Building regulations approval

To comply with the Building Act 1984 and the subsequent statutory instruments known as the Building Regulations, Building regulations approval is required to construct certain structures in England and Wales. Construction projects falling into this category are sometimes referred to as "notifiable", however this is different from the "notification" (which may also be required under the Construction (Design and Management) Regulations 2015, which seeks to monitor health and safety in construction projects.

Source: Wikipedia — Building regulations approval (CC BY-SA 4.0)