The Roswell Butler Hard House is a house located at 815 W. First St. in Antioch, California. Roswell Butler Hard, a prominent early resident of Antioch, built the house in 1869. Hard was the first chairman of the Antioch town council, which originally met in his house; he also served as county sheriff and supervisor. The two-story Italianate house was built entirely from brick made in the city. It was split into smaller housing units after Hart's death; in 1979, the city of Antioch took ownership of the building, and it has fallen into disuse since.[2][3][4]