To live in a city or in a country side could identify different architectural types and specific morphological blocs, but, on a sociological point of view, housing complexity, in the urban era, takes up common values and necessities, even in the city that in the country side; from those emerges a sort of "community necessity". The question isn’t to live in the city or in the country side, but to live in-common in a sustainable context, that means a new form of housing referring to a type of society, that respect and preserve the resources (natural, human, cultural, ecc.) for the next generations.
Keywords: Housing, urban, rural, sprawl, community, sustainability.