The goal of this chapter is to chronicle the history and evolution of the fi eld of post-occupancy evaluation (POE) as it evolved into building performance evaluation (BPE), and to identify major milestones in its development. This chapter outlines the progression of evaluation eff orts. This was undertaken by categorizing evaluations by building types, ranging from residential housing to offi ces, hospitals and government facilities, or just about any facility type for that matter. Findings included: large organizations with repetitive building programs were the major players in POE/BPE projects; major concentrations of POE/BPE eff orts were found in English-speaking countries like the US, UK, Australia, New Zealand, and Canada. Major outcomes and benefi ts of POE/BPE case study evaluations were the development of guidelines for the planning and design of future buildings. The implications of the evolution of POE/BPE are increased sophistication of methodologies and system-wide applications in a growing number of countries around the world.