Boilers and heating
Circuits and Electrics
Ground source heat pump (internal unit)
Micro-Combined Heat and Power / Biomass
Unimproved loft space
Building Regulations approval is not required unless the works involve modification or movement of the electrics or alterations to the foul drainage.
Where the works involve electrics, they must be carried out by a person whom IS Part P Competent Person, otherwise a building regulations application will be required.
A list of Part P competent persons can be viewed