Longmont, CO Short-Term Rentals: Registration Rules (2026)

Longmont's STR registration process is documented on the city's STR program page and in the city's 'ACA Right of Way - Guide for Short Term Rentals' PDF, both of which are the operative reference materials for applicants. Step one is creating an Accela Citizen Access (ACA) account at the city's online permit portal; ACA is the single submission channel for the STR license, related amendments, and annual renewals. Step two is obtaining a City of Longmont Sales and Use Tax license by calling the Sales Tax Office at (303) 651-8672 or visiting the Sales and Use Tax page; the license carries a one-time processing fee of $25 and is required to remit the city's 3.53% sales tax and 2.00% Lodger's Excise Tax on STR receipts. Step three is the STR license application itself, submitted through ACA at $100 initial. Required application documentation includes: proof of City of Longmont residency (driver's license or state ID showing the Longmont address); proof of at least 50% ownership of the dwelling (deed, recent property tax record, mortgage statement) or a written authorization from the owner if the applicant is a representative; proof of $1,000,000 minimum liability insurance (Certificate of Insurance, declarations page, or written endorsement form); and a building/life-safety attestation covering smoke and CO detectors, egress windows or doors per bedroom, basement-finish permits, leak-free bathrooms, accessible fire extinguisher, accessible electrical panel, proper furnace/water-heater combustion air and venting, and an evacuation route map/floor plan for guests. In most cases the applicant may self-certify the building/life-safety criteria, but the City reserves the right to inspect any STR before issuing or renewing the license. Step four is completing the application through ACA, where City staff review for completeness and notify the applicant of approval, denial, or any need for additional information. Renewal is annual at $100 through ACA, with updated proof of insurance, residency, and ownership, plus the city's review of the complaint history attached to the address.