Factors for the planning of functional, economical and safe laboratory facilities are discussed, with emphasis on the economical results of planning for a specific purpose and for the specific needs of each occupant. A questionnaire is suggested as a useful tool for determining requirements. Other areas for consideration include--(1) laboratory furniture, (2) benchtop and floor standing equipment, (3) utilities, and (4) special problems such as controlled environmental chambers, fume hoods and special cabinets. Four versions of a laboratory plan for 24 students are given, with reasons for the final choice. (RW)