Most NYC buildings met emissions standard in first compliance year

New York City's building emissions law, Local Law 97, just finished its first year of enforcement, and most buildings passed. The law applies to buildings over 25,000 square feet and requires them to meet greenhouse gas limits or complete certain one-time upgrades. Of roughly 29,000 buildings required to report on 2024 emissions, 95% either met their limit or filed the required paperwork on time. Owners who fell short often got there through fairly ordinary upgrades: better lighting, sealing up the building envelope (gaps and leaks in walls, windows, and roofs that let conditioned air escape), heat pumps, and smarter building management systems.

For the smaller share of buildings that missed the mark, the city is now sending deficiency notices and fines rather than easing off. Fines can run up to $268 per ton of excess carbon emissions, though owners can sometimes offset penalties by paying into an affordable housing fund, submitting a decarbonization plan, or showing they're already underway with retrofits. Roughly 470 buildings exceeded their limits, and most of those were only modestly over.

None of this applies to typical single-family homes, since the law targets larger buildings. But it matters if you live in a co-op, condo, or rental building covered by the rule, since your building's owner or board may soon face pressure to invest in upgrades like heat pumps or efficiency improvements. The bigger test comes in 2030, when limits tighten sharply and buildings will need to cut emissions by 40%, likely pushing many owners toward deeper retrofits than what got them through this first round.