The building program is spread over three levels: the ground floor, the first basement —partially buried in the slope of the ground—, and finally, the second basement. The teletherapy rooms, the brachytherapy room, the magnetic resonance room, the treatment planning rooms, and the simulation rooms are located in the 2nd basement to facilitate radiation protection measures. The clinical-administrative area, teaching rooms for clients, and electrical and mechanical rooms are in the 1st basement; while the chemotherapy area, the clinical consultation space, and the main reception are on the ground floor. Waiting and instructional spaces are spread over the three levels for an optimal distribution of clients and staff members.
A skylight and a large central courtyard offer outdoor views, facilitate orientation, and bring natural light to the second basement, in addition to creating visual links across the different floors.
The project also includes a rooftop garden and the extension of an existing underground tunnel to connect the new pavilion to the hospital.
The PET-scan suite was the first milestone of the expansion of the Emergency building. On a gross surface area of 901 m², all the main functions—a reception area, a preparation and interview area, an injection area, a PET examination room, and a clinical-administrative area—are constructed as part of the roof expansion of the Emergency building. Its structure allows for the eventual addition of floors to connect the Pavilion St-Joseph to each floor of the expanded Emergency building, which will eventually have five floors in total.