Rujax III, LLC announced today that The Mason Williams has been awarded LEED® green building certification at the Gold Level. The Mason Williams is a 76-unit mixed-use building at the corner of North Williams Avenue and Mason Street in Portland. Rujax III partnered with LRS Architects to design and Ruben J. Menashe, Inc. as general contractor, to build the progressive close-in urban development, and construction began in the spring of 2013.