This study provides some insight into space per worker trends that are critical to any model forecasting future office space demand. A framework of analysis is provided that tries to bring goals and aspirations of cost conscience space planners into reality by considering lease terms, employee churn or turnover, time to fill positions, the growth rate of the firm, and other uncertainties that affect space utilization rates, for example, policies towards standardized space or sharing non-dedicated space or the types of space utilized by the firm including the need for collaboration. Culture, cost, firm size and industry type considerations are compared but the focus is upon the space per worker trends that affect the ability of a firm to use space efficiently as well as affect all future forecasters of office demand based on employment projections. Some consideration is given to alternative workplace strategies as well as the effect of natural light, better ventilation and better temperature control on productivity.