Soon to celebrate its centennial, San Francisco’s historic City Hall has reached a sustainability milestone. It was recently awarded Leadership in Energy and Environmental Design (LEED) Platinum certification for Existing Buildings: Operation & Maintenance (EBOM), distinguishing it as the oldest building in the United States to achieve the U.S. Green Building Council’s highest rating.

This accomplishment is the result of sustainable energy, water, and ventilation retrofits as well as conservation strategies, along with operational changes and a location that provides access to amenities—bicycle racks and electric vehicle–charging stations—that encourage the use of alternative transportation resources.

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