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Avoid $3,000 Fines: LL87 Energy Audit Playbook for NYC Owners

October 7, 2026
Avoid $3,000 Fines: LL87 Energy Audit Playbook for NYC Owners

If your commercial or large multifamily building exceeds 50,000 gross square feet, you likely owe the city an Energy Efficiency Report this filing cycle, and the deadline is December 31. The first move is engaging a New York State licensed PE or RA, or a DOB-registered energy auditor, and scheduling fieldwork now rather than in the fall, when missed deadlines trigger real penalties.

TL;DR:

  • Buildings over 50,000 square feet must file an Energy Efficiency Report by December 31, with early planning and engagement of a licensed professional reducing the risk of penalties.
  • The filing cycle depends on the building's tax block digit, which determines the specific year for submission within a ten-year rotation.
  • Exemptions exist for class 1 residential buildings, ENERGY STAR or LEED-certified properties, and buildings with recent substantial rehab, alongside available deferrals for new or recently renovated buildings.
  • The report must include an ASHRAE Level II audit, retro-commissioning documentation, and certifications signed by qualified engineers, with fees ranging from $145 to $375.
  • Starting the process 8 to 10 months in advance and maintaining organized records significantly lowers the risk of rushed, low-quality submissions or penalties.
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Table of Contents

Who must comply, common exemptions, and when to seek a deferral

Local Law 87 covers buildings over 50,000 gross square feet, and the filing year is not universal: it is tied to the last digit of your building's tax block number, which DOB guidance assigns on a rotating ten-year cycle. Confirming your tax block digit against the covered buildings list is the first task for any compliance team, since filing in the wrong year wastes a full audit cycle.

Not every large building owes a full report every ten years. Several carve-outs exist:

  • Class 1 residential buildings (one, two, or three-family homes) are not covered under LL87.
  • Buildings that already hold ENERGY STAR certification or LEED certification within the applicable window may qualify for streamlined or simple building filings.
  • A "simple building" designation can reduce the scope of required testing for lower-complexity properties.

Deferrals are available under specific conditions, most commonly when a building is less than ten years old or has undergone substantial rehabilitation, and when the owner can document NYCECC compliance from recent construction. Deferral applications follow the same filing window as a standard EER, so owners weighing eligibility should start that conversation with their engineer well before the fall deadline crunch, not after.

What the Energy Efficiency Report contains and who can certify it

An EER is not a single document. It bundles several required pieces, and DOB expects each one uploaded correctly before the filing is considered complete. The energy audit report must meet at minimum ASHRAE Level II scope and be submitted as a PDF.

  • The retro-commissioning report, also submitted as a PDF, documenting current operating conditions.
  • EERC1, the owner's certification form.
  • EERC2, the registered design professional's certification form.

An EER filing fee runs from $145 to $375 depending on the submission type. DOB fee guidance sets the initial EER or deferral application at $375, extension requests at $155, and amendments at $145, with payment handled through DOB's email and payment instruction process after initial review.

Only a New York State licensed PE or RA, or a DOB-registered energy auditor or retro-commissioning agent, can certify the audit content and sign EERC2. Administrative staff may enter data, but the underlying findings and sign-off require a qualified professional of record.

Timeline and deadlines: project planning to avoid late filings

Every EER is due December 31 of the calendar year matching your building's tax block final digit, and that date does not move for scheduling conflicts or contractor delays. Working backward from that deadline keeps a project on track:

  1. Confirm your filing year and covered status at least 10 to 12 months ahead, using your tax block digit.
  2. Engage a qualified PE, RA, or DOB-registered auditor 8 to 10 months ahead to allow for scheduling.
  3. Complete site surveys, equipment testing, and operator interviews with 4 to 6 months of runway before submission.
  4. Finalize the Audit Template, retro-commissioning workbook, and EERC forms with at least 6 to 8 weeks for DOB preliminary review.
  5. If you need more time, file an extension request by October 1 of the filing year; LL87 guidance limits how many extensions a building can receive, so this is not a repeatable fallback.

Owners who start engineering outreach in the spring consistently avoid the fourth-quarter scramble that leads to rushed, lower-quality reports.

Preparation checklist: documents, staff, and site tasks before the audit

The quality and speed of an LL87 audit depends heavily on what an owner has ready before the engineer arrives. A disorganized building with no service records turns a two-week audit into a two-month one.

  • Confirm your BIN, BBL, and tax block digit against the DOB covered buildings list before scheduling anything.
  • Gather maintenance logs, equipment inventories, as-built mechanical drawings, and at least 12 months of utility billing history.
  • Pull submetering data if your building has it, since it speeds up load analysis significantly.
  • Plan site access windows for testing, operator interviews, and verification of control set-points and run-time schedules.
  • Designate one internal point of contact who can answer questions quickly during fieldwork and document review.

Data entry into the DOE Audit Template is often handled by administrative staff or the consultant's support team, but the underlying audit findings and certifications must still come from the licensed RDP or DOB-registered agent managing the project.

Pro Tip: Keep a standing folder of equipment nameplate photos and service tickets year-round so your LL87 team never has to chase down basic inventory data during a compressed filing window.

Preparation checklist: documents, staff, and site tasks before the audit — overview diagram

How to file using the Audit Template, EERC forms, and DOB review

Filing runs through the U.S. Department of Energy's Asset Score platform, which hosts the web-based Audit Template that DOB requires for LL87 data entry. Registration happens directly on the Asset Score site, and your project team selects the Audit Template module for New York City submissions.

Once the audit and retro-commissioning work are complete, the submission package includes:

  • The ASHRAE Level II audit report, uploaded as a PDF.
  • The retro-commissioning report, uploaded as a PDF.
  • The signed EERC1 owner certification form.
  • The signed EERC2 professional certification form.

After uploading these documents to the Audit Template, your team submits the filing to the city and emails confirmation to LL87@buildings.nyc.gov. DOB performs a preliminary review, then sends payment instructions once the filing passes initial screening. If DOB requests corrections, amendments go through the same email channel, and a $145 amendment fee generally applies.

Common pitfalls and practitioner tips to reduce risk

Most LL87 problems trace back to timing and scope, not technical complexity. The same mistakes recur project after project.

  • Hiring an engineer in November for a December 31 deadline, which leaves no room for testing delays or DOB review comments.
  • Submitting incomplete equipment inventories, forcing the audit team to reconstruct data during fieldwork instead of analyzing it.
  • Mixing tenant-owned systems into the base building scope, which DOB FAQ guidance explicitly excludes unless a long-term net lease applies, inflating both cost and the resulting ECM list.
  • Losing track of prior filing documentation, which matters since the city can request records and may trigger a site inspection.

We recommend maintaining year-round system logs rather than reconstructing five years of service history under deadline pressure, centralizing all building records in one place your consultant can access immediately, and appointing a single internal owner representative for the entire engagement. Using one qualified engineering team for both the audit and the retro-commissioning work, rather than splitting the two, avoids the fragmented data handoffs that commonly cause rework.

Pro Tip: Ask your engineering team to flag tenant-versus-base-building boundaries in writing before testing begins, so scope disputes never surface after the fieldwork is done.

Extensions, deferrals, penalties, and steps if you're already cited

Extension requests must be filed by October 1 of the filing year, and LL87 guidance limits the number of extensions available per building, so this is not a repeatable safety net. Deferrals apply when a building is under ten years old, has undergone substantial rehabilitation, or can document NYCECC compliance from recent work.

Missing the deadline carries real cost. A Class 2 violation for failing to file an EER by December 31 runs $3,000 for the first year and $5,000 for each subsequent year, according to DOB penalty guidance, and DOB will not accept a late submission until outstanding penalties are resolved.

  • If already cited, resolve the penalty balance before resubmitting, since DOB holds acceptance until payment clears.
  • If DOB requests amendments, route all corrections through the project's certifying PE or RA, who manages the $145 amendment filing.

How audit results shape building operations and capital planning

An LL87 audit does more than satisfy a filing requirement. The ASHRAE Level II assessment produces a prioritized list of energy conservation measures, ranked by payback and implementation cost, that becomes a working document for facilities staff long after submission.

Retro-commissioning findings often reveal operational fixes that cost nothing beyond labor: a boiler running on an outdated schedule, control set-points drifted from design intent, or ventilation systems cycling longer than occupancy requires. DOB and MOS guidance frames retro-commissioning as verification that systems still operate as designed, which is often the fastest win available to a building team.

The audit's bigger value shows up in capital planning. Equipment nearing end of life gets flagged alongside its energy performance, giving owners a data-backed basis for sequencing boiler replacements, chiller upgrades, or envelope work against budget cycles rather than reacting to failures. Because the same ECM list feeds into Local Law 97 emissions compliance work, treating the LL87 report as a planning tool rather than a filing obligation tends to save owners a second, duplicative assessment a few years later.

Audit findings flowing into capital planning

Facilities teams that act on audit findings within the ten-year cycle, rather than filing the report and setting it aside, typically find their next LL87 cycle requires far less rework, since much of the equipment inventory and system documentation stays current.

Key definitions and terminology used in LL87 audits

A few terms recur throughout LL87 guidance, and mixing them up causes confusion during filing.

Energy Efficiency Report (EER): the complete submission package, including the audit, the retro-commissioning report, and both EERC forms.

ASHRAE Level II audit: the minimum required audit depth under DOB guidance, involving a detailed walkthrough, equipment inventory, and energy use analysis beyond a basic utility bill review.

Retro-commissioning: the process of testing building systems against their original design intent and current operating conditions, distinct from the audit itself.

Base building systems: the mechanical, electrical, and plumbing systems owned and controlled by the building owner, as opposed to tenant-owned equipment, which DOB FAQ guidance excludes from LL87 scope unless a long-term net lease applies.

Registered Design Professional (RDP): a New York State licensed PE or RA authorized to certify the audit and sign EERC2.

Energy Conservation Measure (ECM): a specific recommendation from the audit, such as a lighting retrofit or control upgrade, ranked by cost and payback.

Tax block filing-year rule: the mechanism that assigns each covered building to one year in a ten-year cycle based on the last digit of its tax block number.

Knowing these terms before the first meeting with your engineering team shortens scoping conversations considerably.

Examples of typical energy conservation measures identified in audits

ASHRAE Level II audits across New York City buildings tend to surface a recurring set of opportunities, since most pre-2000 building stock shares similar mechanical and lighting deficiencies.

  • Lighting retrofits from fluorescent or halogen fixtures to LED, often paired with occupancy sensors in common areas and stairwells.
  • Boiler control upgrades, including outdoor reset controls and updated burner tuning to reduce excess fuel use.
  • Building envelope sealing around windows and roof penetrations to cut heating and cooling losses.
  • Variable frequency drives on pumps and fans that currently run at constant speed regardless of demand.
  • Domestic hot water system upgrades, including insulation of distribution piping and temperature setback schedules.
  • Ventilation schedule adjustments that align system run-time with actual occupancy patterns rather than continuous operation.

Retro-commissioning frequently catches a simpler category of fix: set-points that drifted from original design, sensors that were never recalibrated after a prior renovation, or schedules left on default settings since installation. These zero-cost or low-cost corrections often deliver savings before any capital measure is funded, which is part of why pairing the audit with retro-commissioning under one team tends to produce a cleaner, more actionable report.

Author perspective: our approach and proof points

We built Bazini Engineering, P.C. as a licensed professional engineering firm handling MEP and FP design alongside energy code compliance work, and LL87 engagements are a regular part of that practice. Since our founding in 2010, we have found that pairing audit and retro-commissioning work under one engineering team, rather than splitting them across separate vendors, consistently produces a cleaner EER with fewer DOB review comments.

— Joseph

How we help with LL87 compliance

We handle LL87 energy audits and retro-commissioning coordination as part of one integrated engagement, allowing mechanical, electrical, and plumbing systems to be reviewed by the same engineers who can act on the findings afterward. That continuity matters once the audit identifies conservation measures that need actual design work.

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Our relevant services for building owners facing an LL87 deadline include:

A single in-house MEP/FP team means your audit findings, retrofit design, and permit filings move through one point of contact instead of three separate vendors trading documents. If your building's filing year is approaching, reach out through our services page to schedule an LL87 engagement before your deadline window tightens.

FAQ

What is the difference between Local Law 87 and Local Law 97?

Local Law 87 requires a one-time-per-decade energy audit and retro-commissioning report (the EER) that documents building systems and identifies efficiency opportunities. Local Law 97 sets annual carbon emissions limits for covered buildings and imposes penalties for exceeding them, making it an ongoing performance mandate rather than a periodic assessment.

What are the three types of energy audits?

Energy audits are generally grouped by depth: a preliminary or walk-through audit, a detailed audit, and an investment-grade audit with full engineering analysis. LL87 guidance requires at minimum an ASHRAE Level II audit, which falls into the detailed category and exceeds a basic walk-through.

Is it worth getting a home energy audit?

For a one, two, or three-family home, LL87 does not apply since those Class 1 properties are exempt. A voluntary home energy audit can still identify savings opportunities, but it is a separate decision from LL87 compliance, which applies to larger covered buildings.

Who does Local Law 97 apply to?

Local Law 97 applies to most buildings over a size threshold in New York City, setting emissions caps that buildings must meet on a rolling schedule. It runs alongside, but separately from, LL87's audit and retro-commissioning requirement.

Sources

Official DOB and DOE resources to complete an EER

Pulling from primary sources saves time compared to secondhand summaries: