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San Francisco City Hall

San Francisco, CA

Site: 500,000 sf

Designed by Bakewell & Brown in 1915, San Francisco City Hall stands as the centerpiece of one of the most significant Beaux-Arts ensembles in the United States. Heller Manus' award-winning 500,000 sf restoration/seismic renovation of the historic City Hall's interior includes installation of a base isolation system that was the world's largest at the time, repairs of damage resulting from the 1989 Loma Prieta Earthquake, conversion of the main floor's light courts and rotunda into special-events spaces, and second floor upgrades to the mayoral and legislative suites. The San Francisco City Hall transformation included the installation of new electrical, lighting, and communications networks that allow city workers to take full advantage of the latest technology, heating, ventilation, and air-conditioning systems. Special attention was given to the building's illustrious exterior - the granite cladding, copper dome, and lanterns were all cleaned and the dome gilded. The skylights and roof membranes were replaced, and the metal balcony railings, lamps, and sconces were each repaired or refurbished.