Last verified: August 22, 2026. By Will Tygart. Operations calendar for owners and PMs — not a legal instrument. Deadlines move by DOB service notice; re-check the current PDF before you file.
If you operate covered NYC buildings, put three dates on the portfolio dashboard and treat everything else as runway: May 1, June 30, and — if you actually applied — August 29. The 2030 limit cliff is real, but it does not excuse a missed 2026 file.
2026 — filing year
| When | What | Ops note |
|---|---|---|
| May 1, 2026 | LL97 report for calendar-year 2025 emissions (typical due date) | Same season as LL84 / LL88 May 1 patterns. Pay the fee in DOB NOW, share data in ENERGY STAR Portfolio Manager, submit in BEAM with an RDP. |
| May 1 → June 30, 2026 | 60-day grace window used in city communications | Do not treat grace as a plan. |
| June 30, 2026 | Last day commonly cited to apply in BEAM for the $60 extension | Extension is an action, not automatic. |
| August 29, 2026 | Extended LL97 filing date if the extension was properly obtained | Keep the ticket and approval artifacts. |
| October (LL33 / energy grade) | Energy grade label posting window | This is a public / tenant moment, not only a compliance chore. |
| December 31 (LL87, if in cycle) | Energy efficiency report cycles for buildings in-year | Check whether your BIN is in cycle. |
Walkthroughs already on this site: June 30 deadline / extension, DOB NOW + ESPM + BEAM, and the LL84 / LL88 / LL97 / LL33 stack.
2027–2029 — build the 2030 runway
- Treat annual filing as a recurring ops process, not a project
- Metering, ESPM hygiene, mixed-use factor discipline
- Sequence CapEx against 2030 cap-tightening scenarios
- Keep good-faith files: decision memos, RDPs, vendor scopes
- Document disaster impacts that affect energy evidence
2030 — limit cliff
January 1, 2030 is when tighter emissions limits by property type take effect for the next compliance regime. A building that looks fine under 2024–2029 factors can face a large annual overage in 2030 at the same energy use. Run the $268 calculator in both periods before you fund a one-year story.
How to use this in a PM shop
- Assign a named human per BIN for filing season
- Put May 1 / June 30 / August 29 on the portfolio dashboard
- Link each BIN to calculator output plus RDP contact
- Review October grade posting as a tenant/public moment
- Keep non-filing math separate from overage math — see the non-filing estimator
Sources this pass: NYC Accelerator LL97 page (2026 extension), DOB LL97 page, Feb 27 2026 sustainability deadline service notice as cited by Accelerator, and the live BCESG deadline walkthrough.
Related reading: LL84/88/97 compliance stack, June 30 deadline, and LL97 fines calculator. Sister hubs: Restoration Intel, Healthcare Facility Hub, Continuity Hub, Risk Coverage Hub, and Tygart Media.