The development of the building project and its adaptation to requirements imposed by site, time schedule, and the accelerator is described. Included are such matters as the allocation and organization of building space in relation to accelerator operation and research function, provision for possible future changes, and the influence of the selected site and its topography on the building design. Factors that determined the choice of materials are discussed. The types of utilities for present and planned future needs, especially the high-purity water systems, are summarized. A brief description is given of illumination and building colors.