Campoamor Architects, 1540 Euclid Ave, Berkeley, CA 94708, US

Arkin Tilt Architects is an architectural firm specializing in ecological planning and design. Based in Berkeley, Calif., the company's project portfolio includes residential/commercial construction, park buildings, religious facilities and eco-resort planning and design. It also specializes in alternative construction systems, including straw-bale and rammed earth, renewable energy systems, greywater and non-toxic as well as recycled materials. Arkin Tilt Architects has completed numerous projects, such as Hidden Villa Youth, Portal San Miguel Yoga Center, Gaut-Camarillo Residence and Eastern Sierra Residence. The company is the recipient of the 2008 Builder's Choice Awards.