James C. Flood Mansion is a historic mansion at 1000 California Street , atop Nob Hill in San Francisco , California , USA . Now home of the Pacific-Union Club , it was built in 1886 as the townhouse for James C. Flood , a 19th-century silver baron . It was the first brownstone building west of the Mississippi River , and the only mansion on Nob Hill to structurally survive the 1906 San Francisco earthquake and fire . It was declared a National Historic Landmark in 1966
1906 San Francisco earthquake
1906 San Francisco earthquake
James C. Flood Mansion