Ontario Construction Report staff writer
EllisDon has reached a major milestone in the expansion of the Art Gallery of Ontario, signing the final structural beam on the project that will house the new Dani Reiss Modern and Contemporary Gallery.
The ceremony marks a significant step forward in the redevelopment of the Art Gallery of Ontario, and reflects a construction partnership that dates back more than two decades.
EllisDon first worked on the AGO in the early 2000s during its landmark transformation designed by architect Frank Gehry, a project that reshaped the institution’s downtown footprint.
“For many of our people, coming back to the AGO feels deeply personal,” said Joe Bechberger, Senior vice president, operations at EllisDon. “Some of us remember the original transformation and the pride that came with it. To return years later and be part of the gallery’s next chapter is incredibly meaningful.”
The beam signing represents both a construction milestone and recognition of the teams working behind the scenes to deliver complex work within an active public institution, he added.
The expansion is being completed while the AGO remains fully operational, requiring carefully sequenced construction around occupied galleries and sensitive building systems. Teams have worked to ensure the visitor experience and protection of artworks were not disrupted during major structural work above active spaces.
Continuous monitoring and coordination have been used to safeguard the gallery’s collection, including strict environmental controls for temperature-sensitive works.
The Dani Reiss Modern and Contemporary Gallery is being designed by a collaborative team including Diamond Schmitt Architects, Selldorf Architects, and Two Row Architect.
It is also being developed with sustainability and long-term performance in mind, including net-zero carbon targets, fossil fuel-free operations, and adherence to the Bizot Green Protocol.
An Indigenous Advisory Circle led by Two Row Architect continues to guide the project, ensuring Indigenous perspectives are embedded throughout design and delivery.
Among the most sensitive moments in construction was a coordinated overnight operation to adjust critical cooling infrastructure. The work had to be completed within a tight window to ensure artworks remained protected and gallery operations could continue without interruption.
Project teams completed the work successfully, avoiding any disruption to the institution or its collections.
EllisDon officials say the project has required close coordination across multiple teams and disciplines, working in partnership with designers, consultants and the AGO to maintain public access while advancing construction above an active cultural space.
While the beam signing marks a visible milestone, the company said it also reflects a deeper continuity of relationships and a shared commitment to strengthening one of Canada’s most significant cultural institutions.