About 509 Howard Street
509 Howard Street (also called Foundry Square III) is a proposed skyscraper set to rise in San Francisco's South of Market district. It will be one of four high-rise towers at an integrated site called Foundry Square. The tower will stand 500 feet (152 m) above street level. The skyscraper project is notable for exceeding the local 200 foot (61 m) height limit by a wide margin. The building, when built, will soar significantly taller than most buildings in the surrounding area.