A cheap rebuild price that leaves out the scaffold or the lead isn't cheap.
Where the house is, and how many stacks
The figures above are UK averages. The cost calculators on this site adjust for region with the same factors throughout: London about 1.25×, the South East about 1.12×, the Midlands about 0.97×, the North of England and Wales about 0.92×. In London, a full rebuild of one ordinary stack is more like £3,100–£7,500.
Two stacks on the same roof share one scaffold, so the second costs noticeably less than the first. The same goes for doing the chimney while the roof is being re-covered: pay for the scaffold once.
Repoint or rebuild?
- Repoint when the bricks are sound and only the joints are tired. Open joints and a cracked flaunching let rain in, and the damp shows up on the chimney breast below. That is a repoint and reflaunch, not a new stack.
- Replace the lead when the flashings are split, lifted or were done in mortar fillet. A failing stack, very often the lead, is the most common single source of the upstairs damp a survey picks up, and it's a flashings job, not a foundations job.
- Rebuild when the stack leans, the pots are loose, bricks have lost their faces, or the joints have failed right through. The chimney cracks and leaning chimney guide covers how to tell, including the 1mm-in-100mm rule of thumb.
- Chimney breasts removed below is a different problem. Ask for the building regulations paperwork and the engineer's calculations before anyone prices brickwork. Don't price it as repointing.
Don't rebuild a stack that only needs lead.
Taking the stack down instead
If you don't use the flue and the breast below is staying, properly supported, taking the stack down below the roofline and closing the roof over is sometimes cheaper than a rebuild. It still needs scaffold, and it's a different job from a rebuild, so get it priced as that. In a conservation area check with the council first, and if the stack is shared with next door, don't remove it without your neighbour: it may need a party wall agreement. The party wall checker goes through the steps.
If it's on your survey
The surveyor's wording tells you which row of the table you're in:
- "Repointing required", "flashings defective" or damp staining to the breast: the £900–£3,500 repointing-and-lead row, and best done with any other roof work.
- "Chimney stack requires rebuilding": the £2,500–£6,000 row. Ask whoever quotes to write the scope down so you know scaffold, pots and lead are included.
- "Leaning", "out of vertical" or "further inspection before exchange": get it looked at before you price anything. The answer might be a repoint, or it might be the top row.
If the chimney is one of several findings, the RICS survey repair cost calculator prices the roof with the chimney added on, and what to do with "further investigation recommended" helps you decide what to check before exchange.
Frequently asked questions
How much does a chimney rebuild cost in the UK?
For one ordinary brick stack rebuilt above the roof, usually £2,500–£6,000 in 2026, including scaffold, new pots, flaunching and lead flashings. That's a builder's figure for the whole job. A tall or ornate stack, or one rebuilt down through the roof, is £6,000–£10,000 or more.
Why are chimney rebuild prices so different?
They describe different slices of the same job. Repointing a sound stack is £400–£900, often quoted with the scaffold already up. £600–£1,000 for a partial rebuild, and around £1,000–£3,500 for rebuilding above the roofline, are mostly the brickwork. £2,500–£6,000 is the whole job with scaffold, pots and lead. Compare quotes on the same scope.
Should I repoint or rebuild my chimney?
Repoint when the bricks are sound and the joints are tired. Rebuild when the stack leans, the pots are loose, bricks have lost their faces or the joints have failed right through. Damp on the chimney breast is often just the lead or the flaunching, which is a £900–£3,500 job with scaffold, not a rebuild.
Is a leaning chimney dangerous?
It can be. A slight, long-standing lean is common on old stacks, but BRE guidance treats a chimney leaning more than about 1mm in every 100mm of height as unsafe, though that may be cautious for some historic stacks. Loose bricks, loose pots or a lean that is getting worse need a proper look soon, not a cosmetic repoint.
Is it cheaper to take a chimney stack down than rebuild it?
Sometimes, if you don't use the flue and the breast below is staying and properly supported. It still needs scaffold and it's a different job from a rebuild, so get it priced as that. Check with the council in a conservation area, and don't remove a shared stack without your neighbour's agreement.
Work it out yourself
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