The school began as an outgrowth of St. Mary of the Angels Catholic School with six portables in their schoolyard. It was officially recognized as a separate entity and given the name St. Bruno in March 1974.

September 1975 found them needing more space. Students in kindergarten were at St. Mary of the Angels Church basement, grades 1 to 3 were at St. Patrick's (St. George and College), and grades 4 to 8 were at St. Paul's (Queen and Parliament).

In March of 1976, the students were moved to the portable school on Melita Avenue where they remained for the next four-and-a-half years still in a state of growth.

In December 1980, the present barrier-free building at 402 Melita Crescent was opened. 

The Ontario government has announced that it will spend $9.4 million on a new school to be built where St. Raymond Catholic School currently sits on Barton Avenue, overlooking Christie Pits. The new school — which hasn’t yet been christened with a name — is consolidating St. Raymond’s and St. Bruno Catholic School, both of which are under capacity. The facility will also include a daycare on site, adding 49 childcare spaces to the neighbourhood. Demolition will begin in November 2018. They are aiming for a September 2020 completion date, although it may be pushed to January or September 2021.

• Architect - Kohn Shnier Architects  <-- More buildings by this architect.