Best Small Project: Rachel Ann Perkinson Center, Tucson, Ariz.
This two-story, 15,000-sq-ft addition to the Muscular Dystrophy Association's headquarters fits seamlessly into the natural desert surroundings and redefines the structure. The existing building's first level became the second floor of the addition during the site's innovative re-design, in which a 20-ft-deep excavation was created directly abutting the existing occupied building. The 20,000 cu yd of rock excavated during construction was reused as rip-rap to create a unique landscape design.