What Is Local Law 97 and Does Your NYC Building Need to Comply?
Local Law 97 is a New York City law. It limits the amount of carbon a large building can emit each year. It's part of the Climate Mobilization Act. The city passed it in 2019. It took effect in 2024.
Most owners don't need a history lesson on the law. They need one answer: does this apply to my building? Here's how to find out.
What Local Law 97 actually does
The law sets a yearly carbon cap for covered buildings. Every covered building has to:
Track its energy use
Calculate its emissions
File an annual report with the Department of Buildings
Stay under its assigned cap, or pay a penalty for going over
The first compliance period runs from 2024 through 2029. Caps get stricter in 2030. They keep tightening every five years after that.
Is your building covered?
Coverage comes down to one thing: square footage. Building type doesn't matter. A residential building, a commercial building, and a mixed-use building all follow the same rule.
Your building is covered if:
It's a single building over 25,000 gross square feet
It's one of two or more buildings on the same tax lot, and together they exceed 50,000 square feet
It's one of two or more condo buildings under the same board of managers, and together they exceed 50,000 square feet
Here's the part that trips owners up. The city uses Department of Finance records to check your square footage, not your own paperwork. If your internal numbers say you're under the threshold, but the city's records say otherwise, the city's numbers win.
One more detail worth knowing: coverage is checked building by building, even on a shared lot. So it's possible for one building on a property to be covered while another one next to it isn't.
What compliance actually requires
Most covered buildings follow the law's standard path. It sets an emissions cap based on your building's size and how the space is used. You file that report every year, by May 1, covering the previous year's energy use.
A smaller group of buildings follows a different, less strict path. This group includes:
Certain affordable housing properties
Buildings with a large share of rent-regulated units
Houses of worship
Whether your building qualifies depends on ownership and tenant mix, so it's worth checking rather than guessing.
In practice, most owners start with an energy audit. That tells you where your building actually stands against its cap. From there, some buildings are already fine and just need to keep filing. Others need real changes, like upgraded heating and cooling systems or building envelope improvements, to get under the limit before the caps tighten further.
What happens if you don't comply
Two separate things can go wrong here, and they're not the same problem:
Missing the filing deadline. This is its own violation, separate from your emissions numbers.
Filing on time but going over your cap. This triggers a financial penalty, charged per ton of emissions above your limit.
That penalty isn't a one-time hit. It comes back every year your building stays over the cap. Fixing the underlying issue early is almost always cheaper than paying the penalty year after year while you figure out a plan.
Where owners go wrong
Two mistakes come up again and again.
Assuming their building is too small or too "normal" to qualify. Local Law 97 doesn't care what a building looks like. A mid-sized residential building can be just as covered as a large commercial tower, once the square footage math works out.
Treating the early years as low-stakes. The current caps are manageable for a lot of buildings. The 2030 caps are much tighter. Retrofits take time to plan, fund, and finish. Waiting until the deadline is close leaves very little room to actually fix anything.
How to get a real answer for your building
Start here:
Check your building's square footage against Department of Finance records, not your own files.
Get an energy audit or benchmarking review to see where you stand today.
Compare that against both the current cap and the 2030 cap, so you're planning ahead, not just reacting.
At Roman NYC Restoration, we help NYC property owners work through exactly this process. We confirm whether your building is covered, check your current emissions against the limits that apply to you, and build a plan around both today's requirements and what's coming in 2030. Get in touch before a deadline makes the decision for you.
Frequently asked questions
Does Local Law 97 apply to residential buildings, or just commercial ones?
Both. Coverage is based on square footage, not building type. A residential building over 25,000 square feet is covered the same as a commercial one.
What size building is covered under Local Law 97?
A single building over 25,000 gross square feet. Or, two or more buildings on the same tax lot (or under the same condo board) that together pass 50,000 square feet.
What happens if my building goes over its emissions limit?
You owe a penalty for every ton of emissions above the cap. That penalty repeats every year the building stays over the limit.
Are there any exemptions?
A separate compliance path exists for certain affordable housing, buildings with many rent-regulated units, and houses of worship. Whether you qualify depends on your building's ownership and tenant details.
The bottom line
Local Law 97 coverage depends on documented square footage, not on how big your building "feels." If your numbers cross 25,000 square feet alone, or 50,000 combined with other buildings on your lot, the law applies to you. Confirming this now, while the current caps are still manageable, puts you in a much better spot than finding out later through a violation notice.
About the Author
Billy Duka has spent his career working on New York City buildings, from facade and rooftop conditions to the compliance rules that come with owning property in the five boroughs. As a second-generation contractor with hands-on NYC experience, he writes to help building owners cut through the confusion around local compliance laws and understand exactly what applies to their property, in plain language, before it becomes a violation notice.
Visit us: https://www.romanll11nycrestoration.com/
