Fundamental to assessing the future direction of commercial property markets is a clear understanding on the demand for space. This paper examines new space occupiers in three leading Australian property markets, identifying their motives and rationale for the new space and the current macro economic and micro economic influences in their decision making process. Knowledge on the rapid changes in business environment is now a requirement to comprehend the causes and patterns of new space demand and the prospects for commercial property markets. This paper shows structural market analysis is the framework for understanding the complex dynamics of the space demand market and the backbone to future research on commercial property markets.