The 'Tierra Estella' school is one of the latest educational centers that AH asociados has designed for the government of Navarre. The building has been designed under environmental criteria (energy certification rating B), complying with the brief and established requirements, and avoiding the saturation of the building plot within the immediate surroundings. The initial design of the center took into account the possible extension by an additional floor allowing for this eventuality undermining neither the general functionality nor the structure of the building. Posteriorly, this proposed extension was built within a single phase, resulting in a building that is comprised of semi-basement, ground floor, first and second floors. Equally, a sports centre was designed that contains basement, ground and first floors and that permits a further floor if required in the future. The building is diaphanous and has an inverted, practicable roof that allows for sports activities.