The residence of the lord was Sanda-jo Castle with ninomaru (second bailey), ochaya (rest house), arms store house and ammunition storage built in premises of today's Arima High School campus (the site of Sanda-jo Castle) and mitachi (feudal lord's office) built in the premises of existing Sanda Elementary School.
居城は三田城で、現在の有馬高校校舎敷地（三田城跡）に二の丸・御茶屋・武器庫・煙硝蔵などを設け、現在の三田小学校敷地に御館が築かれた。