The sustainable design is to be understood in an economic sense (there must be a lasting relationship between resources used and resources available);
social (must resist a equilibrium of life between people and social classes that does not hurt human dignity and solidarity);
environmentally (must be preserved and favored the natural conditions relevant to the ideal fulfillment of the life of all species of animals and plants);
cultural (there must be preserved and fostered cultural particularities in order to create local identity and difference).