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Local Law 87, as part of the Greener, Greater Buildings Plan, requires all buildings larger than 50,000 square feet to undergo energy audits and retro-commissioning. The process informs building owners of their energy consumption, gives them a greater understanding of their building's overall performance, and drives the adoption of energy efficient systems. Energy audits are the surveys and analyses of energy use and retro-commissioning is the process of ensuring correct equipment installation and performance. 

These analyses and processes must be undergone once every ten years and reported electronically as an Energy Efficiency Report (EER) to the Department of Buildings. The completed EER consists of Professional Certification Forms and Data Collection Tool Spreadsheets. 

For more information, see "Related Resources" in the right-hand sidebar, or visit the PlaNYC website here.


Welcome to the Building Energy Exchange! Located in downtown Manhattan, we’re a resource center dedicated to advancing efficient energy and lighting design in buildings. Explore this site for helpful case studies and reports, check out our calendar for a wide range of activities and events, and follow our lively blog, Insight. Our site is growing all the time—drop us an email to contribute or comment!