The Section J applies to commercial buildings. According to the Building Code of Australia, the energy efficiency requirements of Section J are applicable to:
- Class 3 (hotels, dormitories)
- Class 4 (residential dwelling inside a commercial building)
- Class 5 (offices, therapy centres)
- Class 6 (restaurants, retails)
- Class 7 (carparks, warehouses)
- Class 8 (factories, laboratories)
- Class 9 (hospitals, community centres)
The above building classes require a Section J energy report before applying for a building permit. Also, Class 2 buildings can use Section J DtS provisions under NCC 2022.