Abstract: A tubular modular unit having an integrally formed outer structure, floor, and ceiling is provided which may be directly supported upon the ground. A plurality of the tubular units may be placed one on top of another in a stacked configuration to provide for a large capacity housing complex. Cylindrical units are disclosed as being the preferred embodiment, wherein sanitary chambers and a water tank are provided interiorly of the unit. End towers which provide lateral support for a stacked configuration of the units are also utilized as a source of water supply and sewage disposal. Tubular units having elliptical, rectangular, etc., cross-sections may also be advantageously used within the principles of the present invention.