Adaptive redevelopment of the historic 110-year old Supply Laundry building, vacant for over a decade, required an upgrade to the stringent 2009 Seattle Energy Code. To maintain as much of the architectural character as possible, the owners partnered with the National Trust for Historic Preservation and the City on the nation’s first outcome-based energy code pilot project. In exchange for access to post-occupancy performance data, the City granted code flexibility in how energy targets were to be achieved.