PCL : Constitution Square Phase III

Constitution Square Phase III

Project Overview

Tower III of Constitution Square in downtown Ottawa is a mirror image of the existing Phase I tower. The new building's design emphasizes efficiency, with floor plates that allow more people to work in less space, and to do so in absolute comfort. The 19-story, 330,000-square-foot tower exceeds Canadian Building Incentive Program standards for environmental efficiency, and complies fully with the Building Owners and Managers Association of Canada's "Go Green" environmental standards for building operations. Tenants of Tower III enjoy Constitution Square's exceptional amenities, including a fully equipped fitness center, a state-of-the-art conference center, and a beautifully landscaped third floor terrace.

The project began as a construction management contract, and was converted to a guaranteed maximum price contract once work on the structure began. This provided the owner with cost certainty, as well as the potential of future cost savings. PCL returned approximately $350,000 to the owner as a result of the shared savings program.

The biggest challenge was maintaining the scheduled completion date for the first eight stories of the tower. These floors had to be ready to allow anchor tenant to begin fit-up work as early as possible. To maintain this schedule, planning and coordinating construction activities was critical. Work began with blasting and excavating for the construction of three stories of below-grade parking. At the peak of construction, the building structure went up at a rate of one story per week.

The tower features a panelized curtain wall system, which enabled seamless and well-coordinated installation. Having the building envelope installed quickly allowed work on the mechanical, electrical, and critical life safety systems to begin well in advance of structure completion. All these elements combined to provide the owner with a building that was completed on time and under budget.


Oxford Properties Group Inc.
Ottawa, ON
Ottawa – Buildings & Civil Construction
PCL Constructors Canada Inc.
Commercial, Parking Structures
Construction Management