It is a way of conceiving the architectural design sustainable, seeking to optimize natural resources and building systems so as to minimize the environmental impact of buildings on the environment and its inhabitants. Considering the weather, hydrography and ecosystems of the environment in which the buildings are built for maximum performance with the least impact. Efficiency and moderation in the use of building materials, giving priority to low energy versus high energy content The reduction of energy consumption for heating, cooling, lighting and other equipment, covering the remaining demand with renewable energy sources Minimizing the overall energy balance of the building, comprising the phases of design, construction, use and end of life. Compliance with the requirements of hydro-thermal comfort, health, lighting and occupancy of buildings.