The project develops two terraced single-family homes for two clients who decided to join forces building in an old house in disuse. The plot is oriented south and enjoys a privileged situation in front of the pine grove of the pasture. It is actually made of two narrow and deep adjoining plots (8.50 x 33 m each) that have access from the street on both fronts with an uneven floor between one access and the other. The housing program is developed in four floors; semi-basement and ground floor solve the public and service part with differentiated access, and the first and second floors of rooms, are adapted specifically to the needs of each family. The housing solution is supported by two operations: the perforation of the volume by two patios that fill the solid capacity with light, and the alternation of full and empty plans that allow all rooms of the house to enjoy an exterior at height. The result has a strong three-dimensional component that is enriched with multiple diagonal views and alternate sequences between interior and exterior. The light floods the whole house and reinforces the effect of continuity that is pursued by unifying the finishes. Through a succession of voids, patios, terraces and rooms a perforated volume is formed in which it is not immediate to guess what is outside and what is inside.