The Short Answer
Local Law 97 assesses penalties against the building owner. There is no provision in the law that makes a tenant directly liable to the City for a building's carbon penalty. If your building exceeds its emissions limit, the Department of Buildings looks to the owner.
That is the entire extent of what the law settles. Whether the cost ultimately lands on the owner or gets passed to occupants is a lease question, not a compliance question — and leases written before 2019 rarely anticipated a per-tonne carbon penalty.
The practical result is that thousands of NYC commercial tenants are now receiving allocation letters for a fine they had never heard of, calculated by a consultant they did not hire, under a methodology they have no obvious way to check.
If you are a tenant who just received one of these: the number in the letter is an opening position, not an assessment. It is derived from the owner's benchmarking filing and a chosen allocation method. Both are reviewable.
How the Cost Travels From the City to a Tenant
Three mechanisms move an LL97 penalty downstream, and which one applies to you is entirely a function of your lease.
Operating expense escalations. The most common path. Most commercial leases let the owner pass through increases in building operating expenses above a base year. The fight is whether a regulatory penalty is an "operating expense" at all — many leases exclude fines, penalties, and costs arising from the owner's violation of law. A carbon penalty is arguably all three.
Compliance and legal-requirement clauses. Some leases obligate tenants to comply with laws applicable to their premises, or to bear costs of compliance. Owners increasingly read these as covering LL97. Whether that reading holds depends on whether the clause reaches building-wide obligations or only the tenant's own space.
Purpose-built carbon and sustainability clauses. Newer leases and recent renewals often contain an explicit LL97 provision with a stated allocation method. If you have one, it usually controls — which is exactly why the language matters more than most tenants realized at signing.
How Owners Allocate the Penalty
Once an owner decides to pass a penalty through, someone has to divide it. In practice, allocations come from an energy consultant retained by the owner, and almost always follow one of three approaches:
| Method | How it works | Typical effect |
|---|---|---|
| Pro-rata by floor area | Penalty × (tenant SF ÷ building SF) | Simple; ignores who actually uses the energy |
| Metered or submetered use | Penalty allocated by measured consumption | Fairest in principle; requires submetering most older buildings lack |
| Modeled use by occupancy type | Consultant estimates each space's emissions against a per-use allowance | Most common in mixed-use buildings; most assumption-dependent |
The third method is where the money is, and where the disputes are. A mixed-use building — retail at the base, offices or assembly above — has no single emissions limit. The building's allowance is the sum of allowances for each use type within it, and the consultant must decide which square footage belongs to which category before any calculation begins.
Where Allocations Break Down
Across tenant-side reviews, the same four problems recur. If you are on the receiving end of an allocation, these are the first four things to check.
1. The occupancy classification changed between filing years
LL97 emissions allowances are set per occupancy group, and the spread between groups is wide — categories describing physically similar spaces can carry allowances differing by a factor of two or more. A space classified one way in the 2019–2023 benchmarking filings and a different way in the first LL97 compliance filing will produce a materially different limit from identical energy use.
Pull the building's prior-year LL84 benchmarking filings from NYC Open Data and compare the use breakdown line by line against the LL97 filing. Reclassifications are visible, dated, and public. It is not unusual to find that a building's entire penalty is a product of a classification change rather than a change in how much energy anyone used.
2. The gross floor area was restated
Emissions limits scale with area. A building's official square footage appears in at least three places — the Department of Finance property record, prior benchmarking filings, and the LL97 filing itself — and those numbers do not always agree. When they diverge, the limit moves, and so does the penalty.
Reduce the area, and the limit falls with it — even if actual emissions never changed.
A restatement made for one purpose, such as a tax assessment, can create a compliance penalty that would not exist under the previously reported figure. Whether that restatement is correct is a legitimate question, and its timing relative to the filing is worth knowing.
3. The filing used estimated or default energy values
Benchmarking submissions carry flags indicating whether the reported energy data was measured or estimated, and whether default values were substituted for missing data. Those flags are part of the public record. A penalty computed from estimated inputs — particularly in buildings on district steam, where seasonal allocation is genuinely difficult — carries real uncertainty that the allocation letter will not mention.
4. The allocation over-collects against the actual penalty
This one is arithmetic, and it is the fastest check a tenant can run. When a consultant computes each occupant's excess emissions separately and treats occupants who came in under their allowance as contributing zero, the allocated amounts sum to more than the penalty the building actually owes. The unused allowance of an efficient occupant simply disappears.
Run the sum. Add up every occupant's allocated share and compare it to the building's actual DOB penalty. If the allocations total more than the penalty, the method is transferring one occupant's unused allowance into another occupant's bill — and that is a defensible thing to push back on.
What a Tenant Should Do
If you have received an allocation, or expect to:
- Get the filing, not the summary. Request the building's LL97 submission and supporting emissions calculation, not the consultant's cover letter. Prior-year benchmarking data is public regardless of whether the owner cooperates.
- Read the lease before responding. The threshold question is whether a penalty is passable through at all under your specific language. That determines whether the calculation even matters.
- Reconcile against your own bills. If you have direct utility accounts, your consumption is verifiable. Allocated shares of base-building steam or electricity are estimates, and estimates can be tested.
- Look at 2030, not just this year. Limits tighten substantially in the 2030–2034 compliance period. A modest allocation today can become a five- or six-figure annual figure under the next set of limits — which makes lease renewals and escalation caps negotiated now considerably more consequential.
What an Owner Should Do
The same analysis runs in reverse. Owners who allocate on a method that over-collects, or on a filing with an unexplained area restatement, invite disputes that cost more than the penalty. A defensible allocation — documented, reconciled to the actual penalty, and consistent with the classification history — is worth more than an aggressive one.
The buildings that handle this well are the ones that treated the first compliance filing as the beginning of a multi-year position rather than a form to submit.
The Larger Point
LL97 was written as a building-level obligation, and buildings are not occupied by a single party. The law's arithmetic is straightforward; the allocation of its cost is not, and it is being worked out right now across thousands of leases, mostly through letters and spreadsheets rather than litigation.
Whichever side of the lease you sit on, the leverage is in the filing. Almost everything that determines the number — square footage, use classification, whether the data was measured or estimated — is public, dated, and checkable.
Received an LL97 Allocation You Don't Understand?
We review LL97 filings, emissions calculations, and tenant allocations independently — for owners and tenants alike. Initial consultations are free.