Do I Need a Party Wall Agreement for Chimney Breast Removal?

If you are removing a chimney breast attached to a shared wall, the Party Wall etc. Act 1996 will apply. This is because the chimney breast will be bonded into the party wall structure.

If the Act applies and you do not follow the correct process, your neighbour may take legal action.

In this guide, we explain when a party wall agreement is required for chimney breast removal, what you should do next, and if you need a party wall surveyor. 

Why Chimney Breast Removal Often Requires a Party Wall Agreement

Many terraced and semi-detached houses have chimney breasts that are built into the party wall.

When you remove part or all of the chimney breast, you are altering a shared structure. This can affect the structure of the wall and potentially impact the neighbouring property.

For this reason, chimney breast removal is one of the clearest examples of work covered by the Party Wall Act.

When Do You Need a Party Wall Agreement for Chimney Breast Removal?

You will need to serve a party wall notice if your work involves:

• Removing a chimney breast that is bonded  in to a party wall
• Cutting into the party wall to install supports
• Inserting steel beams or gallows brackets
• Altering the structure of the shared wall in any way

If your neighbour consents, you may proceed without appointing surveyors.

If they dissent or do not respond within 14 days, surveyors must be appointed and a party wall award prepared.

What If My Chimney Breast Is on My Side Only?

Even if the chimney breast appears to sit on your side, it may still be bonded in to the party wall structure.

The key question is whether the work affects the shared wall or its structural support.

Removing a chimney breast involves cutting bricks that extend in to the party wall and may also require cutting into the party wall to install supports. This brings the work within the scope of the Act.

If there is any doubt, it is best to confirm this before starting work.

Can I Remove a Chimney Breast Without a Party Wall Agreement?

Only if the Party Wall Act does not apply or your neighbour has given written consent.

If the work affects the party wall and you do not serve notice, you are taking a risk.

Your neighbour may take legal action to delay or stop the works until the correct process is followed.

What Happens If My Neighbour Removes a Chimney Breast Without a Party Wall Agreement?

If your neighbour removes a chimney breast and you believe the Act applies, you should act quickly.

Check whether:

• The chimney breast is attached to a shared wall
• Structural work has been carried out
• You have received any formal notice

If notice should have been served but was not, you may have options to protect your position.

Early advice is important, especially if structural work has already taken place.

Do You Need Permission to Remove a Chimney Breast in the UK?

Chimney breast removal usually requires Building Regulations approval because it involves structural work.

Planning permission is not always required unless the work affects the external appearance of the building, such as removing a chimney stack.

The Party Wall Act is separate from both planning and Building Regulations. Even if planning permission is not needed, the Act may still apply.

How Much Does a Party Wall Agreement Cost for Chimney Breast Removal?

Costs vary depending on whether surveyors are required.

As a general guide:

• If your neighbour consents, costs are minimal
• If surveyors are appointed, fees will depend on the complexity of the work

Chimney breast removal is less complex than some other types of work falling within the scope of the Act  but still requires careful structural consideration.

We explain typical costs in more detail in our party wall surveyor cost guide.

What Is the Process for Chimney Breast Removal Under the Party Wall Act?

The process usually follows these steps:

1. Confirm whether the work falls within the Party Wall Act
2. Serve a party wall notice on the affected neighbour
3. Wait up to 14 days for a response
4. If consent is given, proceed carefully
5. If your neighbour dissents, appoint a surveyor or surveyors
6. Wait for the surveyor(s) to agree and serve the party wall award
7. Begin work in line with the award

Starting this process early helps avoid delays once builders are ready to begin.