508.2.3 Allowable building area.
BC § 508.2.3
The allowable area of the building shall be based on the applicable provisions of Section 506 for the main occupancy of the building. Aggregate accessory occupancies shall not occupy more than 10 percent of the building area of the story in which they are located and shall not exceed the tabular values for nonsprinklered buildings in Table 506.2 for each such accessory occupancy. Exceptions: 1. The following accessory occupancies are permitted to occupy more than 10 percent of the floor area of the story in which they are located: 1.1. Accessory assembly areas having a floor area less than 750 square feet (69.7 m 2 ). 1.2. Assembly areas that are accessory to Group E occupancies. 1.3. Accessory religious educational rooms and religious auditoriums with occupant loads of less than 100.
2.Rooms or spaces within Group H-2, H-3, H-4 or H-5 occupancy shall not be considered accessory occupancies and shall be treated as separated occupancies.
