The Bullitt Center is billed as the world’s greenest commercial building.
The University of Washington Integrated Design Lab will offer tours of the Bullitt Center at 1501 E. Madison St. in Seattle Sept. 9, 11 and 12.
The Bullitt Foundation opened the $32.5 million building in early 2013, and bills it as the world’s greenest commercial building. It earned Living Building certification from the International Living Future Institute.