The North Building, built more than forty years ago, was the oldest structure on the University of Toronto Mississauga campus. This building was constructed in 1967, shortly after the campus was established, and was intended to be a temporary structure; it was originally scheduled for demolition after the William G. Davis Building (formerly the South Building) was opened in 1971. The building was crowded, had poor air quality and did not meet today's standards for academic and support space.

The completed Phase A of the new building accommodates the Department of Mathematics and Computational Sciences, the Department of Psychology, new and improved Theatre and Drama Studes rehearsal studios and related support space, new classrooms, expanded student amenities (such as study and lounge facilities), and re-instated food services.

Now under construction, the larger Phase B will add 210,000 square feet of academic, administrative, and student community space.