Cannon Design Regional Offices by Cannon Design. After standing vacant for nearly 30 years, the St. Louis Municipal Power House building at 1100 Clark Avenue in downtown St. Louis, opened as the new offices of Cannon Design in September 2008. In 2007, the firm purchased the 19,000 sqf building and provided all design, development, and construction management services for its restoration, renovation and adaptive reuse—an investment that represents the firm’s confidence in the future of the city of St. Louis.
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