Building Regulations in Brief, Fifth Edition

Many of the provisions in Approved Documents are related to the use of the building. The classifications use are termed purpose groups and represent different levels of hazard. They can apply to a whole building, or (where a building is compartmented) to a compartment in the building and the relevant purpose group should be taken from the main use of the building or compartment. Table 6.8 sets out the purpose group classification.
| Title | Group | Purpose for which the building or compartment of a building is intended to be used |
|---|---|---|
| Residential [(1)] (dwellings) | 1(a) | Flat or maisonette. |
| 1(b) | Dwelling house which contains a habitable storey with a floor level which is more than 4.5 m above ground level. | |
| 1(c) | Dwelling house which does not contain a habitable storey with a floor level which is more than 4.5 m above ground level. | |
| Residential (institutional) | 2(a) | Hospital, home, school or other similar establishment used as living accommodation for, or for the treatment, care or maintenance of persons suffering from disabilities due to illness or old age or other physical or mental incapacity, or under the age of five years, or place of lawful detention, where such persons sleep on the premises. |
| Other | 2(b) | Hotel, boarding house, residential college, hall of residence, hostel, and any other residential purpose not described above. |