The housing units share the urban and rural vision of the project . They have double orientation enabling cross ventilation and view. The houses are organized by means of a central core of bathrooms that divides them into day and night spaces. The daytime areas face the inner plaza and have large windows to profit from the valuable sunlight in Asturias, while the night areas, with more controlled openings and equipped with blinds, face the city. The housing units were generated adding up consecutive 2.60 meters modules , providing one, two, three and four bedroom units, thereby responding to the multiple types of apartments required. The terrace, one meter deep, is presented as a visual and spatial extension of the apartment. It is intended to serve as an exterior gallery made of wooden planks bordering the entire inner perimeter of the building. A radiant floor system with centralized heat production and individual distribution has been installed, completed with a simple home domotic system which, among other features, allows control of the facility. The building also captures solar energy through the panels installed on the flat roofs to support partly the production of hot water. The structural underground system consists of a large slab of foundation and a structure of concrete walls and pillars. Above the ground the system is mixed, based on one-way concrete slabs on standardized tubular supports and steel bracings which allowed faster implementation, and greater economy and clearness of the space.