First Market Tower

525 Market Street
525 Market Street
	525 Market Street (center)
	Location within San Francisco
Former names	Tishhman Building, First Market Tower
General information
Type	Commercial offices
Location	525 Market Street ; San Francisco, California
Coordinates	37.7905°N 122.3991°W
Completed	1973
Renovated	1991
Owner	Knickerbocker Properties
Height
Roof	161 m (528 ft)
Top floor	39
Technical details
Floor area	1,083,000 square feet (100,600 m2)
Design and construction
Architect	John Carl Warnecke & Associates
Main contractor	Cahill Contractors, Inc.
References

525 Market Street, once known as First Market Tower, is an office skyscraper at the southwest corner of First- and Market Streets in the Financial District of San Francisco, California. The 161 m (528 ft), 39 floor tower was the second largest office building by square footage in the city (after 555 California Street) when completed in 1973.^[4] It is owned by the New York State Teachers Retirement System since 1998.^[5] It is one of 39 San Francisco high rises reported by the U.S. Geological Survey as potentially vulnerable to a large earthquake, due to a flawed welding technique. ^[6]