Islip, NY Short-Term Rentals: Occupancy Limits (2026)

Islip does not publish a short-term-rental-specific occupancy cap because nightly/weekend transient rentals are banned outright under Town Code Sec. 68-650(E). For permitted rentals (14+ nights), Sec. 68-651(A)(6) requires the rental occupancy permit application to disclose 'the number of persons intended to be accommodated by, and to reside in, each such rental dwelling unit,' and Sec. 68-653 requires an on-site inspection before issuance to confirm the unit is not overcrowded or unsafe. The functional occupancy limit derives from Islip's zoning definition of 'family' in Sec. 68-649, which restricts a single-family dwelling to one family or its 'functional equivalent' - a group that lives and cooks together as a single, stable housekeeping unit, not a collection of separate roomers.

Sec. 68-663 lets the Code Enforcement Official presume an illegal multi-family/overcrowded use if a single-family dwelling has more than one kitchen or shows two or more indicators such as multiple mailboxes, doorbells, gas meters, electric meters, separate leases, or lockable internal partitions. New York State Property Maintenance Code occupancy and floor-area standards also apply as a baseline through Sec. 68-647 and Sec. 68-652.