Carey’s House system is designed to facilitate strong relationships and build student connections across year levels. Carey students and educators regularly collaborate in House groups, enhancing engagement with school, developing peer support systems and improving student wellbeing.

Houses compete in sports and performing arts throughout the year which supports each student's personal growth.

At Carey, there are 10 Houses in the Middle School (Years 7 to 9) and 10 Houses in the Senior School (Years 10 to 12). Junior School Kew has eight Houses, and Carey Donvale has four Houses (Prep to Year 6). Each House is made up of approximately 80 students, and is designed to provide another layer of connection beyond the larger school section of approximately 400 to 800 students. This layering is taking another step through the support provided to students by their teacher mentors.

Each Middle and Senior School House group is broken into separate mentor groups of 16 students to each mentor. The students retain the same mentor throughout their three-year period in each of the secondary school sections, Years 7 to 9 and Years 10 to 12.

Learning Mentors facilitate a focus on education and learning where students are supported to take ownership of their own learning and personal development.