Building Energy Performance Analysis


Two hands are visible in from of two computer screens, keyboards, a phone and a flashlight. Shelves with supplies are in the background.

Each year, DEM works with City agencies to benchmark the energy performance of approximately 3,000 municipal buildings that are at least 10,000 gross square feet, as per the requirements of Local Law 84 of 2009. To perform the benchmarking process, DEM analyzes energy and building data using the U.S. EPA Portfolio Manager tool, which allows users to compare the energy performance of their buildings to the national median energy usage of buildings of similar characteristics. DEM uses energy benchmarking to gain detailed insight into buildings’ energy use and monitor energy performance relative to peers and over time. DEM also use the benchmarking results to identify facilities that are operating inefficiently and should be prioritized for energy conservation investments.

On September 1 every year, DEM submits benchmarking results to the Department of Finance (DOF) for publication. The City’s annual benchmarking report includes source energy use intensity (EUI), total emissions, and Energy Star ratings (as available) for all benchmarked properties. DEM also provides agency staff with access to agency-specific Portfolio Manager accounts that enable them to track building and portfolio-level performance over time.

Read the latest New York City Government Building Energy Benchmarking Report

Visit Energy Star® Portfolio Manager

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Energy Audits

An individual with a tablet stands in front of a fan motor auditing the blowers performance.

DEM performs energy audits for City buildings 50,000 gross square feet or larger to identify energy savings opportunities and comply with Local Law 87 of 2009. The findings from these audits are summarized in Energy Efficiency Reports (EERs), which DEM shares with the Department of Buildings and the impacted agencies. From FY08 to the end of FY19, DEM has completed 938 audits and filed a total of 490 EERs with the Department of Buildings (“DOB”).

Read the latest Energy Audits and Retro-commissioning Annual Report

Read the DOB Rule 103-07 on Energy Audits and Retro-commissioning of Base Building Systems

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