In 2003, a $28 million expansion saw the opening of a new Ambulatory Care Building, for the increasing numbers of patients not needing to stay overnight. The building tripled the number of clinic rooms available on site for patients and staff, and houses 24 pediatric specialty medical and surgical clinics. The architects state that the building "is nearly 40% more efficient than the National Energy Code called for when it was built. Sustainable design features include orientation toward solar exposure, maximization of natural ventilation and natural daylight, concourse ventilation, insulated north walls, reduction in electrical power consumption through daylighting, task lighting, and light and occupancy sensors." The project also involved the nearby B.C. Women's Hospital & Health Centre's new Maternity and Ambulatory Program Clinics, Child and Adolescent Psychiatry, and the Emergency renovation and expansion.