 When it opened on May 30, 1925, The Pacific Telephone Building was San Francisco's first significant skyscraper development, and was the tallest building in San Francisco, until the Russ Building matched its height in 1927 at the time of its completion.The building was the first high-rise south of Market Street, and along with the Russ Building, remained the city's tallest until it was overtaken by 650 California Street in 1964.It was the first high rise located on the west coast to be occupied solely by a single tenant.