This session will describe the impact of adopted International Energy Conservation Codes on energy usage analysis in commercial buildings. We will discuss levels of energy usage assessments, ranging from preliminary through ASHRAE Levels I, II and III, which may be performed to develop options for energy reduction and identify benchmarks of an existing commercial building’s energy usage. Using the ENERGY STAR Portfolio Manager, we will demonstrate how a commercial building may be benchmarked versus a peer group of similar facilities by use and geographic area during an energy usage analysis with the goal of providing guidance on various energy cost reduction measures identified in the analysis.