100 California Renovation

Heller Manus renovated the top floor and roof of the historic building at 100 California Street in downtown San Francisco in 2018. The building was originally built for Bethlehem Steel in 1960 and the roof level included a private apartment for executives to use. What HM renovated into the 14th floor was previously a mechanical penthouse containing an outdated cooling tower for the building and various other mechanical equipment. Heller Manus updated all the mechanical equipment, closed off the 14th floor to create additional rentable office space, relocated all the mechanical equipment to the space that was formerly the executive apartment and created a roof deck for the new 14th-floor tenant. This project was complex due to the historic designation of the building. Although the 14th floor is now office space, from the street it had to appear unchanged.