If you own, manage, or oversee a building in New York City, one of the easiest ways to get overwhelmed is trying to sort out which energy laws actually apply to your property.
You may hear people mention Local Law 84, Local Law 87, Local Law 88, and Local Law 97 as if they are all the same thing. They are not. They are connected, but each one covers a different part of NYC building energy compliance.
The good news is that there is a simple way to think about them.
In most cases, these laws apply based on a few core factors:
For many owners and property managers in NYC the real question is not just what these laws are. It is which ones apply now, which ones come later, and what needs attention first.
For NYC building energy laws, size is often the first screen.
Local Law 84 generally applies to covered buildings that exceed 25,000 gross square feet, as well as certain larger building groupings on the same tax lot or under the same condominium board. Local Law 97 also generally applies to most buildings over 25,000 gross square feet, with some additional covered-building rules for certain building groupings. Local Law 87 applies to large private-sector buildings over 50,000 gross square feet, along with certain larger groupings. Local Law 88 is tied to covered buildings and focuses on lighting and sub-metering requirements.
That means a building under 25,000 square feet may not fall under these four major energy laws in the same way a larger building does. But once a property crosses those thresholds, the compliance picture becomes much more important.
Local Law 84 is the annual benchmarking law.
If your building is covered, you generally need to submit benchmarking data for energy and water use every year. This is one of the foundational NYC building energy requirements because it creates the performance record the City uses to understand how a building is operating. Benchmarking reports are generally due annually, with May 1 serving as the standard deadline.
In practical terms, LL84 is often the first law owners become familiar with because it is recurring and data-driven.
A simple way to think about it is this:
LL84 asks:
If your building is covered and you are not benchmarking properly, it becomes harder to stay organized for the rest of the compliance stack.
Local Law 87 is different from annual benchmarking.
It requires certain covered buildings to undergo an energy audit and retro-commissioning process and submit an Energy Efficiency Report, or EER. This is not an every-year requirement for every building. Instead, it runs on a cycle tied to the last digit of the building’s tax block number. In general, the filing year matches that last digit.
A simple way to think about it is this:
LL87 asks:
This law matters because it goes beyond tracking utility usage. It looks at how building systems are functioning in the real world. For many larger buildings, LL87 becomes the law that forces a deeper operational review instead of just annual reporting.
Local Law 88 focuses on lighting upgrades and electrical sub-metering requirements in covered buildings.
In plain English, this law is about improving the efficiency of lighting systems and making energy use in certain tenant spaces more visible. NYC guidance explains that LL88 requires covered buildings to upgrade lighting power allowances and controls and to install electrical sub-meters in covered tenant spaces. City guidance also notes that large non-residential buildings are required to install electrical sub-meters for certain large non-residential tenant spaces.
A simple way to think about it is this:
LL88 asks:
This law can be easy to underestimate because owners often focus more heavily on benchmarking or emissions. But if LL88 applies to your building, it should not be treated as an afterthought.
Local Law 97 is the emissions law, and for many building owners it is the most consequential one.
This law sets greenhouse gas emissions limits for most covered buildings over 25,000 square feet. Those limits began in 2024 and become stricter over time. Annual compliance reports are required, with reporting tied to the prior calendar year. DOB guidance states that for most buildings, annual LL97 compliance reports are due by May 1, with a grace period through June 30.
A simple way to think about it is this:
LL97 asks:
This is the law that changes the conversation from tracking energy use to actively managing emissions performance. For co-ops, condos, multifamily properties, and commercial buildings across NYC, LL97 is often the law that turns energy planning into a long-term capital and operations issue.
Here is the simplest framework:
If it is a covered building that must benchmark energy and water use annually.
If it is a larger covered building subject to periodic energy audits, retro-commissioning, and an Energy Efficiency Report cycle based on tax block number.
If it is on the covered-building path for lighting upgrades and, where applicable, sub-metering requirements in qualifying tenant spaces.
If it is a covered building subject to annual greenhouse gas emissions limits and reporting.
And in many cases, the answer is not one law. It is several.
That is where owners get tripped up. They assume one filing handles everything. It does not.
The biggest mistake is waiting until a deadline is close before figuring out which rules apply.
By then, teams are often chasing building data, utility records, prior filings, system information, tenant details, or compliance documentation that should have been organized much earlier.
That is why the better question is not just, “What does this law require?” It is, “What category is my building in, and what does that trigger?”
Once you answer that, the path gets much clearer.
If you are unsure which NYC building energy laws apply to your building, start here:
That process is usually what turns a confusing compliance question into a manageable action plan.
Not every NYC building is subject to every energy law. But once a property is large enough to be covered, there is a strong chance that more than one requirement is in play.
The key is figuring out where your building fits before deadlines pile up.
If your team needs help understanding which requirements apply, organizing filings, or planning around LL84, LL87, LL88, and LL97, Energo can help you make sense of the compliance landscape and build a clearer path forward.
Not sure if your building needs to comply with Local Law 84, 87, 88, or 97? Our team can review your property and help you understand exactly what applies and what to do next.
Call: 888-378-9898
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