If, on the one hand, the condition of widespread deterioration that seems to omologate our cities from the center to the periphery is the declaration of a contemporary inability to retrieve the ancient relationship between nature and built that presided over the founding of the city, on the other hand, the global crisis presents us a impressive generational data: entire sections of society are, at the same time, excluded from the target of popular houses and private of the economic capacity to access the market. The project of architecture should regain that sense of ethics and social that can represent, today, a proper and necessary disciplinary contribution attempt to the solution of a much more complex question. Precisely because in a time of deep crisis, any construction, from small urban design element until recovery or the construction of a new neighborhood, sees grow its value exponentially. Not a case that we record the progressive growth of interest in a new form of housing: the social housing. A "sustainable" alternative to the popular houses, the Social Housing combines the low environmental impact at the high energy performance and content of construction's cost, permeating of a logic ethics and a strong social connotation an increasing number of financial transactions that involve collaboration of public and private operators. In the same line it is also places the initiative of european competition "Housing contest" which was attended, with success, by this project.