// NYC building laws

NYC Building Compliance Laws

Most NYC buildings over 25,000 square feet are covered by four overlapping local laws — each with different deadlines, different thresholds, and different penalties. Here's how they fit together, what they require, and how to figure out which ones apply to your building.

The four laws at a glance

LL84
Annual energy and water benchmarking
Threshold
25,000 sf
Frequency
Annual
Penalty floor
$500/quarter, $2,000/yr cap
Filed via
ENERGY STAR Portfolio Manager (ESPM) → BEAM
LL87
Decennial energy audit and retro-commissioning
Threshold
50,000 sf
Frequency
Every 10 yrs
Penalty floor
$3,000 yr 1, $5,000/yr after, no cap
Filed via
DOB Energy Efficiency Report (EER) submission
LL88
Lighting upgrades and tenant electrical submetering
Threshold
25,000 sf
Frequency
One-time
Penalty floor
$1,500/yr per missed report
Filed via
BEAM portal
LL97
Carbon emissions caps and annual emissions reports
Threshold
25,000 sf
Frequency
Annual
Penalty floor
$268 per metric ton CO2e over the limit, per year
Filed via
DOB NOW (filing fee) → ESPM (energy data) → BEAM (final report)

Thresholds reflect the post-2017 amendments to the Greener Greater Buildings Plan, which lowered the LL84 / LL88 / LL97 floor from 50,000 sf to 25,000 sf. LL87 still applies at 50,000 sf. Buildings on a tax lot with combined floor area over the multi-building threshold may be covered even when no single building meets the floor.

Search your building first. The pages below explain each obligation. The compliance checker tells you exactly where your property stands across all four laws — covered or not, deadlines, and estimated annual exposure.

Check your building Free, no signup required. Returns results in 10 seconds.

How the laws connect

The four laws weren't designed in isolation — they were built to layer on each other, and the work they require frequently overlaps. Owners who treat them as four separate compliance projects spend more, take longer, and miss optimization opportunities that show up only when the work is coordinated.

LL84 produces the data the others depend on. Annual benchmarking is the energy-consumption foundation. The data LL84 collects feeds directly into LL97 emissions modeling — buildings without current LL84 filings can't accurately determine their LL97 exposure, and may be disqualified from LL97 “good faith” pathways that require demonstrated benchmarking compliance. LL87 audits also reference the LL84 baseline as their starting point.

LL88 lighting upgrades reduce LL97 emissions, directly. Lighting typically accounts for 15–25% of a commercial building's electrical load. Buildings that completed LL88 work in 2023–2024 saw measurable drops in their LL97 reported emissions — sometimes enough to move them from “exceeding 2024 cap” to “comfortably under.” The work isn't just a separate compliance obligation; it's one of the highest-ROI emissions reduction levers available.

LL87 audit findings inform LL97 decarbonization planning. Buildings on the LL97 Good Faith Effort pathway have to file a Decarbonization Plan — and the credible plans are built on actual energy audit data, which is exactly what LL87 produces. A building approaching its LL87 cycle and facing 2030 LL97 caps can run both engagements as one coordinated program rather than two separate consulting expenses.

The grade label (LL33/95) is the public-facing thread that ties LL84 to occupant accountability. The letter posted at the entrance is calculated from the LL84 data — making the benchmarking submission consequential not just for compliance, but for tenant perception, leasing, and asset value.

Two waves of NYC building energy law

The four laws came out of two distinct legislative packages — and which wave a law belongs to clarifies what it's trying to accomplish.

2009: Greener Greater Buildings Plan (GGBP)

The 2009 package focused on measurement and prescriptive upgrades: measure consumption (LL84), audit and tune the systems (LL87), mandate the highest-payback upgrades (LL88 lighting and submetering). LL85 updated the NYC Energy Conservation Code that LL88 references. Together: measurement, assessment, and prescribed action.

2019: Climate Mobilization Act (CMA)

The 2019 package shifted to outcomes. Where GGBP told buildings what to do, CMA told them what to achieve. LL97 caps actual emissions and lets buildings choose the path. LL95 refined the public energy grade label. LL92/94 mandated solar or green roofs on new buildings. LL96 set up PACE financing.

Most NYC buildings face obligations from both waves simultaneously — which is why coordination matters.

The four pages

Each law has its own deep-dive page covering deadlines, penalties, who's covered, and what filing actually looks like.

LL84

Local Law 84 — Annual Benchmarking

The data foundation everything else builds on. Whole-building energy and water consumption submitted annually by May 1, with quarterly penalties for missed deadlines and a separate $1,250 obligation for the public energy grade label.

Read the full LL84 page →
LL87

Local Law 87 — Energy Audit & Retro-commissioning

The deepest dive any NYC law makes into how a building actually operates. Decennial filing keyed to the building's tax block number — and the most expensive law to ignore long-term. Penalties accrue at $5,000/year with no cap.

Read the full LL87 page →
LL88

Local Law 88 — Lighting & Submetering

The most physical of the four laws — actual upgrade work, not just reporting. Covers lighting power density, controls, and tenant submetering for buildings where the January 2025 deadline has already passed. Penalties recur annually until both the work and the filing are done.

Read the full LL88 page →
LL97

Local Law 97 — Carbon Emissions

The 2019 climate law that set the city's emissions trajectory through 2050. Article 320 buildings face annual caps with $268-per-ton penalties; Article 321 buildings have a one-time prescriptive option. The 2030 cap, ~50% stricter than the current period, is the structural cliff most owners are planning toward.

Read the full LL97 page →

How LuxNet helps

LuxNet works across this entire system rather than within any one law. Our field surveys produce the lighting and controls data that feeds LL88 attestations, LL87 audit findings, LL97 emissions modeling, and the LL84 benchmarking baseline that connects them all. For most owners, that means one engagement instead of three or four parallel ones — and a coordinated plan that catches the overlaps before they become duplicated work.

If you have an upcoming deadline on any of these laws — or you're trying to figure out how the rest of the cluster fits — start with a building check. That gives you the full compliance picture in 10 seconds. A scoping call comes after, when there's specific exposure to act on.

Check your building Schedule a scoping call

FAQ

Which laws apply to my building?
Coverage depends on your building's size, type, and location. Most NYC buildings over 25,000 gross square feet are covered by LL84, LL88, and LL97. Buildings over 50,000 sqft also fall under LL87. Tax-lot aggregation rules can pull in smaller buildings too — multiple buildings on the same tax lot or under the same condo board are evaluated by combined area, not individual size. The DOB Sustainability Law Covered Buildings List is the authoritative source. Our compliance checker cross-references it for any NYC building.
What's the smallest building these laws cover?
The lowest individual-building threshold across the four laws is 25,000 gross square feet (LL84, LL88, LL97). LL87 is stricter at 50,000 sqft. But tax-lot aggregation can pull in smaller buildings — a 15,000-sqft building sharing a tax lot with a 90,000-sqft building is covered as long as the combined area exceeds the relevant threshold (100,000 sqft for LL84/87/88, 50,000 sqft for LL97).
When did these laws start being enforced?
LL84 has been enforced annually since 2010. LL87 has been on its decennial cycle since 2013, with each building's first deadline determined by its tax block number. LL88's compliance deadlines hit in January 2025 (with filings due May 1, 2025). LL97's first compliance period began in 2024, with the first annual emissions reports due May 1, 2025. As of 2026, all four laws are actively being enforced — and DOB has begun billing first-period penalties for LL97.
Do I need a separate consultant for each law?
Not necessarily. The work overlaps significantly, and engaging separate consultants for LL84, LL87, LL88, and LL97 in parallel typically costs more than coordinated work — and produces redundant deliverables. Most buildings benefit from a single team that handles the survey and data-collection layer (lighting, controls, energy data) coordinated with whichever specialists handle the certifications each law requires (RDP for LL84/87/97, RDP or licensed electrician for LL88).
// One coordinated plan, not four

Four laws. One coordinated plan.

NYC building energy laws overlap. A single field survey can often support LL88 documentation, LL87 audit inputs, LL97 planning, and the benchmarking data trail behind LL84. Start with a building check, then decide what work actually needs to happen.

Schedule a Scoping Call Check Your Building

Estimated penalty amounts and compliance pathways may vary annually. Projections are intended to aid compliance planning but may not exactly match actual penalties. The compliance pathways are based on DOB's Covered Buildings List, which was compiled using preliminary data subject to change. This information is intended only as a reference for building owners to consider in consultation with legal representatives and registered design professionals (RDPs). LuxNet's compliance check is informational and does not constitute legal or financial advice. Actual fines depend on building specifics, filing history, and DOB enforcement. For a definitive assessment, schedule a free scoping call.

Last updated: May 2026. NYC building compliance rules, deadlines, and DOB procedures may change.

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