Caldwell, ID Short-Term Rentals: Night Caps (2026)

Caldwell's City Code sets no annual or per-stay night cap on short-term rentals. Idaho Code 67-6539 prohibits cities from enacting or enforcing ordinances that have the express or practical effect of prohibiting short-term rentals, and a strict night cap can amount to such a practical prohibition. House Bill 583, effective July 1, 2026, makes the point explicit: it bars cities and counties from imposing restrictions on rental days and from capping the number or density (proximity) of short-term rentals. That means Caldwell cannot, for example, limit an STR to a set number of nights per year, require a minimum-stay length aimed only at STRs, or cap how many STRs may operate on a block or in a neighborhood. Short-term rentals may operate year-round, subject only to generally applicable rules (building, fire, noise, nuisance, traffic) that apply to all residences. This makes Caldwell's night-cap posture among the most permissive in the country, reflecting Idaho's strong statewide preemption. Operators do not need to track or report nights rented for city compliance purposes, and there is no city limit on consecutive or cumulative bookings.