Every building should have a lawfully established use. The intended use of a building sets the building code requirements that ensure it will be safe, healthy and have adequate amenities for that use.
If that use changes, the building may need to be altered to be suitable for the new use.
The regulation divides the uses for all or parts of buildings into four broad activity groups:
- Crowd activities
- Sleeping activities
- Working, business or storage activities
- Intermittent activities
The four broad activity groups each have a number of uses adding up to 15 uses overall. Definitions and examples for each of these uses are also given in Schedule 2 of the regulations.(external link)