The objective is to design a mid rise apartment building that has to respond to three main directives: economical viability, structural efficency and to be a proper addition to the neighborhood rich architecture. That is why we came with the idea of developing not a classical apartment building, but rather conceive the project as six houses piled together in this small site. We figured that if we proposed each apartment as a two story house, with terraces that have at least 32 sqm each and a structure effciently enough to support future alterations in it´s interior, we would be adding value to the project. The building as a whole acts as a contention wall for the topography and creates a platform for the upper apartments that is used to create a perimetral yard that sorrounds them and conforms different spaces for different uses, including a private swimming pool for those units which is inserted in the ceilling an has a reinforced glass on one of its sites looking to the city. Each house is comunicated by a central vertical circulation, that was enclosed by a five story concrete bricks facade that acts as a bris soleil "bathing" the access of each unit with a very special luminosity. The use of concrete, wood and steel as principal materiality was a deliberate decision in order to give the project it´s own characteristic and as a way of taking distance of the usual solutions used in residential apartments.