A retrofit design and construction for St. Joseph’s Health Care Centre in Toronto, this project solves two problems: degradation of the existing Service Tunnel link and poor access to the historically significant Sunnyside wing. We designed and implemented improvements to excavate, partially demolish and reconstruct the tunnel to correct a long standing water intrusion problem. Site works, including new stairs, canopy, landscaping and a future ramp were designed to upgrade accessibility and provide a Barrier Free connection between two existing buildings.