Scaling up Multifamily Energy Efficiency Programs: A Metropolitan Area Assessment is a March 2013 report from the American Council for an Energy-Efficient Economy. ACEEE has launched a multi-year project to expand customer-funded energy efficiency programs targeting multifamily housing. the purpose of this report is to provide a baseline assessment of the current landscape of multifamily energy efficiency programs in the 50 metropolitan areas with the largest multifamily housing markets. The report identified the specific opportunity in each metropolitan area to scale up multifamily programs.