Do I need approval to remove a chimney breast?

You rarely need planning permission, but almost always need Building Regulations approval - check if the chimney is shared first.

CR-01The short answerIt depends, but lean towards yes. Removing a chimney breast is structural work, so Building Regulations approval is almost always needed in England, even if you don't need planning permission. If the breast is shared with next door, you may also need to give notice under the Party Wall Act.

CR-02Check which part of the UK you're inThis guide covers England first. Rules differ in Wales, Scotland and Northern Ireland, covered in the last step. Always check your own council or national body before assuming England's rules apply to you.

CR-03What actually decides the answerThe key question is whether the chimney stack above is still supported, usually by a steel beam (gallows bracket or RSJ) once the breast is gone. This is structural work covered by Building Regulations, not planning permission, in almost every case. Whether you also need planning permission usually depends on whether you're removing an external breast that changes the look of the house, not an internal one.

RULES

KNOW THE RULES

You must get Building Regulations approval for the structural work needed to safely support a chimney stack once the breast below is removed.

CR-04Exceptions that change the answerFlats and maisonettes often need freeholder or leaseholder consent on top of any official approval, and the lease may ban structural changes outright. Listed buildings need listed building consent for this work, inside or out. Conservation areas and other designated land can affect external chimney removal, so check before you touch the outside of the stack.

RULES

KNOW THE RULES

You must get listed building consent before altering a listed building, including internal chimney breasts.

CR-05Planning permission and Building Regulations are different thingsPlanning permission is about the impact on neighbours and the area. Building Regulations are about safety, including structural support. For most internal chimney breast removals, you won't need planning permission but you will need Building Regulations sign-off. Not needing one does not mean you can skip the other.

RULES

KNOW THE RULES

You must comply with Building Regulations for structural work even when planning permission is not required.

CR-06Who to ask and howContact Building Control, either your council's building control team or a registered building control approver, to apply for approval before work starts. If the chimney breast is shared with a neighbour's property, check the Party Wall Act applies and consider a party wall surveyor. For planning questions, use the Planning Portal, and ask about a Lawful Development Certificate if you want written proof you didn't need permission.

RULES

KNOW THE RULES

You must serve notice under the Party Wall Act 1996 before starting work that affects a shared wall or structure with a neighbour.

CR-07Realistic costs and timescalesA Building Regulations building notice or full plans application typically costs a few hundred pounds, varying by council. A structural engineer's calculations for the supporting beam usually add a few hundred pounds more. A party wall surveyor, if needed, often costs roughly £700 to £1,500 or more per surveyor. Expect several weeks for approvals before work can legally start.

CR-08What happens if you skip itBuilding Control can ask you to expose and fix unapproved work, even if it means opening up finished ceilings or walls. Unsigned-off structural work is a common problem when selling, and buyers' solicitors will ask for the completion certificate. An indemnity insurance policy can sometimes cover the risk, but it's a last resort, not a fix, and won't help if the work is actually unsafe.

RULES

KNOW THE RULES

You must have Building Regulations completion certification for structural work, or you may be required to put it right later.

CR-09If you live in Wales, Scotland or Northern IrelandWales follows a similar Building Regulations and planning system to England, but check the Planning Portal for Wales-specific rules. In Scotland, removing a chimney breast is structural work, so expect to need a building warrant before starting; check with your council's building standards team or mygov.scot. Northern Ireland has its own planning and building control system entirely; check nidirect for the correct process.

RULES

KNOW THE RULES

You must get a building warrant from your local authority in Scotland before starting structural work like chimney breast removal.

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