Meeting the requirements of the Building Regulations is the responsibility of the person carrying out the building work and, if they are not the same person, the owner of the building. The building regulations apply to most building work, therefore it is important to know when approval is needed.
Some kinds of building projects are exempt from the Regulations, however generally if you are planning to carry out 'Building Work' as defined in Regulation 3 of the Building Regulations, then it must comply with the Building Regulations.
If you do not follow the building control procedures set out for handling your building work or you carry out building work which does not comply with the requirements contained in the Building Regulations you will have contravened them.
It is generally realised that a form of permission is required for building work or alterations of properties. However, it may not always be clear how the Planning and Building Regulations approval regimes differ.