One Rincon Hill is an upscale residential complex on the apex of Rincon Hill  in San Francisco, California, United States. he complex, designed by Solomon, Cordwell, Buenz and Associates and developed by Urban West Associates, consists of two skyscrapers that share a common townhouse podium. One tower, One Rincon Hill North Tower, is currently under construction and will reach a height of 541 feet (165 m) with 50 stories  The other tower, One Rincon Hill South Tower, is 60 stories and stands 641 feet (195 m) tall.The South Tower contains a number of unique elements, such as high-speed elevators for moving residents effectively, and a large water tank designed to help the skyscraper withstand strong winds and earthquakes. Both skyscrapers and the townhomes contain a total of 709 residential units.

The building site, located right next to the western approach of the San Francisco- Oakland Bay Bridge, formerly contained a clock tower. The clock tower was demolished shortly after the city approved the One Rincon Hill project. Construction of the townhomes and the South Tower lasted from 2005 to 2008, but was stopped for brief periods of time due to seismic concerns and a construction accident. As the South Tower neared completion, it generated controversy concerning view encroachment, high pricing, and architectural style.

General information
Status	Under construction
Location	425 1st Street San Francisco, California
Coordinates	37.78636°N 122.39201°E
Construction started	2012[7]
Estimated completion	2014
Height
Roof	541 ft (165 m)[A]
Technical details
Floor count	50[A]
Design and construction
Architect	Solomon Cordwell Buenz
Developer	Principal Real Estate Investors and Urban Pacific Investors
Main contractor	Bovis Lend Lease