Under schedule II of the Building Control Regulations, 2020, buildings are classified under class A, B and C. Class A comprises of complex structural forms, that is, public buildings, multi storeyed buildings more than 12m high, building complexes (mixture of all) such as schools, hospitals, shopping malls, buildings of high social impact or to be located in sensitive ecosystem among others.

Class B is comprised of residential or commercial buildings; floor area <30m2; single or multi-storeyed of up to 12m high of simple structural form, boundary wall built of bricks, concrete or other solid material of permanent nature.

Lastly class C is comprised of minor and temporary buildings; Floor area <30m2; single storey; of simple structural form.