The performance takes the complete rehabilitation of all existing homes, so that they have the sanitary conditions of habitability regulations, including efficient ventilation by double orientation, performing recovery using original house in first floor of the property and the elimination of previous slum on the penthouse floor and allowing proper accessibility to the building by incorporating an elevator. Widely measures energy efficiency and sustainability and the acquisition of "Energy Performance Certificate" by the Basque Energy Board (EVE), proper insulation of homes and incorporation of aluminum frames with thermal break and double glazing also introduced with low-emissivity glass, installation of photovoltaic solar panels to produce electricity and solar thermal collectors for domestic hot water and heating, central condensing boiler natural gas, installing a heating system "soil radiant "in homes, saving systems: dual-flush toilets, thermostatic faucets, lighting and presence detection timer in common areas, energy saving lamps, thermostats, motorized blinds and home automation central system. THE updating won the prize Cities Summit 2007 in Madrid SIMA fair.