Glenallen School is located in an eastern suburban residential area, its buildings surrounded by native bush and gardens.

The school has two acres under roof with buildings comprising specialist areas, primary, secondary and transition classrooms set around courtyards. The grounds include specifically designed recreation areas and a sensory garden.

Specialist facilities include a computer lab, library, hall, swimming pool complex, sensorimotor & physio gyms, multisensory room, art/craft, independent living centre, music and individual therapy rooms. Community groups often utilise the conference room in the administration and staff centre.