
| Requirement | Typical Standard |
|---|---|
| Days residing at property | 270+ days per year (varies; some cities set 183 days) |
| Documentation required | Government-issued ID, tax returns, utility bills, voter registration |
| Permits per owner | One primary residence permit only |
| Verification frequency | Annual renewal with updated documentation; some cities require a mid-year affidavit |
| Renting while away | Allowed up to the city's annual night cap |
| Renting while present | Usually unrestricted under the owner-occupied rental category |
Enforcement mechanisms have grown more sophisticated. Several major cities now operate data-sharing agreements with booking platforms, cross-referencing permit addresses against listing data. When the permit address and the host's documented residence differ, the listing is flagged for inspection or delisted automatically.
The requirement is most common in high-demand coastal cities with acute housing pressure, but it has spread steadily to mid-size markets:
| City | Rule Details | AirROI Median Min. Nights |
|---|---|---|
| New York City, NY | Primary residence required; host must be present during stays under 30 nights | 25.8 |
| San Francisco, CA | Primary residence required; 90-night cap per year when host is away | 14.7 |
| Los Angeles, CA | Primary residence required; 120-night annual cap (extendable to 180 with approval) | 20.7 |
| Denver, CO | Primary residence required; annual affidavit mandatory | 14.4 |
| Portland, OR | Primary residence required for standard (Type A) permits | — |
| Boston, MA | Must be owner-occupied primary residence | — |
| Seattle, WA | Primary residence operators face significantly fewer restrictions than investors | — |
Regulations change frequently. Verify current rules with your local government or planning department.
The minimum-stay data tells part of the story. New York's 25.8-night median sits just below the 30-night legal threshold for stays without host presence — a direct reflection of the host-present rule eliminating most nightly inventory. San Francisco's 14.7 nights and Los Angeles's 20.7 nights reflect different flavors of the same underlying logic: when investor-owned nightly rentals are banned, the remaining supply shifts toward longer engagements.
Primary residence rules rarely eliminate STR activity outright — they convert nightly markets into mid- and long-stay markets, as New York's minimum-stay data makes unmistakably clear.
Contrast those numbers with lightly regulated Gatlinburg, Tennessee, where the median minimum stay is 2.1 nights and no primary residence rule applies, or Nashville, where the median is 5.6 nights under a moderate regulatory framework. The difference is not guest preference — it is the regulatory floor.
New York City's Local Law 18, enforced September 2023, is the clearest evidence of what rigorous primary residence enforcement does to supply. Under Local Law 18, stays under 30 nights require the host to be present — a condition functioning as a de facto primary residence rule for short stays.
San Francisco tells a quieter version of the same story. With 4,355 active listings and $273.50 ADR — second highest in the AirROI basket behind San Diego — thin permitted supply supports above-market rates even as investor-owned nightly rentals remain prohibited.
Portfolio limitations. The rule is explicitly designed to prevent multi-property STR operations. Investors who want scale must operate in jurisdictions that do not apply the requirement.
Compliance burden. Annual documentation, affidavits, and permit renewals add real administrative overhead. Some cities audit prior-year records — if your utility bills show extended absences, the permit renewal can be denied.
Cities match the rental property address against voter registration, driver's license, tax returns, utility bills, and in some cases homestead exemption records. Many require an annual affidavit under penalty of perjury and mandate that the host have occupied the property for a minimum period — often 60 to 270 days — before the permit application is accepted.
In cities with primary residence requirements, no — the permit is issued only for the property where you actually live. Investment properties and vacation homes are classified as non-owner-occupied and are ineligible. A handful of jurisdictions issue a limited number of non-primary-residence permits, but availability is tightly capped and often subject to a waitlist.
A primary residence is the home where you live for the majority of the year — typically 270 or more days — and it must match the address on your government-issued ID, tax returns, and voter registration. A vacation property or investment property does not qualify, even if you stay there regularly.
Directly. They cap the supply of legal listings, which can reduce competition and support ADR in heavily regulated markets, but they also cap the number of nights you can rent while away. AirROI data shows New York's median minimum stay rose to 25.8 nights after Local Law 18 enforcement — a direct consequence of the primary residence and host-present rules reducing short-stay supply by roughly 90%.
Yes. The rule has spread from major coastal cities to second-tier markets since the mid-2010s. Several cities have strengthened enforcement through platform data-sharing agreements that flag listings where the permit address differs from the host's documented residence.
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