Caldwell, ID Short-Term Rentals: Registration Rules (2026)

No short-term rental registration program is found in Caldwell's City Code. Under Idaho Code 67-6539, short-term rentals are a residential land use, and House Bill 583 (signed March 16, 2026; effective July 1, 2026) expressly prohibits cities and counties from requiring a license, fee, permit, certification, or registration to operate a short-term rental. That removes any path for a Caldwell STR registry. The only registration most operators encounter is with the Idaho State Tax Commission for lodging taxes. Hosts who rent exclusively through a registered short-term rental marketplace such as Airbnb or Vrbo do not need their own Idaho seller's permit, because the marketplace is the registered retailer and collects and remits Idaho sales tax and the travel and convention tax. Hosts who book guests directly (outside a marketplace) must register as a retailer with the Tax Commission and collect and remit those taxes themselves. Beyond tax registration, operators remain subject to generally applicable city rules that are not STR-specific, including the property maintenance and nuisance provisions in the City Code. There is no occupancy registry, no annual renewal, and no city application unique to short-term rentals in Caldwell.