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Groupe Mach plans to redevelop a vacant former federal building in Ottawa to a multi-residential rental high-rise.

Mach to Redevelop Former Federal Office Building in Ottawa

Groupe Mach plans to redevelop a vacant former federal building in Ottawa as a multi-residential rental high-rise, the Ottawa Business Journal reported.

Mach will likely demolish the existing building, which previously served as a Department of National Defence office property, Vincent Chiara, Mach’s president, told the OBJ. Montreal-based Mach purchased the 1970s-era building in 2021 from Cominar REIT for $40 million.

Many developers are contemplating, or have already begun, conversions of Ottawa office properties to rental housing. But Mach’s project at O’Connor and Slater streets would involve construction of an entirely new building.

“A lot of those existing buildings don’t convert easily, and the costs of conversion are usually higher than building from scratch,” Chiara told OBJ.

Office-to-residential conversions are gaining momentum in Ottawa, says a new Avison Young report. The OBJ previously reported that two federal office buildings are sitting vacant in the nation’s capital.

The federal government plans to repurpose more of its Ottawa office buildings into residential properties.

Photo: Tolmachova /


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About Monte Stewart

Monte Stewart serves as Content Director - Canada for Connect Commercial Real Estate. Based in Vancouver, British Columbia, Monte provides daily news coverage of major Canadian commercial real estate markets, including Vancouver, Toronto, Montreal and Calgary. He has written about the real estate sector for various media outlets and Avison Young since the early 2000s. In addition, he has covered sports, general news and business for several leading wire services and publications, including The Canadian Press, The Associated Press, The Calgary Herald, The Globe and Mail, Research Money, The Daily Oil Bulletin, Natural Gas World and The Toronto Star. Monte is active in his community as a youth basketball coach and raises funds for such charitable causes as Movember.

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