Abstract: A foldable house assembly that minimizes transportation size and assembly time is provided. The assembly includes a rectangular base, a front wall, a rear wall, two side walls pivotally attached to the base, and two roof halves that are pivotally attached to the two side walls. Each of the walls and roofs has a panel and reinforcements fixed to the panel. Hinges are used between reinforcements for pivoting, and bolts and nuts are used for assembly of the walls and roofs. The panel extends over the reinforcements to provide sealing effects. In a second embodiment, the assembly is divided into a center unit, a left unit and a right unit. The wall between the center unit and the left unit, and the wall between the center unit and the right unit are omitted. The assembly may be extended by inserting center units as needed.