Energy benchmarking provides a detailed understanding of building energy use that allows the City to prioritize buildings for energy efficiency investments and to monitor building performance over time. The benchmarking process measures the total electricity, natural gas, steam, and fuel oil consumed in a building and adjusts for other factors – location, building type, year of construction, number of workers, gross square footage, and other operational data. Benchmarking allows for comparisons among buildings and helps identify which facilities are operating inefficiently. 

In April 2010, DEM completed the first round of energy benchmarking for almost 3,000 municipal buildings in partnership with 28 City agencies. The City’s building portfolio is comprised of a wide range of building types, including libraries, police stations, firehouses, schools, courthouses, health, community, and family centers, and government offices. On September 1, 2011, DEM submitted the latest benchmark results for City buildings to the Department of Finance (DOF) for publication as part of the City’s Greener, Greater Buildings Plan. These results can be found on the DOF website.

In compliance with Local Law 84 of 2009, benchmarking results are reported for all City buildings that are more than 10,000 gross square feet that are owned by the City or for which the City pays all or part of the annual energy bill. The report shows the current source energy intensity (i.e. energy utilization index) and an Energy Star rating generated by the U.S. EPA’s Portfolio Manager benchmarking tool for each City building. The Energy Star tool compares the energy use of each building to that of the national average energy use of similar buildings. This report also shows the total greenhouse gas emissions for each facility.

Data used to generate this report were collected and reported by several agencies. The information in this report is subject to change due to data quality improvements, energy efficiency and conservation efforts, and changes in building use over time.