Boulder

Unincorporated Summit County has strictly regulated STRs via a two-tier overlay system: 'Resort' zones have unlimited permits, while 'Neighborhood' zones are subject to strict precinct caps and a 35-night annual rental limit. All hosts must obtain an annual permit and collect a 2% STR Excise Tax in addition to standard sales taxes.

Short-term rentals in unincorporated Eagle County require an annual license and are subject to a 2% County Lodging Tax. The regulations, established in 2022, focus on parking, life safety, and ensuring a local contact is available to respond to complaints within 60 minutes.

Short-term rentals in unincorporated La Plata County require a Vacation Rental Permit and must comply with Chapter 90, Article IV of the Land Use Code. Permits are tied to specific occupancy limits based on septic capacity and require wildfire mitigation and bear-proof trash containment.

The City of Aspen requires all short-term rentals to obtain an annual permit categorized into three types: Classic, Lodge, or Investment. Stricter regulations and a significant STR excise tax (5-10%) were implemented following Measure 2A in 2022.