The paper analyses the plurality of urban informal practices that characterize contemporary Italy in the sphere of housing, focusing on its complex connections with a variety of public institutions (e.g. laws, regulations, policies and practices). The paper discusses five cases of urban informality in Italy: the squatting of public housing in Milan; Roma camps in Rome; the borgate romane (large unauthorised neighbourhoods in the capital, which were built in the 1960s and 1970s and which have subsequently undergone a long and complex process of regularization); unauthorised construction, by the middle class, of second homes in coastal areas of Southern Italy; illegal subdivision of agricultural land as a standard mechanism for urban expansio...