Local Law 97: What NYC Landlords Need to Know About Emissions

New York City has set an ambitious goal: dramatically cut greenhouse gas emissions from its largest buildings over the coming decades. Local Law 97, passed as part of the city's Climate Mobilization Act of 2019, is the tool for getting there. For owners of larger residential buildings, it's one of the most consequential compliance obligations to land in years — and one that's easy to misunderstand.

This guide explains who Local Law 97 covers, what it requires, how it's enforced, and why buildings with rent-regulated units follow a different track. If you own a larger Brooklyn or NYC multifamily building, this is essential reading.

What is Local Law 97?

Local Law 97 sets greenhouse gas emissions limits on large buildings across New York City, with those limits tightening in stages on the path toward the city's long-term climate targets. Rather than dictating exactly how you run your building, the law sets a cap on how much carbon your building can emit each year based on its size and how it's used, and holds the owner responsible for staying under it.

The law is administered and enforced by the NYC Department of Buildings (DOB), through its Office of Building Energy and Emissions Performance. This is separate from the agencies that regulate rents and housing conditions — HPD and the state's DHCR — so Local Law 97 is a genuinely new compliance area for many owners, layered on top of existing landlord obligations.

Does Local Law 97 apply to my building?

The core threshold is size. Local Law 97 generally applies to:

• Buildings over 25,000 gross square feet, and
• Certain groups of two or more buildings on the same tax lot, or governed as a single condominium, that together exceed that square footage.

Most small multifamily buildings — the two-to-six-unit walk-ups common across Brooklyn — fall below the threshold and are not directly covered by the emissions caps. Larger apartment buildings, including many of the bigger properties in a diversified portfolio, often are.

A few practical cautions:

• Square footage is measured across the whole building, so a mixed-use building with ground-floor retail and apartments above is measured as a whole.
• Lot and condo configurations matter. Multiple smaller buildings held together can be aggregated over the threshold even if none individually exceeds it.
• Coverage can evolve. The city's climate goals extend to 2050, and requirements have been refined since the law passed. Don't treat "we're exempt" as permanent.

If you're not certain of your building's exact gross square footage or how your lot is structured, confirm it with a professional before drawing any conclusions. This is exactly the kind of detail we track for the buildings we manage through our full-service property management and inspection programs.

What does compliance actually require?

For covered buildings, Local Law 97 has two connected obligations:

1. Stay under your emissions limit. Each covered building has an annual emissions cap calculated from its size and occupancy type. Limits started at one level for the first compliance period and step down in later periods, moving toward the city's deeper reduction targets for 2030 and beyond. A building comfortably under its limit today can exceed a stricter future cap without changes.

2. Report annually. Covered owners must file an annual emissions report, prepared and certified by a registered design professional (a licensed engineer or architect), documenting the building's emissions for the year. Filing on time is mandatory even for buildings already under their limit — a missed report is its own violation.

Emissions are driven largely by how a building uses energy: heating and hot water, cooling, lighting, and the fuel mix behind them. That's why efficiency upgrades — better controls, heating and hot-water improvements, insulation, and lighting — are the practical levers most owners reach for. Larger measures are often best planned as part of coordinated capital improvement work rather than as one-off emergencies.

How is Local Law 97 enforced, and what are the penalties?

The DOB reviews filings and can assess penalties in two main situations:

• Exceeding the emissions limit — a penalty tied to each metric ton of greenhouse gas emissions over the building's annual cap.
• Failing to file the required annual report — a separate penalty for non-reporting.

We're deliberately speaking qualitatively about penalty amounts here, because the figures are set by the city and can change; confirm the current numbers with the DOB or a qualified professional. The important takeaway is that penalties accrue annually and scale with how far over the limit a building runs — so a building drifting over its cap can face a recurring, growing cost rather than a one-time fine. That math is what makes early planning worthwhile.

Why rent-regulated buildings follow a different path

This is where Yak Management's focus on rent-stabilized and subsidized housing becomes especially relevant. Local Law 97 recognizes a basic tension: owners of rent-regulated buildings can't simply raise rents to pay for expensive decarbonization work, the way a market-rate owner theoretically could.

So buildings with a high proportion of rent-regulated units generally follow an alternative compliance path built around a set of prescribed energy-conservation and efficiency measures, rather than the hard, tightening emissions caps that apply to market-rate buildings. The idea is to require meaningful, achievable improvements without imposing per-ton penalties that a regulated owner has no rent flexibility to absorb.

If you own rent-stabilized housing, this distinction is critical:

• You may not be subject to the same emissions caps as a comparable market-rate building.
• You likely still have obligations — the prescribed measures and their deadlines are their own requirement, not an exemption.
• The details depend on your building's unit mix and regulatory status, which need to be verified rather than assumed.

Getting this right requires understanding both the emissions rules and NYC's rent-regulation framework at the same time — which is precisely the intersection our team lives in.

What upgrades actually move the needle?

Because emissions are driven by how a building consumes energy, the most effective improvements target heating, hot water, and the fuel mix behind them — the biggest sources of carbon in a typical NYC apartment building. Owners commonly look at:

• Heating and hot-water efficiency — modern boilers or heat-pump systems, better controls, and eliminating overheating (a surprisingly large source of waste in older steam-heated buildings).
• Building envelope — insulation, air sealing, and window improvements that reduce how hard the heating system has to work.
• Lighting and controls — LED conversions and smart controls in common areas, which are relatively low-cost and quick to implement.
• Metering and monitoring — understanding where energy actually goes so upgrades are aimed at the biggest problems first.

The right mix depends entirely on your building's age, systems, and budget. What matters is sequencing: pairing emissions-driven upgrades with work you'd be doing anyway, and phasing bigger investments across compliance periods so you're improving ahead of the tightening limits rather than scrambling after a penalty. For the buildings we manage, we treat this as part of long-term capital planning, not a fire drill.

Plan for the future, not just today

The single most important mindset shift with Local Law 97 is that it's not static. The emissions limits step down over time on the way toward the city's deeper reduction goals. A building sitting comfortably under its current cap can quietly drift into penalty territory when the next, stricter limit takes effect — without anyone changing a thing about how the building operates.

That's why the owners who fare best treat compliance as a multi-year plan: benchmark now, understand the trajectory of your building's limits, and schedule upgrades so each compliance period is met before it arrives. Waiting until a penalty lands is almost always the most expensive way to comply.

A short note on legal advice

This page is general information, not legal advice. Local Law 97, its rules, and its deadlines are detailed and have been refined since 2019, and how they apply turns on your building's specific size, use, and regulatory status. For decisions with financial or legal consequences, consult a qualified attorney and a registered design professional who can assess your building directly.

How Yak Management helps larger-building owners

For owners of the larger buildings Local Law 97 touches, compliance isn't a one-time filing — it's an ongoing operational discipline that overlaps with maintenance, capital planning, and rent-regulation strategy. That's the kind of work we do every day. As a boutique, principal-involved manager, we help owners:

• Track which requirements actually apply to each building, including the rent-regulated alternative path.
• Coordinate the professionals — engineers, energy consultants, and vendors — who benchmark emissions and file reports.
• Plan efficiency upgrades sensibly, folding them into renovation and capital-improvement work rather than reacting under deadline pressure.
• Keep the rest of the building compliant too, from HPD registration to heat, hot water, and inspections.

If you own a larger multifamily building in Brooklyn or elsewhere in NYC and want a clear read on where you stand, schedule a property consultation or reach out to our team. We'll give you an honest assessment of what your building needs — and handle the parts you'd rather not.

This article is general information, not legal advice. Consult a qualified attorney about your specific situation.