How much does it cost to remove a chimney breast?

Removing a chimney breast in the UK typically costs between £1,500 and £4,500, depending on whether it’s a single storey or full height removal, the materials involved, and any structural support needed afterwards. It’s a bigger job than it first appears, with structural considerations at every level the chimney passes through. We’ll cover whether it’s worth it, the permission rules, and what affects cost.

Is it worth removing a chimney breast

For many homeowners, removing an unused chimney breast frees up useful floor space, particularly in smaller rooms where the breast takes up a noticeable corner. It can also simplify redecorating and, in some cases, make a room feel more open.
On the other hand, if the fireplace is still used or you might want to use it in future, removal is permanent and costly to reverse. Some buyers also value original features like fireplaces, so it’s worth considering how it might affect the property if you plan to sell.

Do you need planning permission to remove a chimney breast in the UK

In most cases, removing an internal chimney breast doesn’t require planning permission, as it’s considered an internal alteration. However, building regulations do apply, particularly regarding the structural support needed where the chimney is removed but the stack above remains.
If the chimney is shared with a neighbouring property, like in a semi-detached or terraced house, a party wall agreement may be needed before work starts, since the chimney often forms part of a shared structure.

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Is it a big job to remove a chimney

Removing a chimney breast on a single storey, with the stack above also being removed, is a moderate job, but removing a breast on a lower floor while leaving the stack above in place is more involved, since the remaining structure needs proper support, usually with steel beams (often called gallows brackets or RSJs).
Full removal of the entire chimney, from roof to base, is the biggest version of this job, involving roof work to make good where the stack penetrated the roof, as well as the internal removal at every floor level.

How difficult is it to remove a chimney breast

The difficulty depends mainly on what’s being removed and what’s left behind. Removing just the breast on one floor while the chimney continues above requires careful structural support to transfer the load that the breast was previously carrying, which is a job for a structural engineer to specify.
Dust and disruption are also significant considerations, chimney breasts contain a lot of brick and mortar, and removal generates substantial debris that needs proper disposal. Most homeowners find this a messier job than other home alterations of similar cost.

What’s included in chimney breast removal costs

Costs typically cover the removal and disposal of brickwork and mortar, structural support where needed (such as steel beams), making good the resulting gap in walls and ceilings, and if the full stack is removed, roof work to weatherproof where it previously penetrated the roof.
Plastering and decoration to finish the room afterwards is sometimes included and sometimes priced separately, so it’s worth clarifying this when getting quotes to understand exactly what you’re getting for the price.

Chimney breast removal scope and typical costs

The wide range reflects how much structural work, roofing, and making good is involved, so a site visit is really the only way to get an accurate figure.
If you’re only removing part of the chimney, get a roofer or builder to confirm what’s involved at the roof level too, since even partial removal can affect flashing and weatherproofing around the remaining stack.

Removing a chimney breast can free up valuable space but it’s a structural job that needs proper planning, particularly around support and any work needed at roof level. Getting a roofer or builder to assess the whole chimney, not just the room you’re focused on, gives a clearer picture of the full cost.

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Frequently Asked Questions

How much does it cost to remove a chimney breast?

Typically between £1,500 and £4,500, depending on whether it’s a partial or full removal and what structural support is needed.

Is it worth removing a chimney breast?

It can free up useful space, but it’s a permanent change, so consider whether the fireplace might be wanted in future and how it could affect the property’s appeal.

Do you need planning permission to remove a chimney breast in the UK?

Usually not for internal removal, though building regulations apply, and a party wall agreement may be needed for shared chimneys.

Is it a big job to remove a chimney?

It can range from moderate to substantial depending on scope, full removal including the stack and roof work is the biggest version of the job.

How difficult is it to remove a chimney breast?

The main difficulty is providing proper structural support where the breast is removed but the stack above remains, which needs an engineer’s input.

Do I need a structural engineer to remove a chimney breast?

If the chimney stack above is staying in place, yes, an engineer typically needs to specify the structural support required.

What happens to the chimney stack if I remove the breast downstairs?

It needs to be supported by steel beams or similar, transferring its weight to the surrounding walls instead of the removed breast.

Can I remove a chimney breast myself?

Due to the structural implications and amount of debris involved, this isn’t generally recommended as a DIY project.

Does removing a chimney affect my roof?

If the full stack is removed, yes, the roof needs to be made good where the chimney previously penetrated it, which is roofing work.

How messy is chimney breast removal?

It’s a dusty, debris-heavy job involving significant amounts of brick and mortar, so dust protection and proper cleanup are important.

Will removing a chimney breast affect my neighbours?

If the chimney is shared between properties, a party wall agreement is often needed before work begins.

How long does chimney breast removal take?

A single breast removal with structural support might take a few days, while full chimney removal including roof work takes longer.

Does removing a chimney breast include making good the walls?

This is often included, but it’s worth confirming with your quote, as plastering and decoration are sometimes priced separately.

Should I get a roofer involved if I’m only removing a chimney breast inside?

Yes, especially if any part of the stack is being removed, since this affects the roof and needs proper weatherproofing afterwards.