Throughout the school each child is allocated to one of eight houses. All students will be involved in House competitions. In Frogmore, pastoral care becomes House based. Each student will have a House Mentor and House Coordinator.

The houses are:

• Finlay Anderson (Gold)
• Drinan (Green)
• Anderson (Red)
• Jones (Navy)
• Were (Sky Blue)
• Lionel Large (Green and Gold)
• Deighton (Black and Red)
• White (Royal Blue and Gold)

Mentone Grammar has a vertical pastoral care system which allows each student's 'story’ to continue as he or she journeys towards adulthood. Each student, on entering the School, is allocated to one of eight Houses. Each House, under the guidance of House Co-ordinators consists of a small number of students from each year level, which allows for cross age mentoring and leadership to develop. Students continue in the same House for their entire stay in the School. Students from the same family are usually designated into the same House.

House Co-ordinators bear the overall responsibility for the pastoral care of the students in their House, for the development of leadership among the students and for the smooth running and positive tone of the House.

Mentone Grammar Houses also provide the opportunity to engage in healthy House spirit through competitions in sport, music, drama, chess, oratory and debating.

House Co-ordinators are assisted by teaching staff, who are assigned to each House. The Houses meet regularly and provide opportunities for House activities to be organised by the House Captain and the House Seniors. The Houses undertake learning projects that benefit people in need in the wider community. From time to time House functions are organised involving all the students in the House and their parents such as House Dinners and House Chapel Services.

Mentone Grammar sees the School/parent partnership as a very important supportive element in a student's education. Parents are invited to view communication with their child's House Co-ordinator as trusting and open. It is often the first point of contact for issues relating to their daughter's or son's well-being and performance.