Works to traditional and historic buildings must comply with the Building Regulations. You may need a building warrant.
This applies whether the building is or is not listed or in a conservation area.
A building warrant is separate from and additional to requirements under planning legislation. It is primarily concerned with building safety, energy efficiency and sustainability. Alterations to a building must comply with planning legislation and building regulations.
There is provision for relaxation of the building regulations in order to achieve the most appropriate outcome in individual circumstances.