The PreFab Eco Smart House was designed to an be industrialized level, following the idea of the "kit-of-parts model". In particular, the standard house model - CORE UNIT - can be extended following simple steps both horizontally and vertically - up to 2 floors. Its structural system allows multiple assembly options and the creation of different spatial arrangements, while the shell consists of a set of panels, which can be assembled and / or removed, giving the desired flexibility. The described system made it possible to explore forms of permanent residence. The latter opens a new and very promising field of research, as it could combine the advantages of prefabrication and the conventional housing model.