The Building Safety Act (BSA) of 2022 is now in effect. This new legislation and a slew of statutory instruments (SIs) and related advice will usher in the most significant regulatory changes to the UK built environment in nearly 40 years. However, even though the BSA received Royal Assent at the end of April 2022, most of its provisions will not take effect for another 12-18 months while secondary legislation is created.