Frequently Asked Questions
Straight answers on NYC compliance, decarbonization, and how BES engages.
Which buildings are covered by LL97?+
LL97 covers most NYC buildings over 25,000 sq ft, as well as certain multi-building tax lots totaling more than 50,000 sq ft. Rent-regulated and affordable housing follow a prescriptive alternative pathway.
What is the LL97 fine formula?+
Exceedance × $268 per metric ton of CO2e per year. Emissions are calculated from LL84 data using DOB-published emission coefficients for each fuel.
When is the first LL97 filing due?+
The first annual LL97 emissions report was due May 1, 2025, covering calendar year 2024. Filings recur every May 1 thereafter.
How does LL84 relate to LL97?+
LL84 benchmarking data is the input LL97 uses to calculate emissions. Errors in LL84 directly cause errors in LL97 exposure and letter grades.
Do I need an ASHRAE Level II audit if I already did LL87?+
Not until your next 10-year cycle. However, most LL87 audits pre-2020 do not contain the granularity needed for LL97 planning; BES typically layers a targeted decarbonization study on top.
Can offsets or RECs be used to comply with LL97?+
Yes, within limits. Purchased GHG offsets are capped at 10% of the emissions limit; RECs must be from resources deliverable to NYC Zone J. BES structures both under audit-defensible documentation.
How does BES engage with clients?+
Most engagements start with a fixed-fee LL97 exposure review or LL84 recovery. Ongoing compliance and decarbonization services are structured as annual retainers or capital project advisory.
Does BES file with DOB on my behalf?+
Yes. BES is a NYC DOB Registered Energy Auditor and files LL84 benchmarking, LL87 EERs, and LL97 annual reports as agent of record.