The proposed project is based on the external staircase that serves as a cover of the passage between the two houses and independent access to the first floor. The scale is to be realized as in detail so that between tread can enter the light beam and create natural settings oltrecché feed the tank with water lilies that acts as a buffer between the two internal bioclimatic homes. The move made in this way keeps the direct connection with the rear of the property in which you plan to build a patio surrounded by a pergola supporting sheets that provide shade. The spaces that are created on the ground floor are designed as private, those on the first floor, studio and atelier as public. In addition, the landing of the external staircase acts as a high terrace for sighting the views from the scale.