(September 28, 2016) Washington State has always been considered a pioneer when it comes to the adoption of greener and more sustainable practices. One of the most sustainable practices is to reuse an already constructed building and enhance that building from within to bring it up to today’s green standards. In 2002, the city of Bellevue, Wash., sought to consolidate all functions under one roof; however, doing so would require additional space as it had outgrown its existing City Hall structure. The city decided to save $50 million on new construction costs and purchase an existing 227,000-sq.-ft. office building at 450 110th Ave., formerly occupied by Qwest. In 2004, architectural firm SRG Partnership began modifying the concrete structure, including seismic upgrades; also added were a new facade, a heating plant and enhanced power distribution. Teams installed a gravel ballast-covered roof with American Hydrotech’s MM6125 waterproof materials. 

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