In 1852 the Consumers' Gas Company of Toronto established its new head office building on this site in the prestigious financial district of the city. Expansion to the north in 1876 added a second building at 19 Toronto Street, designed in the renaissance style by architect David B. Dick, whose later alterations in 1899 unified the façades of both buildings. The company remained in this location for 125 years. Renovations, undertaken by Stone and Kohn Architects, for Counsel Trust Company were completed in 1985.