LL97 Copilot · an AEQUARA tool
2026 is the first Local Law 97 penalty year.
Know your number before DOB tells you.
2025-emissions reports were due May 1, 2026; the grace window ended June 30, 2026, and DOB is issuing violations now. The penalty is $268 per ton of CO2e over your building’s cap, every year — and late filing accrues $0.50/sqft/month. If you need more time, the extension window (BEAM portal, $60 fee) is open until August 29, 2026.
Who this is for
Co-op and condo boards, self-managed buildings, and small owners with buildings over 25,000 sqft. Under 25,000 sqft as a single building? LL97 likely doesn’t cover you — the calculator will say so.
The 2030 cliff
Caps drop sharply in 2030 — offices from 0.00846 to 0.00453 tCO2e/sqft. Many buildings that pass today fail 2030. The calculator shows both periods side by side.
Free penalty estimate
Other property types, district steam, and #2/#4 fuel oil are covered in the paid report — their 2030 coefficients aren’t published consistently enough for us to show a self-serve number we’d stand behind.
Runs entirely in your browser — nothing is sent anywhere unless you choose to leave an email or buy the report. This is an estimate from your inputs; official compliance uses your LL84 benchmarking data.
What the $149 report is — and isn’t
Four independent AI labs (Anthropic, DeepSeek, Google, Meta-Llama via Groq) each assess your building from your intake; a synthesis pass drafts one action report: situation assessment, extension-filing guidance for the Aug 29 deadline, the good-faith-effort pathway, decarbonization measures ranked by typical $/ton impact for your fuel mix (qualitative planning ranges — not quotes), RECs/offsets limits, and a filing checklist.
Honest scope: LL97 filings must be certified by a registered design professional (PE or RA). We prepare analysis and checklists; we do not certify, and we do not replace your engineer. This is not legal or engineering advice. Calculator results are estimates from your inputs — official compliance uses your LL84 benchmarking data. Questions? hello@aequara.ai — a human reads it.