The house has a square floor plan divided into asymmetrical quadrants that spiral up to a height of four stories. Four steps (which add 70 cm in height) separate one quadrant from the next. Installed at the intersection of the habitable walls that divide the interior is a spiral staircase with a central stairwell, regular steps and no landings. To move between one enclosed space and the next there are two routes: the stairs, which function as a diagonal shortcut that intersects the corners, and another gentler one that connects the centers of each enclosed space. In total there are twelve platforms at different levels, in which a rotation of 360 degrees is equivalent to a whole floor. Except for the base, which contains the earth of the back garden, this wooden house is supported on the central staircase, a robust entity of folded slabs and four reinforced concrete columns that rise through the entire height of the volume. At its base, the center of the staircase coincides with the diagonal entrance to the house. The massive presence of this composite, disproportionate column is contained by an almost provisional scaffolding of beams and columns of treated wood faced with paneling on both sides. The outer façade is lined with a ventilated sheet of boards and lightly framed glass panels.