Local Law 97 for co-ops and condos: what the filing says before the board meets

Most co-op and condo buildings file as Multifamily Housing. Across the 17,080 multifamily buildings in the 2024 filings, the median ENERGY STAR score is 69.0, median GHG intensity 5.0 kgCO2e/sf, and 16.6% are over the 2024-2029 limit while 86.0% are over the 2030-2034 limit on today's filed emissions; among those over, the median arithmetic exposure is $17,852 per year now and $31,405 per year from 2030.

Source: NYC Open Data, LL84 Building Energy and Water Data Disclosure (public domain), 2024 LL84 filings, buildings of 25,000 sf or more, one row per tax lot. Property type, floor area and emissions are self-reported by the filer; medians over buildings reporting the field. Limits: emissions factors in 1 RCNY 103-14; penalty rate USD 268 per tCO2e from the LL97 page. Data as of 2026-11-03.

What a board can take from the public data

• The filed score, EUI and intensity for the building, and the same for the 10 nearest-size multifamily buildings in the borough (the paid report names them with address and BBL).
• Where the building sits in the pool: a percentile on each metric, which says whether the gap to the limit is unusual for its peers or shared by most of them.
• The three-year trend of filed emissions and EUI, which shows whether earlier work changed the figures.
• The limit for the filed type and size, and the arithmetic exposure at USD 268/t for both periods, as planning numbers.

What it cannot tell a board

Whether an adjustment, the Article 321 path, RECs or offsets apply; whether the self-reported type and floor area are right (a wrong type changes the factor); what any retrofit will cost or save; and anything about enforcement. Those are questions for the building's engineer and counsel; this is not legal, engineering or financial advice.