If to try to make a more efficient use of the land, we worked with row houses, even if we reduced the width of the lot until making it coincident with the width of the house, and furthermore, with the width of a room, we were able to host just 66 families. The problem with this type is that whenever a family wants to add a new room, it blocks access to light and ventilation of previous rooms. Moreover it compromises privacy because circulation has to be done through other rooms. What we get then, instead of efficiency, is overcrowding and promiscuity.