The school has 3 Houses: Dragon, Buffalo, and Phoenix. All Early Years – Year 11 students and academic staff take an active part in House activities. All students become a member of a House when they enter the school and are encouraged to participate in House activities. Siblings are placed in the same House. House allocations are determined at the time of enrolment, and once a student is assigned to a house, they may not change during the course of their academic career at HAIS.
Inter-House competitions range across a wide variety of activities, including but not limited to the HAIS Athletics Carnival and the HAIS Swimming Carnival.