Caldwell, ID Short-Term Rentals: Occupancy Limits (2026)

Caldwell's City Code does not impose a guest-count cap unique to short-term rentals. Because Idaho Code 67-6539 classifies short-term and vacation rentals as a residential land use subject to all zoning requirements applicable to residences, an STR's occupancy is governed by the same building-code and dwelling standards that apply to any home in the same zone, not by a separate STR formula. House Bill 583, effective July 1, 2026, confirms that cities may apply occupancy limits to short-term rentals only where those limits are tied to International Building/Residential Code standards and are applied equally to all residential properties; cities cannot single out STRs with stricter caps. In practice, the controlling limit is the safe, code-compliant occupancy of the dwelling itself (based on bedrooms, egress, and similar building-code factors), the same as for a long-term rental or owner-occupied home. Operators should size their listings to the home's legal capacity and ensure required smoke alarms, carbon monoxide detectors, and means of egress are present, since HB 583 allows those equally applied health and safety requirements. There is no Caldwell ordinance setting, for example, 'two persons per bedroom plus two' specifically for STRs.