Semi-detached housing consists of pairs of houses built side-by-side sharing a party wall, like corner buildings built at the end of a row of houses . The context is essential for these houses, not only by the obvious connection with the neighboring houses, but mainly because the positioning has its own logic that is not usually derived from a logical orientation towards the sun. This type of housing, more than other types, requires a specific solution, they are becoming a kind of balancing act.