Local Law 84 is the starting point of New York City's building-energy system. It is the annual measurement step — the data that benchmarking produces is what feeds your building's energy grade and underpins Local Law 97 planning. If you own a large NYC building, this is the compliance task you face every single year.
Who has to benchmark
LL84 (as expanded by Local Law 133) covers:
- Individual buildings over 25,000 gross square feet;
- Two or more buildings on the same tax lot that together exceed 100,000 sf;
- Two or more condominium buildings governed by the same board that together exceed 100,000 sf.
What's required, and by when
Each year, owners must enter their building's energy and water use into the EPA's free ENERGY STAR Portfolio Manager tool and submit it to the City by May 1. The submission is for the previous calendar year, and it must include whole-building data — which usually means collecting tenant and common-area utility data. The City then makes much of this benchmarking data public.
The penalties for missing it
Benchmarking fines are modest individually but recur: $500 per quarter that a report is late, up to $2,000 per year. Penalties accrue at the quarterly deadlines (May 1, August 1, November 1, February 1) until a compliant report is accepted. The bigger cost is usually the missed insight — and the automatic poor energy grade that non-compliance triggers.
Why it matters beyond the filing
Benchmarking is not just a box to tick. The same Portfolio Manager submission produces your ENERGY STAR score and your EUI, which drive the public A–D energy grade posted at your entrance. And the year-over-year data is the raw material for understanding your Local Law 97 carbon trajectory. Good benchmarking data makes every other NYC compliance step easier; sloppy data undermines them all.
Turning the data into a plan
Where we add value is the step after benchmarking. A calibrated energy model built on your real benchmarking data turns a backward-looking utility report into a forward-looking plan — showing how your EUI compares to peers, where the waste is, and which measures will improve your grade and cut your LL97 exposure most cost-effectively.
Want more from your benchmarking data?
We turn LL84 benchmarking data into calibrated NYC energy models — pinpointing the measures that improve your energy grade and reduce your Local Law 97 carbon. Let's talk.
Get in touchThis article is general guidance and reflects information available at the time of writing. NYC requirements, thresholds, deadlines and fines are set by the City of New York and may change — always confirm current rules with the NYC Department of Buildings for your specific building.