Benchmarking Help Center - Information and Assistance

The New York City Benchmarking Help Center provides information, assistance, and answers to questions about NYC Local Law 84 (LL84) of 2009. The Benchmarking Help Center's goal is to help New York City increase compliance, improve data accuracy, and assist new building owners to benchmark, enabling New Yorkers to use energy and water responsibly and prepare for a more sustainable future.

The Benchmark requirement requires owners of large buildings to annually measure and report their energy consumption through a process called benchmarking. These building owners must use the Environmental Protection Agency's online Portfolio Manager to create the report. The report deadline is May 1 each year. Failure to benchmark by May 1 will result in a violation and financial penalty.

The Department of Buildings accepts challenges to violations issued for failure to comply with the Benchmarking requirement. Building owners can challenge the violation within 30 days from the violation date.

For more information, subscribe to the Greener, Greater Buildings Program (GGBP) Digest for updates on Benchmarking (LL84) by sending an email to with "subscribe" in the subject line.

You may contact the Benchmark Help Center by visiting, sending an email to, or by calling (212) 566-5584.