The short answer
Removing a chimney stack (the part above the roof) commonly costs around £900–£1,200 on its own, rising to roughly £2,750–£5,400 once a structural engineer, scaffolding, builder labour and building control fees are included for a fuller job. The key thing to know is that chimney removal is notifiable work under the Building Regulations regardless of whether planning permission is needed, so building control sign-off is required. Removing a chimney breast inside the house affects structure: the masonry above must be supported, usually by a steel beam (many building control bodies now query or reject gallows brackets), and on a semi-detached or terraced property a shared stack normally involves a party wall agreement with the neighbour. This page is general guidance, not legal advice — confirm your own case with your local building control and a structural engineer.
Chimney removal is part cost, part regulation. The figures below are typical for guidance, but the rules — building control, structural support and party wall — are the part to get right before any work starts.
Costs & rules in brief
- Stack removal (alone)~£900–£1,200
- Fuller job (engineer, scaffold, fees)~£2,750–£5,400
- Building Regulationsnotifiable — sign-off required
- Supportusually a steel beam
- Shared stack (semi/terrace)party wall agreement
What removal typically costs
Removing the chimney stack above the roof line is the more contained job, commonly around £900–£1,200 depending on size and whether scaffolding is hired. A fuller removal that involves a structural engineer's design, scaffolding, builder labour and building control fees more typically lands around £2,750–£5,400. Removing a chimney breast inside the house is a separate, larger job again, because the masonry above has to be supported and the rooms made good. As with every job here, the access — scaffolding — is a significant share of the cost.
| Item | Typical figure | Notes |
|---|---|---|
| Stack removal (alone) | ~£900–£1,200 | size & scaffold dependent |
| Fuller job (with engineer & fees) | ~£2,750–£5,400 | engineer, scaffold, labour, control fees |
| Structural engineer's fee | ~£500–£900 | design & calculations |
| Building control fee | ~£250–£500 | sign-off of the work |
Indicative UK figures for guidance. Sources: SBS Structures and HomeAdviceGuide cost guides.
The Building Regulations and structural rules
Chimney removal is notifiable work under the Building Regulations, whether or not planning permission applies, so the work must be signed off by building control. Where a chimney breast is removed, the brickwork above it must be properly supported — most building control bodies now expect a steel beam and may query or reject older gallows bracket designs, which is why a structural engineer is normally involved. On a semi-detached or terraced house, a shared stack sits on the party wall, so a party wall agreement with the neighbour is normally needed before work starts. These are factual flags, not legal advice — confirm exactly what your project needs with your local building control and a structural engineer.
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Frequently asked questions
How much does it cost to remove a chimney stack?
Removing the stack above the roof commonly costs around £900–£1,200 on its own, rising to roughly £2,750–£5,400 once a structural engineer, scaffolding, builder labour and building control fees are included for a fuller job.
Does chimney removal need Building Regulations approval?
Yes. Chimney removal is notifiable work under the Building Regulations regardless of whether planning permission is needed, so building control sign-off is required. This is a factual flag — confirm your case with your local building control.
Do I need a party wall agreement to remove a chimney?
On a semi-detached or terraced property, a shared stack usually sits on the party wall, so a party wall agreement with the neighbour is normally needed before work. A structural engineer and your building control can confirm what applies to you.
Sources & further reading
- SBS Structures — chimney stack removal: cost, building regs & process
- HomeAdviceGuide — chimney removal cost guide
- London Borough of Richmond — chimney stack removal and the Building Regulations
Figures on this page are typical UK ranges drawn from published sources and depend on your specific chimney. They are guidance, not a quotation.