Abstract: Modular living space constructed from ten-foot diameter cylindrical continuous pipe stock of predetermined unit lengths. Depending upon the amount of desired total living space, multiple units may be coupled end-to-end via coupling bands and extension members. The interior walls of each unit are of conventional rectilinear design and are supported from a plurality of nailing member containing lengthwise channels attached to the interior periphery of each cylinder. Primary lengthwise channel members are secured at each quadrant and angle channel members are used at each corner. Window sashes mount to drip edge containing sleeves fitted through the interior and exterior walls. End walls are secured to flanged collar members fitted within the cylinder.