Enrollments, building planning and the utilization of space is discussed and a contribution toward the development of a master plan for higher education in Illinois is made. The first section presents information regarding limitations or ceilings which institutions now have or plan to have on their enrollments, the additional enrollment capacities which were considered possible in the fall of 1962, projected enrollments to 1965 and to 1970 and related building plans for the same periods, and an estimate of the additional enrollments which will result from building construction by the state universities. The second section presents data on utilization of space by 56 institutions for total and permanency rating of that space, the functional use of space and total square footage by function, and the utilization of classrooms, laboratories, office space, libraries, and service and maintenance space. Section three contains further additions and procedures to be considered by the committee regarding physical facilities. Major spaces available in the physical plant are dealt with, both private and public institutions being represented. A graphical representation of the data regarding class size and classroom capacity for each institution, is included, together with graphs showing square feet per student clockhour of instruction. (RK)