The initial building included two levels of classrooms, two computer labs, a library, offices, a gym.

The school underwent a major expansion, completed in 2003, that saw the addition of a state-of-the-art computer lab and science lab (both equipped with SmartBoard technology), new grade 7 and 8 classrooms, a double gymnasium with a fold-down stage, a visual arts room, music studio, and common areas.

Such projects that were recognized were Science Fairs, composting left over lunches, no idling policy, extensive recycling and many other activities.

Turnbull School students do not wear a uniform, although a crested golf shirt is used for special occasions or field trips.

The Turnbull School Concert Band receive uniforms for performances containing oxford shirts and crested vests.