Building regulations ensure that an acceptable standard of health and safety is provided for people in and about buildings. They also require adequate access and facilities for disabled persons as well as specifying measures to control energy consumption.
It is the responsibility of the builder to ensure that requirements are complied with. Building Control will instigate the appropriate action where works or procedures contravene.
It should be remembered that Building Control do not control the quality of the work undertaken and separate supervisory arrangements in this respect should be made if you consider it necessary.