The new addition acts as a backdrop to the historic buildings on Bloor. The glass pavilion sits on a solid masonry base and is set apart from the historic buildings. The space between old and new was covered to create a skylit pedestrian route through the site, and to enrich the experience of the polychromatic masonry walls of the historic buildings. Within the glass pavilion, three storeys of lobbies wrap the new 1,135 seat concert hall, Koerner Hall.
The design of Koerner Hall reflects a highly integrated collaboration between architect and acousticians to provide the RCM with a highly flexible, acoustically superior environment for classical, jazz, world, semi-staged opera, lectures and films. It features a floating veil of twisting oak strings and sinuous curved balconies that wrap the hall to create an intimate acoustical experience with optimal sightlines. The stage is proportioned to accommodate a range of performance groups, students to maestros.