Houses are an important type of social group within the Radch which serves as an extended family. Most people are members of one of their parents' houses from birth, but it is also possible to join a house my adoption, and not all members of a house are necessarily blood relations.
House loyalties are often a significant determining factor in the political and social beliefs of individuals. Houses vary in wealth and prestige, with wealthier houses offering clientage to those from smaller houses.