Written by Andrew, Lead Roofer
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Public Liability Insured
Emergency Roof Repairs 24/7
Chimney repairs cost £150 to £3,000+ in the UK. Covers repointing, flashing, flaunching, pot replacement, rebuilds, and removal with London pricing.
Chimney repairs in the UK cost between £150 and £3,000 in 2026, depending on the type of chimney repair, the condition of the chimney stack, and whether scaffolding is required to reach the chimney safely. Chimney repointing costs £400 to £1,200. Chimney flashing replacement costs £400 to £1,500. A full chimney stack rebuild above the roofline costs £1,000 to £3,500 or more.
This guide covers chimney repair costs across the UK in 2026, breaks down pricing by repair type and property type, explains what drives chimney repair costs up, and covers when chimney removal makes more sense than chimney repair. All figures include London and South East adjustments, because chimney repair costs in the capital run 15 to 25 per cent higher than national averages due to scaffolding costs, access restrictions, and higher labour rates.
Chimney repair costs depend on the specific repair needed, the height and accessibility of the chimney, and whether the chimney is on a period property that requires lime mortar rather than cement. Most chimney repairs fall between £150 and £1,500. Full chimney stack rebuilds and chimney removals push costs above £2,000.
| Chimney repair type | Typical cost |
|---|---|
| Chimney repointing | £400-£1,200 |
| Chimney flashing repair or replacement | £400-£1,500 |
| Chimney flaunching repair | £150-£400 |
| Chimney pot replacement | £100-£300 |
| Chimney cowl fitting | £80-£200 |
| Chimney stack partial rebuild | £600-£1,500 |
| Chimney stack full rebuild (above roofline) | £1,000-£3,500 |
| Chimney stack removal (above roofline) | £800-£1,500 |
Scaffolding adds £500 to £1,200 to any chimney repair. Almost all chimney work above bungalow height requires scaffolding for safe access, and scaffolding is often the single largest line item on a chimney repair quote.
Chimney repointing is the most common chimney repair. Chimney repointing involves raking out deteriorated mortar from the joints between bricks and replacing the mortar with a fresh mix. Chimney stacks are more exposed to wind and rain than any other part of a building, and chimney mortar deteriorates faster than mortar on sheltered walls because of that constant exposure. A chimney stack that needs repointing on a Victorian terrace in London has often been standing in the weather for over a hundred years.
| Chimney repointing type | Cost |
|---|---|
| Chimney repointing (cement mortar, bungalow) | £400-£700 |
| Chimney repointing (cement mortar, two-storey house) | £600-£900 |
| Chimney repointing (lime mortar, period property) | £700-£1,200 |
| Chimney repointing (mid-roof chimney, difficult access) | £900-£1,200+ |
The repointing cost guide covers repointing in detail, including why lime mortar matters for properties built before 1919. The same principle applies to chimney stacks: using cement mortar on a chimney built with lime mortar traps moisture inside the brickwork and causes spalling, where the brick faces flake and crumble. Chimney stacks on Victorian and Edwardian properties should always be repointed with NHL 3.5 or NHL 5 lime mortar.
Chimney flashing repair is the second most common chimney repair. Lead flashing seals the joint between the chimney stack and the roof covering, and chimney flashing failure is one of the most frequent causes of roof leaks on older properties. The chimney flashing guide explains how chimney flashing works and what chimney flashing failure looks like. Chimney flashing repair costs depend on whether the existing lead can be re-pointed and re-dressed or whether full replacement is needed.
| Chimney flashing repair type | Cost |
|---|---|
| Repointing existing chimney flashing | £150-£350 |
| Replacing chimney flashing (one side) | £400-£800 |
| Full chimney re-flash (stepped, apron, and back gutter) | £800-£1,500 |
Chimney flaunching repair addresses the mortar cap at the top of the chimney stack. Flaunching is the sloped mortar bed that holds chimney pots in place and sheds rainwater away from the chimney opening. Cracked or missing flaunching allows water to pool at the top of the chimney stack and seep into the brickwork below. Chimney flaunching repair is a relatively quick job and costs £150 to £400, though scaffolding to reach the chimney often costs more than the flaunching repair itself.
Chimney pot replacement costs £100 to £300 per pot, including fitting. Chimney pots crack from frost damage or from movement in the flaunching beneath them. Matching original chimney pots on period properties can be more expensive than fitting new standard pots because original Victorian chimney pots are no longer manufactured and reclaimed pots command a premium.
Chimney cowl fitting costs £80 to £200 per cowl. A chimney cowl sits on top of the chimney pot or flue opening and prevents rain, birds, and debris from entering the flue. Fitting a cowl to an unused chimney is one of the cheapest forms of chimney maintenance because a cowl prevents moisture problems that lead to far more expensive chimney repairs over time.
Chimney stack rebuilds are necessary when the brickwork has deteriorated beyond what repointing can fix. A partial chimney rebuild, replacing the top few courses of brickwork and re-setting the flaunching and pots, costs £600 to £1,500. A full chimney stack rebuild above the roofline costs £1,000 to £3,500 depending on the chimney height, the number of flues, and the brickwork required to match the existing building.
London and South East chimney repair costs run 15 to 25 per cent above national averages. The London chimney repair premium reflects higher scaffolding costs, more expensive skip hire, parking and access restrictions in residential streets, and higher roofer day rates.
| Property type | Minor chimney repair | Medium chimney repair | Major chimney repair |
|---|---|---|---|
| Victorian terrace (3+ storeys) | £250-£500 | £700-£1,500 | £1,500-£3,500 |
| Edwardian semi (2 storeys) | £200-£450 | £600-£1,300 | £1,200-£3,000 |
| 1930s semi-detached | £180-£400 | £500-£1,100 | £1,000-£2,500 |
| Detached house | £200-£450 | £600-£1,200 | £1,200-£3,000 |
| Bungalow | £150-£300 | £400-£800 | £800-£2,000 |
Victorian terrace chimney repairs are the most expensive because Victorian terraces often have tall chimney stacks, mid-terrace properties have restricted access from both sides, and original Victorian brickwork requires lime mortar and sometimes reclaimed bricks to match. Bungalow chimney repairs are the cheapest because bungalow chimneys can often be reached from a ladder without scaffolding.
Chimney position also affects chimney repair costs. A chimney on the gable end of a house is easier and cheaper to scaffold than a chimney in the middle of the roof, because a mid-roof chimney requires a longer scaffold run and more complex access for the roofer. You can see this on almost any street of terraced houses in Battersea or Fulham, where mid-terrace chimney stacks sit well back from the eaves and need full roof access to reach.
Scaffolding is the biggest single variable in chimney repair costs. Chimney scaffolding for a standard two-storey house costs £500 to £800. Chimney scaffolding for a three-storey Victorian terrace costs £800 to £1,200. Chimney scaffold hire charges typically run £25 to £50 per week on top of the erection and dismantling cost, so chimney repairs that take longer than expected incur additional scaffold hire costs.
Chimney height and accessibility affect chimney repair labour costs directly. Taller chimney stacks take longer to repair because materials need to be carried up to the chimney, and working at the top of a tall chimney stack requires more care and slower progress. A chimney stack on a bungalow is a half-day job. The same chimney repair on a three-storey terrace is a full day or more because of the time spent getting materials and equipment to the chimney.
Mortar type affects chimney repair costs by 20 to 30 per cent. Lime mortar chimney repointing costs more than cement mortar chimney repointing because lime mortar materials cost more and lime mortar application requires specialist skills. Properties built before 1919 should always use lime mortar for chimney repointing. Properties built after 1930 can use cement mortar for chimney repointing. The repointing cost guide explains lime mortar vs cement mortar in detail.
London roofer day rates for chimney work average £250 to £350 per day, compared to £180 to £250 in the Midlands and £150 to £220 in the North.
Crumbling or missing mortar between chimney bricks is the clearest sign a chimney needs repointing. Mortar that crumbles when scratched with a fingernail has deteriorated beyond the point of protection. Chimney mortar in London deteriorates faster than mortar on sheltered walls because chimney stacks are fully exposed to wind-driven rain from every direction.
Cracked or displaced flaunching at the top of the chimney stack allows water into the chimney and can cause chimney pots to become loose. Loose chimney pots are a safety risk in high winds because a falling chimney pot from a three-storey terrace can cause serious injury or damage to vehicles and pedestrians below.
Dark staining on chimney brickwork indicates water is penetrating the chimney stack. White powdery deposits on chimney bricks, called efflorescence, indicate that moisture is being drawn through the brick and evaporating at the face. Both are signs that chimney repointing or chimney flashing repair is needed.
Damp patches on internal walls around the chimney breast, particularly after rain, are a reliable indicator of chimney flashing failure or chimney stack repointing failure. Catching chimney problems early keeps chimney repair costs lower because the damage stays localised rather than spreading into the roof structure, ceiling plaster, and internal decoration.
Not every chimney problem requires chimney repair. Where a chimney is no longer in use and the chimney stack is in poor condition, chimney removal above the roofline can be more cost-effective than repeated chimney repairs over several years.
Chimney stack removal above the roofline costs £800 to £1,500. Chimney stack removal involves taking down the brickwork above the roof, weatherproofing the opening, and re-tiling around the area where the chimney sat. Chimney stack removal eliminates future chimney repointing, chimney flashing, and chimney flaunching costs entirely.
Chimney breast removal is a different job. Chimney breast removal involves taking out the chimney structure inside the house, which is interior structural work rather than roofing work. Chimney breast removal typically costs £1,500 to £4,000 and requires a structural engineer and building regulations approval because the chimney breast may be supporting the structure above.
The decision between chimney repair and chimney removal depends on whether the chimney is still in use. A chimney connected to an active fireplace, wood burner, or gas fire must be maintained and cannot be removed without alternative venting. A chimney that serves no purpose and costs £500 to £800 in repair work every few years is a candidate for removal.
Most routine chimney repairs do not require building regulations approval. Chimney repointing, chimney flashing repair, chimney flaunching repair, and chimney pot replacement are all maintenance work that does not trigger building regulations.
Building regulations apply to chimney work when the work involves structural alterations. Rebuilding a chimney stack, removing a chimney stack, installing a new flue liner, and fitting a new stove or fireplace all require building regulations approval or sign-off from a competent person scheme such as HETAS for solid fuel appliances.
The Planning Portal provides guidance on planning permission and building regulations for chimney and flue work. Chimney work in conservation areas or on listed buildings may require additional planning consent. Speaking to the local Building Control team before starting chimney structural work or chimney removal avoids compliance problems after the work is completed.
Chimney repair work often uncovers related problems. Chimney repointing sometimes reveals that the roof tiles around the chimney base need replacing. Chimney flashing replacement sometimes shows that the chimney stack brickwork needs repointing. Combining chimney repairs with related roof work saves money because scaffolding only needs to be erected once.
The roof repair cost guide covers general roof repair pricing, including tile replacement and ridge tile re-bedding that is often done alongside chimney work. Bernard Andrews provides chimney maintenance services across London and the South East, including chimney repointing, chimney flashing replacement, chimney pot replacement, flaunching repair, and chimney stack rebuilds.
Chimney repointing costs £400 to £1,200 in the UK in 2026. Chimney repointing costs for a bungalow with easy access start at £400. Chimney repointing costs for a two-storey house with scaffolding typically cost £600 to £900. Lime mortar chimney repointing on period properties costs £700 to £1,200 because lime mortar materials cost more and lime mortar application takes longer than cement mortar.
Home insurance typically covers chimney damage caused by a sudden event such as storm damage, lightning strike, or impact from a falling tree. Home insurance does not cover chimney damage caused by gradual deterioration, weathering, or lack of maintenance. The distinction insurers apply is whether the chimney damage was sudden and unforeseen. Mortar erosion over decades is not covered. A chimney stack damaged by a storm is almost certainly covered.
Chimney removal above the roofline costs £800 to £1,500 as a one-off expense. Chimney repair costs accumulate over time: repointing every 20 to 30 years, flashing replacement every 25 to 40 years, and flaunching repair every 15 to 25 years. For a chimney no longer in use, chimney removal eliminates all future chimney maintenance costs. For a chimney connected to an active fireplace or stove, chimney repair is the only option because the chimney must remain functional.
Chimney repointing without scaffolding is possible on bungalows and some single-storey extensions where the chimney is low enough to reach from a roof ladder. Chimney repointing on two-storey and three-storey properties requires scaffolding for safe access. Health and safety regulations require safe working platforms for work at height, and a professional roofer will not repoint a chimney from an unsecured ladder on a two-storey house.
Chimney repointing is typically needed every 20 to 30 years, depending on the mortar type, the chimney’s exposure to weather, and the quality of previous chimney repointing work. Cement mortar chimney repointing lasts 20 to 30 years on most properties. Lime mortar chimney repointing can last longer on sheltered chimney stacks but may need attention sooner on fully exposed chimney stacks. Annual visual inspection of chimney mortar helps catch chimney repointing needs early.
Planning permission is not normally required for chimney stack removal on standard residential properties. Chimney stack removal is usually treated as permitted development. Planning permission may be required for chimney removal on listed buildings, in conservation areas, or where the chimney removal would significantly alter the building’s appearance. Building regulations approval is required for chimney stack removal because chimney removal involves structural alteration.
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