The Flood Building is a 12-story highrise in the downtown shopping district of San Francisco, California. It is located at 870 Market Street on the corner of Powell Street, next to the Powell Street cable car turntable, Hallidie Plaza, and the Powell Street BART Station entrance. Designed by Albert Pissis and completed in 1904 for James L. Flood, son of millionaire James Clair Flood, it is one of the few major buildings in San Francisco that survived the 1906 earthquake and fire. As of 2024, it is still owned by the Flood family.