Chimney breast removal: is it worth it, and what permission you need
What taking out a chimney breast costs in 2026 with every fee counted, the approval and party wall notice it needs, steel beam or gallows brackets, and when it is worth doing.
Removing a chimney breast costs £1,500 to £2,500 for one floor in the UK in 2026, before the structural engineer, building control and any party wall surveyor are paid. In England it always needs building regulations approval, because the breast is part of the building's structure. We cover when it is worth doing, the permissions, steel beams against gallows brackets, the full cost and how the job runs.
Is removing a chimney breast worth it?
Taking out a chimney breast turns a wall with a projection and two alcoves into one flat wall. That is often the difference between a run of kitchen units, a wardrobe or a bed fitting and not fitting. Against that, you lose the fireplace, and a one-floor job costs £2,350 to £4,350 once the steel, engineer, building control and redecorating are counted.
It is worth doing when:
- The room is short of one wall. A kitchen that needs a continuous run of units, a bedroom that needs a wardrobe, or a bathroom where the bath will not fit past the breast.
- The fireplace is out of use for good. No open fire, no stove planned, and any gas fire already disconnected or ready to be.
- Other building work is planned. Taking the breast out alongside structural work early in a renovation means the dust, the plastering and the redecorating happen once.
- You will keep the paperwork. The engineer's calculations and the completion certificate go in the house file, ready for the day you sell.
It is the wrong job when:
- You want a fire later. The breast carries the flue, so taking it out ends any plan for an open fire or a stove on that wall.
- A neighbour's flue crosses through it. Where flues from next door cross over inside the breast, it cannot come out.
- The builder's quote is the whole budget. The steel, engineer, building control and a party wall surveyor can take a £1,500 quote past £3,000.
Do you need permission to remove a chimney breast?
Three sets of rules can apply: building regulations, planning, and the Party Wall Act where the breast sits on a shared wall. In England, every job needs the first, many need the third, and few need the second.
Building regulations approval
In England, building regulations approval always applies to chimney breast removal, because the breast is part of the building's structure. That holds whether it comes out on the ground floor, the first floor or both. A structural engineer designs the support for the masonry left above and provides the drawings and calculations for the application.
There are two routes to building regulations approval. A full plans application is decided within 5 weeks, or 2 months if you agree to more time. A building notice lets work start 2 days after it is submitted, with the inspector checking on site. Some councils expect full plans for this job, so ask before choosing.
At the end, building control issues a completion certificate, usually within 8 weeks of completion on a full plans application. Keep it with the deeds. Without it, you have no proof the work was approved when you come to sell.
Planning permission, listed buildings and conservation areas
Taking out an internal chimney breast needs no planning permission in England, because the outside of the house does not change. Taking the stack off the roof is different, and in a conservation area it can need permission. A listed building needs listed building consent for any major change, so ask the council before touching a chimney in a listed house.
Party wall notice
In a terrace or a semi, the chimney breast often backs onto the party wall you share with next door. Removing it is work to a party structure, so in England and Wales you serve a party wall notice on the neighbour at least 2 months before work starts. The notice stays valid for a year.
The neighbour has 14 days to reply. If they consent in writing, no surveyor is needed. If they dissent or say nothing, a party wall surveyor draws up an award, at £700 to £1,500 per neighbour, and you usually pay their surveyor as well as your own. Start without notice and the neighbour can seek an injunction to stop the work.
Steel beam or gallows brackets
Once the breast comes out, the masonry above it still needs holding up. Take out the ground-floor breast and that can mean the first-floor breast and the whole stack. The engineer specifies one of two supports.
| Support | What it is | Time on site | London total, one floor | Building control view |
|---|---|---|---|---|
| Steel beam | A steel beam under the remaining masonry, bearing on the walls or on posts | 3 – 5 days | £3,200 – £5,700 | Accepted as standard |
| Gallows brackets | Steel brackets fixed into the wall below the remaining breast | 1 – 2 days | £1,750 – £2,900 | Accepted by some councils, with conditions; rarely in London |
Most London building control bodies now expect a steel beam and query or reject gallows bracket designs. Branded support brackets get the same treatment. Councils that still accept brackets can ask for pull-out test results on the fixings.
Whichever support goes in, the council can ask for 30 minutes' fire protection around it unless it sits in the roof space. Corbelling, where the brickwork is stepped out to carry the breast above, is not a safe substitute: the new bricks cannot bond to the old strongly enough.
Beams for a chimney breast typically run from 152 x 89 UB16 to 203 x 133 UB25, with terraces at the heavier end. The steel itself costs £150 to £350. Fitting it, propping the masonry and making good cost far more.
How much does chimney breast removal cost?
These are 2026 prices for the removal itself, covering labour, waste removal and basic making good. Scaffold, the structural support and building control are extra and listed below.
| Job | UK | London | Time on site |
|---|---|---|---|
| Chimney stack only, down to the roofline | £800 – £1,800 | £1,000 – £2,500 | 1 – 2 days |
| Chimney breast, one floor | £1,500 – £2,500 | £2,000 – £3,000 | 2 – 5 days |
| Chimney breast, two floors | £2,500 – £4,500 | £3,000 – £5,000 | 2 – 5 days per floor |
| Full removal, stack and breasts | £3,000 – £6,000 | £4,000 – £6,500+ | About 1 week |
A full removal takes the breasts out on every floor and the stack off the roof, so it carries the most labour and needs a scaffold. Removing only the ground-floor breast is the cheapest breast job, but the breast and stack above then need a beam or brackets to sit on.
Fees and extras on top
| Item | Cost | When it applies |
|---|---|---|
| Structural engineer's calculations | £350 – £700 | Every breast removal |
| Building control | £200 – £400 | Every breast and full removal |
| Party wall surveyor | £700 – £1,500 per neighbour | Breasts and stacks on a shared wall |
| Scaffold to reach the stack | £400 – £900 | Most stack and full removals |
| Reinstating the roof covering | £300 – £800 | After a stack comes down |
| Making good and redecorating | £150 – £400 | Breast and full removals |
| Skip or grab lorry | £200 – £400 | Priced separately by some builders, more for a full removal |
Labour is the part that moves with the postcode. London builders charge £2,000 to £3,000 for a one-floor breast removal against £1,500 to £2,500 across the UK, and a full removal there reaches £6,500 or more. An itemised London job, from the engineer to building control, looks like this:
| Job | Engineer | Builder and making good | Building control | Total |
|---|---|---|---|---|
| One floor, steel beam | £450 – £700 | £2,500 – £4,500 | £250 – £500 | £3,200 – £5,700 |
| One floor, gallows brackets | £350 – £500 | £1,200 – £2,000 | £200 – £400 | £1,750 – £2,900 |
| Both floors, steel beam | £600 – £1,000 | £3,500 – £6,000 | £300 – £600 | £4,400 – £7,600 |
| Stack removal and capping | £500 – £900 | £2,000 – £4,000 | £250 – £500 | £2,750 – £5,400 |
Chimney stack removal cost
Taking a stack down to the roofline costs £800 to £1,800, or £1,000 to £2,500 in London, and takes 1 to 2 days. Scaffold adds £400 to £900, and reinstating the roof covering where the stack stood adds £300 to £800.
Councils differ on whether taking down a stack on its own needs building regulations approval, so ask yours before booking. The alternative is keeping it: re-leading a chimney costs £300 to £800 and repointing it £150 to £500.
What pushes the price up
- More floors, or the stack as well. Each extra floor adds 2 to 5 days of labour, and the stack brings the scaffold and the roof work.
- A shared wall. A party wall surveyor adds £700 to £1,500 per neighbour, and a terrace stack is often shared with next door.
- A gas fire or back boiler in the fireplace. A gas fire has to be disconnected by a Gas Safe registered engineer first, and replacing a back boiler with a combi elsewhere costs £3,500 to £6,000.
How chimney breast removal works, step by step
A one-floor removal with a steel beam usually runs in this order:
- An engineer surveys the chimney and designs the support. The calculations usually follow 5 to 7 working days after the site visit.
- The application goes to building control as full plans or a building notice, with the drawings and calculations.
- If the breast is on a party wall, the notice goes to the neighbour at least 2 months before the start date.
- Any gas fire is disconnected by a Gas Safe registered engineer, and any back boiler comes out.
- The masonry above is propped, the breast is taken down brick by brick, and the rubble is bagged and removed.
- The steel beam or brackets go in to the engineer's design, with fire protection where the council asks for it.
- The chimney pot is capped with a ventilated cowl and an air brick goes in low down, so air keeps moving through the redundant flue.
- The wall, ceiling and floor are made good, building control signs the work off, and the completion certificate follows.
How long chimney breast removal takes
The building work is quick. The lead time before it is not.
| Stage | Typical time |
|---|---|
| Engineer's calculations | 5 – 7 working days after the site visit |
| Full plans decision | Within 5 weeks, or 2 months if you agree |
| Building notice | Work can start 2 days after submission |
| Party wall notice, shared wall | At least 2 months before work starts |
| Gallows brackets fitted | 1 – 2 days |
| Steel beam fitted | 3 – 5 days |
| Breast removal, per floor | 2 – 5 days |
| Full removal with the stack | About 1 week |
On a shared wall the notice period sets the pace. Serve the party wall notice before anything else, because its 2 months run while the engineer and building control do their part.
Chimney breast already removed without approval
If a breast in your house came out with no paperwork, the fix in England is regularisation: a retrospective application to the council, open to work carried out after 11 November 1985. An engineer inspects the existing support and reports on whether it is adequate, and the council can require more work before it signs off.
In London, the engineer's report costs £500 to £900 and the whole retrospective job £900 to £3,200, depending on what the engineer finds.
Buying a house with the chimney breasts removed
Look at the roof and into the loft. If the stack is still there and the breasts below are gone, something is holding it up, and the seller should be able to show what.
Chimney breast removal in Scotland, Wales and Northern Ireland
The structural job is the same across the UK. The approval route and the neighbour law are not.
| Nation | Approval before work | Neighbour law |
|---|---|---|
| England | Building regulations approval | Party Wall etc. Act 1996 |
| Wales | Building regulations approval, under Welsh Approved Documents | Party Wall etc. Act 1996 |
| Scotland | Building warrant | No Party Wall Act; the Tenements (Scotland) Act 2004 in tenements |
| Northern Ireland | Building Control approval | No Party Wall Act |
Wales
In Wales, the building regulations are very likely to apply to removing all or part of a chimney breast, as an alteration to the structure. Contact the council's building control or an approved inspector before any work. The Party Wall Act applies in Wales as it does in England.
Scotland
Scotland issues building warrants rather than building regulations approval. An alteration to an element of structure sits outside the list of work that needs no warrant, so a chimney breast removal needs a warrant before work starts.
The Party Wall Act does not apply in Scotland. In a tenement, section 9 of the Tenements (Scotland) Act 2004 bars any owner from doing anything that would materially impair the support or shelter of another part of the building, and any owner affected can enforce it. A chimney breast in a tenement flat usually carries flues and masonry from the flats above.
Northern Ireland
In Northern Ireland, structural alterations need Building Control approval, and removing a chimney breast generally means installing a beam or lintel. The Party Wall Act does not apply there, but work on a shared wall still affects next door, so agree it with the neighbour in writing first.
Common questions
How much does it cost to have a chimney breast removed?
Removing a chimney breast from one floor costs £1,500 to £2,500 in the UK in 2026, or £2,000 to £3,000 in London, including labour, waste removal and basic making good. Fees come on top: £350 to £700 for the engineer, £200 to £400 for building control and £700 to £1,500 per neighbour for a party wall surveyor. With a steel beam and redecorating, a ground-floor job on a shared wall lands at £3,050 to £5,850.
Do you need permission to remove a chimney breast?
You need building regulations approval to remove a chimney breast in England, but not planning permission for the internal breast. A listed building needs listed building consent, and taking a stack down in a conservation area can need planning permission. If the breast is on a shared wall in England or Wales, you also serve a party wall notice at least 2 months before work starts.
Is it worth removing chimney breasts?
Removing a chimney breast is worth it when the room needs the space, such as a wall for kitchen units or a wardrobe, and you will never want a fire on that wall. Budget beyond the builder's quote, because the fees can take a £1,500 job past £3,000. Keep the completion certificate, or you have nothing to show a buyer.
Do you need a structural engineer to remove a chimney breast?
You need a structural engineer, because building control needs drawings and calculations for the support that holds up the masonry above. The calculations cost £350 to £700 and usually arrive 5 to 7 working days after the site visit. The engineer also chooses between a steel beam and gallows brackets.
How long does it take to remove a chimney breast?
Removing a chimney breast takes 2 to 5 days per floor on site, and a full removal with the stack about a week. Gallows brackets take 1 to 2 days to fit and a steel beam 3 to 5. On a shared wall, the 2-month party wall notice usually sets the start date, so serve it first.
Can you remove a chimney breast on the ground floor only?
You can remove only the ground-floor chimney breast, as long as the breast and stack above sit on a steel beam or gallows brackets designed by a structural engineer. It is the cheapest breast job, at £1,500 to £2,500 before fees. Stepping the brickwork out to carry the breast above, known as corbelling, is not a safe substitute.
Do I need a party wall agreement to remove a chimney breast?
You need to serve a party wall notice if the chimney breast is on a wall shared with a neighbour in England or Wales. The notice goes at least 2 months before work starts, and the neighbour has 14 days to reply. If they consent in writing, no surveyor is needed; if not, a surveyor's award costs £700 to £1,500 per neighbour.
What if a chimney breast was removed without building regulations?
A chimney breast removed without approval can be put right in England through regularisation, a retrospective application to the council for work carried out after 11 November 1985. An engineer reports on whether the existing support is adequate, and the council can require more work before it signs off. In London the whole process runs £900 to £3,200.
How much does chimney stack removal cost?
Removing a chimney stack down to the roofline costs £800 to £1,800 in the UK in 2026, or £1,000 to £2,500 in London. Scaffolding adds £400 to £900 and reinstating the roof covering £300 to £800. The work takes 1 to 2 days, and councils differ on whether a stack alone needs building regulations approval.
Can gallows brackets still be used for a chimney breast?
Gallows brackets are still accepted by some councils, but most London building control bodies now expect a steel beam. Where brackets are allowed, the council can ask for pull-out tests on the fixings and 30 minutes' fire protection. In London, a one-floor job on brackets costs £1,750 to £2,900 against £3,200 to £5,700 with a steel beam.