Abstract: A housing system designed to be transported as one package has first and second sections each including a floor and a side wall disposed perpendicularly to one another. By proper arrangement, the sections, which are of substantially equal size, can be fitted into one another such that the floor and wall of each of the sections covers a surface of a substantially rectangular parallelepiped. In a similar manner, third and fourth sections, which are equal to one another in size and similar in construction to the first and second sections, but smaller in size than the latter sections, are arranged so as to form a second substantially rectangular parallelepiped which is received within the parallelepiped formed by the first and second sections. One of the first and second sections cooperates with one of the third and fourth sections to form a housing unit, with each module including a pair of such units.