Sustainability is central to all of the activities of 450 Architects. We care passionately about all spheres of environmental impact, such as site, energy, water, materials, and health. We support the U.S. Green Building Council and we have three LEED Accredited Professionals on staff.  San Mateo County (California) hired 450 Architects to support the growth of sustainable design countywide by writing a comprehensive Sustainable Building Guidelines and Checklist that covers all types of construction and projects of all sizes.