The Shell Building is an office tower in the Financial District of San Francisco, California. Shell Oil Company occupied the building until the 1960s. The 28-story, 115.22 m (378.0 ft), building is located at 100 Bush Street, at Battery Street. Its architectural style is Gothic Moderne, Moderne and Art Deco. The architect was George W. Kelham and the building was built in 1929. There are castings of shells that decorate the cornice on the upper levels as well as shell designs in the lobby floor and decorative grill at the front of the building.