A great house is a large house or mansion with luxurious appointments and great retinues of indoor and outdoor staff, especially those of the turn of the 20th century (i.e., the late Victorian or Edwardian era in the United Kingdom and the Gilded Age in the United States). Examples include the English country house and the homes of various "millionaires' row" (or "millionaires' mile") in some U.S. cities such as Newport, Rhode Island. In Ireland, the term big house is usual for the houses of the Anglo-Irish ascendancy. By some reports, the summer homes of the wealthy at Newport averaged four servants per family member. There was often an elaborate hierarchy among staff, domestic workers in particular.

Great house is a term for a large residence and the associated household, especially in the context of the Victorian and Edwardian era.