The state of New York requested that the U.S. Department of Energy's (DOE's) Building Energy Codes Program (BECP) provide an analysis of the impacts of adoption of ASHRAE Standard 90.1-2007. New York State is unique among states in requiring a ten-year payback for energy code measures. BECP based this analysis on the results of a nationwide, state-by-state code comparison for DOE. This analysis indicates that the adoption of ASHRAE Standard 90.1-2007 is cost-effective under New York’s requirements for all buildings in New York.