A chimney is a small structure with a large effect on the bill. The work itself may take a day, but the stack stands on the ridge or a party wall, so reaching it often costs as much as repairing it. Add the choice between stone and brick, the state of the mortar and the lead round the base, and two chimneys that look alike from the pavement can be priced very differently. This guide gathers national figures from consumer cost guides for repointing, flashing repairs and rebuilds, shows how scaffold changes the total, and explains what a survey should tell you before anyone names a figure. Being national, they let you test whether a quote is sensible and cannot predict one. The price you sign up to comes from a visit to your own roof.
Typical UK prices for common chimney jobs
Cost guides group chimney work into a handful of jobs. MyBuilder's chimney repair cost guide (2026) supplies most of the typical UK figures in this table, and MyJobQuote's leadwork guide (September 2026) supplies the lead patch.
| Job | Typical UK range |
|---|---|
| General chimney repair | £500 to £2,000 |
| Repointing the joints of a stack | about £750 on average, with individual jobs between £500 and £2,000 |
| Flashing repair | £250 to £1,200 |
| Lead patch at a chimney | £150 to £250 |
| Taking a stack down and rebuilding it | £2,000 to £10,000 and upwards |
Your fixed quote follows the survey. Each row spans a wide range because the guides lump together very different stacks. A low-level brick stack on a bungalow and a tall stone stack on a three-storey Bath terrace both count as one chimney, and they do not cost the same to reach or to repair.
The top of the table is also not a ladder to climb. Repointing, flashing and flaunching are separate repairs for separate faults, and many chimneys need only one of them. Paying for a rebuild when the stack needed its joints raking out and refilling is the expensive mistake. Paying for repointing when the real fault was the lead at the base is the repeat-visit mistake, because the stain on the breast returns the first time it rains hard from the same quarter.
What scaffold adds to a chimney job
Access is the line that most often surprises owners. In MyBuilder's chimney repair guide (2026) a simple patch costs about £250 with no scaffold, and rises to between £550 and £650 when scaffold is needed, so a small job can be mostly access. MyJobQuote's leadwork guide (September 2026) shows the same pattern for flashings: a full replacement averages about £570, split between £350 to £460 for a house needing no scaffold and £700 to £920 for one that does.
The reason is simple. A chimney stack usually stands on the ridge or the party wall, well above the eaves, and a roof ladder is not a safe working platform for lifting stone, mixing mortar and dressing lead. The work needs a proper platform round the stack. On a house with a shared wall, a basement area or a narrow pavement, the scaffold may also need a licence from the council for the highway, which adds time.
There are two ways to keep the cost down. The first is to do all the chimney work in one visit, so the scaffold is paid for once and the stack is pointed, capped and flashed under a single set-up, which also means one disturbance for anyone living in the rooms below. If the pointing, the flaunching and the flashing all need attention, bring them together. The second is to share scaffold with other roof work. Where a re-roof or roof repair is already booked, the stack is already in reach. Our page on chimney scaffolding goes through when it is needed and when a tower or a roof access system will do.
When you compare quotes, ask whether scaffold is included and how long it stays up. A low price that leaves scaffold out is not low.
Repointing and flaunching: the repairs most stacks need
The top of a stack takes the worst weather. Rain, wind and frost hit it from every side, and the mortar joints and the flaunching, a sloping mortar cap round the pots that sheds rain, wear first. Per MyBuilder's 2026 chimney repair guide, repointing averages near £750, and individual jobs across the country run between £500 and £2,000. That sits within the same band as a general chimney repair, so a stack that needs repointing and a new flaunching is often priced as a single job.
What moves the figure inside that band is mostly height and material. A stack with more courses has more joints. A stone stack is slower than brick because each stone is different and the mortar has to be matched. On older Bath houses the mortar is usually lime, which is slower to work and is the right material for soft stone. Our guide to lime repointing on Bath stone stacks explains why.
Repointing does not have to cover the whole stack. A guide from the New Forest National Park Authority advises repointing just the sections where mortar has gone or eroded badly, and notes that old pointing is often still sound after a very long time. A good survey separates the joints that need work from the ones that do not, and the quote should say which is which. Lifespan is condition-led too. HomeBuilding's repointing guide (2022) says a chimney typically needs repair every 30 to 50 years, which is a rule of thumb and not a schedule.
Cracked flaunching is cheap to renew while the pots are sound and expensive to ignore, because water that gets under the cap soaks the top courses and the flues. We cover the detail on our chimney flaunching page.
Flashings, soakers and leadwork at the base
The base of a stack is where the roof covering meets masonry, and it is sealed with lead. The flashing is lead dressed over that joint and stepped up the sides of the stack. Soakers are lead sheets, each slipped beneath a slate or tile, returning the water to the slope. At the back, above the stack, a back gutter turns the water that runs down the slope round the chimney.
Typical UK figures for this work: MyBuilder (2026) reports flashing repairs of £250 to £1,200, while MyJobQuote (September 2026) reports lead patches of £150 to £250 and replacement averaging about £570. The wide band for flashing repairs reflects the number of sides involved and how much of the surrounding covering has to be lifted to reach the soakers.
Properly laid lead has a long life. MyJobQuote's guide says correctly installed chimney flashing typically lasts over 80 years, and over 100 years in the higher codes, though exposure and workmanship move that. Royston Lead's brochure lists code 4 or code 5 for flashings, in pieces no longer than 1500 mm, and Leadworx gives those codes as 1.80 mm and 2.24 mm thick. That long life is a reason to repair rather than strip lead that is still sound. Cement fillets and mastic smeared along a joint are the quick fixes that fail, and they often hide a leak that carries on behind them.
If you have a brown stain on the chimney breast inside, the lead is a prime suspect. Our guide to a leaking chimney helps trace which part is at fault before you pay for any of it.
When a stack needs rebuilding
Rebuilding is the largest job on the page and has the widest range, with typical UK figures of £2,000 to £10,000 and upwards, according to MyBuilder's chimney repair guide (2026). The top of that range is not unusual for tall or complicated stacks. Rebuilding means taking the stack down to sound masonry and relaying it, usually reusing the original stone or brick, then fitting new flaunching, pots and lead.
Stacks are rebuilt when repair would only delay the problem. A stack that leans, shows wide cracks, has loose or spalled stones through its depth, or has joints that fail as fast as they are mended, is better rebuilt. A stack with a few eroded joints is not. The cost difference between the two is large enough that the diagnosis is worth getting right.
Brick stacks and stone stacks rebuild differently. Brick can often be taken down and relaid with the same bricks if they are sound. Bath stone needs more care, because blocks are cut to fit and weather in different ways, and any that have decayed must be replaced with stone of the right type and tone. Our page on brick chimney repair covers where brick can be repaired and where it cannot.
Listed buildings add a step. Taking down and rebuilding a stack on a listed house needs consent from B&NES Council under the listed building rules, and that takes time before work can start. Allow for it in your planning as well as your budget, and ask B&NES planning early what they will want to see with the application, because a stack that is a prominent part of a roofline attracts closer attention than one tucked behind a parapet.
What a survey should tell you before you agree a price
A national range tells you whether a quote is plausible. A survey tells you what to do. MyBuilder (2026) puts a standard roof inspection at £150 to £250 in typical UK figures, and all inspection types between £150 and £500. Our own survey is free, with photographs of your stack as it stands.
A useful chimney survey answers five questions. Where is water getting in: the top, the joints or the base? How much of the mortar has failed and how much is sound? Is the lead intact, and are the soakers still doing their job? Is the stack stable, with no lean or cracking through the masonry? And what does the access need? Each answer maps to a part of the price.
After the visit you receive a fixed, written price. It should list the parts being repaired, the materials, whether scaffold is included, how waste will be dealt with and what is left alone. Where repair works, we repair. If a rebuild is the right answer, we explain the cause and show you the evidence. A written 10-year guarantee covers our workmanship.
In Bath, check whether the house is listed before you book anything. A listed stack needs consent for anything beyond repairing like for like, and the B&NES listed buildings page sets out what to ask the council. Our chimney repairs service page lists the jobs we cover.