HKS Architects has wrapped up a $122 million renovation on the Federal Building at 50 United Nations Plaza (50 UNP) in San Francisco. The firm retained a significant amount of historic features and finishes throughout the D-shaped 1936 Beaux Arts building.
Architectural elements such as horizontal divisions, a rusticated base, and classical ornamentation remain part of the exterior. Inside, original light fixtures and steam radiators underwent retrofits to preserve the building’s period character while upgrading the infrastructure.
“50 UNP has retained its historic exterior and the most significant interior spaces while bringing the interior workplace into the 21st century,” Michele MacCracken, AIA, associate principal and senior vice president with HKS and 50 UNP project manager, said in a statement.
The building— which will accommodate more than 500 employees of the U.S. General Services Administration—is targeting LEED certification through a series of improvements, such as operable windows and ceiling fans that eliminate the need for air conditioning; naturally lit spaces that reduce electrical lighting use; dimmable fluorescent lamps LED lights; solar panels; and a roof covered in vegetation. In addition, HKS restored the original double- and triple-hung wood-framed windows using low-VOC paint, sash replacements, new hardware, and new glass to reduce solar heat gain.