con·di·tion Five plots of sloped land with 1500 sqm each. op·por·tu·ni·ty Maximize occupation of plots and develop single family housing. so·lu·tion Four houses, attached two-by-two, with 420 sqm of area each. Total of houses, 20. Retaining walls create two 3m height difference platforms, service and parking in front on level 0 with family space, social space on level 1 and private space on level 2.