An unfoldable modular living unit includes one or more folding modules having a bottom, pitched roof elements forming the roof and the side walls, and two opposing facades, front and back. Each one of the modules includes a folding and collapsible structure having two adjacent rigid sides or walls hinged to each other through a hinge or a fixed knot, a third foldable side or wall hinged to the first two rigid sides or walls, and at least one intermediate plane hinged to one of the pitched roof elements and suited to be constrained to the other pitched roof element.