In a narrow and difficult access plot in a suburb of Madrid we have designed a semi-detached house that seeks the maximum open space in the plot with a minimum building occupancy, in order to have the biggest garden. The house is organized on three levels connected by a central staircase that will give access to each of the bedrooms distributed on its both sides. The garden is the center of the space because it interacts continuously with the rooms of the house in different way each level.