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50 United Nations Plaza

The Federal Building at 50 United Nations Plaza (SF) is an existing historic building constructed between 1934 and 1936, and is recognized on the official National Register of Historic Places as well as the California Register as a National Historic Landmark.

Bullet 350K SF
Bullet $90M construction cost

The building has five principal floor levels, plus a basement and attic totalling approximately 350,000 gross square feet and is configured as a ring with the functional office areas on either side of a grand central corridor. There is a large open courtyard in the center of the building that allows access to daylight and natural ventilation to a majority of the functional space.

The facility underwent a full systems redesign of its mechanical, electrical, plumbing, fire protection, architectural lighting and sustainability systems with reliance on natural ventilation and passive cooling wherever possible.

WSP USA's high performance design group, Built Ecology, provided energy modelling services to show projected energy savings beyond 92.1-2007 ASHRAE energy baseline. This project originally pursued a LEED® Gold certification, but achieved LEED Platinum.