When removing a chimney breast in the UK, there are several building regulations that must be followed to ensure the safety and stability of the building. Some of the key building regulations to consider include:


Load-Bearing Walls: If the chimney breast is a load-bearing wall, its removal can affect the structural stability of the building. In this case, you will need to have a structural engineer assess the building and provide recommendations for any necessary work to ensure its safety.


Fire Safety: If the chimney breast is part of the flue system, you will need to ensure that the removal does not pose a fire hazard. You may need to install a new flue or make other arrangements to vent your heating system safely.


Party Wall Agreements: If the chimney breast is shared with a neighboring property, you may need to have a party wall agreement in place before removing it. This agreement sets out the responsibilities of each property owner and ensures that the work does not cause damage to the neighboring property.


Building Notice or Full Plans Application: Depending on the extent of the work involved, you may need to submit a building notice or full plans application to your local building control department. This will allow the building control inspector to review the plans and make sure that the work complies with the building regulations.


Ventilation: After removing the chimney breast, you will need to ensure that the building is adequately ventilated. This may involve installing ventilation systems or making other arrangements to ensure that the building is well ventilated and safe to occupy.


It is important to note that building regulations can vary between different local authorities in the UK, so it is advisable to contact your local building control department for specific advice and guidance on the building regulations that apply to your case.