NYC Local Law 18 and What It Means for STR Lending

What Local Law 18 actually does

Local Law 18 isn’t a headline “Airbnb ban.” It’s a registration system: short-term hosts must register with the city, platforms can only process transactions for registered listings, and the qualifying conditions are strict. The enforcement mechanism — booking platforms verifying registration before they’ll process a stay — is what gave the rule teeth.

The conditions are where the investor deal dies. Registration generally requires the host to be a permanent occupant present during the stay, with a tight limit on guests, and the unit can’t be rented as a whole, un-hosted space for short stays. That combination is fine for a resident renting a spare room. It’s incompatible with the non-owner-occupied, whole-unit STR an investor buys for nightly revenue.

Why this breaks STR underwriting in NYC

A DSCR loan on STR income substitutes a nightly-revenue projection for a lease. That substitution only holds if the property can legally earn nightly revenue. Under Local Law 18, the investor’s whole-unit, un-hosted short-term rental generally can’t register, can’t transact on the major platforms, and therefore can’t produce the income the projection assumes.

So the projection collapses to roughly zero legal short-term revenue. There’s nothing for a lender to underwrite as STR income — which means, in practical terms, you generally can’t qualify a NYC deal on short-term income. This isn’t a haircut like a night cap; it’s the removal of the income category itself for the investor case.

Hosted-room vs. un-hosted-unit — the line that decides the loan

The single distinction that governs a NYC STR deal is whether the stay is hosted (a permanent occupant present) or un-hosted (the whole unit rented out). The law treats them completely differently, and only one of them is the thing investors buy.

The takeaway is simple: the only NYC use that produces underwritable short-term income is one no investor is structured to run. The deal doesn’t survive as an STR — it survives by changing length of stay.

The realistic pivot — mid-term and long-term

Stays of 30+ days fall outside the STR rules

A NYC property that fails as a short-term rental can still be a sound DSCR deal at a longer length of stay, because stays of 30 days or more fall outside the short-term-rental rules entirely. That moves you from an income category the city closed to one it never restricted.

1. Re-underwrite on a 30+ day mid-term lease — furnished stays for corporate housing, medical, and relocation tenants; a premium over plain long-term, outside STR rules.
2. Or re-underwrite on a standard 12-month lease — the lowest revenue but the most lender-acceptable and ordinance-proof input there is.
3. Run the new rent through PITIA at the current STR-overlay rate — or the standard DSCR rate if it’s a straight long-term deal.
4. Compare to the lender’s DSCR floor — if neither MTR nor LTR clears it at the NYC purchase price, the deal genuinely doesn’t work, and that’s the law doing its job.

The mechanics of switching the underwriting from short-term to mid-term are covered in convert an Airbnb to a mid-term rental DSCR and requalifying after a mid-term pivot.

Before you underwrite a NYC deal

Local Law 18 is a registration regime whose enforcement reshaped the market — but the specifics, thresholds, and any amendments are exactly the kind of thing that shifts. Treat this as the mechanism, not the final word, and verify the current ordinance with the city before you commit capital.

For the current NYC status and what it does to a deal, see the New York, NY legality page and the broader short-term-rental laws hub. Then run the specific address through the feasibility check to see whether it pencils as an MTR or LTR.