This paper analyzes the responsibility of urban regulations in the construction of the right to the city, supporting human dignity in the age of the “urban civilization”. For that purpose it is analyzed three urban sectors, segregated and fragmented of the metropolis of Buenos Aires assessing how paradigmatic regulatory frameworks (as land use Law 8912 and municipal planning codes) influence the shape of urban-housing typologies developed by the market, subdividing plots, the interventions of the state, as housing complexes and the spread of informality. The article reveal how planning instruments that far from assuming their responsibility ensuring human dignity tends to legitimate fragmentation and duality between formal and informal cities, favoring speculative investment capturing urban value instead of the access of the poor to decent housing and the city.