Boulder, Colorado Airbnb Rules & Investment Guide (2026)

City of Boulder short-term rentals require a current license before advertising, an eligible principal residence, qualifying ownership, annual certification, accurate occupancy information, tax setup, safety equipment, and compliance with private restrictions.

• Confirm the parcel is inside City of Boulder limits.
• Verify that the dwelling is the applicant’s principal residence.
• Confirm ownership form and percentage meet application rules.
• Review ADU history, permanently affordable status, and deed restrictions.
• Obtain the rental and business licenses before advertising.
• Configure City and state-administered taxes before accepting stays.

The City requires the rental property to be the owner’s principal residence. The applicant must hold at least 50% ownership, and the license name must match the deed. Eligible ownership is limited to a natural person, trust, or nonprofit organization.

• Use a Colorado driver’s license or identification card showing the property address as required proof.
• Do not assume an LLC, corporation, or limited partnership qualifies.
• Confirm that the home falls outside the permanently affordable unit category.
• Keep principal-residence evidence current for annual certification.
• Resolve title, trust, and ownership questions before applying.
• Treat a sale or missed annual affidavit as a license-continuity issue.

Boulder requires a short-term rental license before a property is advertised or rented for stays of 29 days or fewer. The City lists a $190 rental-license fee, a $25 business-license fee for new applications, and a $20 annual affidavit fee.

• Submit the City short-term rental application with all required ownership and residence evidence.
• Name two local contacts who can reach the property within 60 minutes.
• Pay fees through Customer Self Service after City processing.
• Display the issued rental housing license number in every advertisement.
• Complete the annual affidavit by the license anniversary date.
• Renew the four-year license through the current application process.

Short-term rental is an approved use for properties with an ADU only when both the ADU and short-term rental license were legally established before January 3, 2019. Permanently affordable homes cannot be used as short-term rentals.

• Confirm ADU status through City records, not listing descriptions.
• Document any claimed pre-2019 legal establishment.
• Check permanently affordable covenants and program records.
• Review association, deed, lender, and insurance restrictions separately.
• Confirm zoning and approved dwelling configuration before alterations.
• Preserve written City determinations in the property file.

Short-term rentals are owner-occupied properties and generally do not require a rental inspection. Owners self-certify smoke alarms, carbon-monoxide alarms, and other required safety equipment. Boulder continues to enforce health-and-safety occupancy standards.

• Confirm legal bedrooms and minimum room-area requirements.
• Install and maintain required smoke and carbon-monoxide alarms.
• Keep exits, stairs, guards, and emergency information serviceable.
• Do not infer capacity from platform listings or bed count.
• State the current license number and allowed occupancy in advertisements.
• Maintain a local-response and incident-escalation plan.

An entire principal residence has no separate annual rental-day cap while it continues to satisfy the principal-residence definition. A qualifying grandfathered accessory unit is limited to 120 rental days per year and stays of 29 days or fewer.

• Track rental dates and principal-residence evidence.
• Maintain two contacts able to reach the property within 60 minutes.
• Follow noise, parking, trash, nuisance, and property-maintenance rules.
• Keep advertisements synchronized with the current license.
• Do not operate a tenant-controlled short-term rental.
• Recheck City requirements before changing the dwelling or rental plan.

Boulder imposes a 7.50% Public Accommodations and Short-Term Rental Tax. The City’s 2026 table lists a 12.835% total accommodations rate including state, Boulder County, and RTD components. Boulder is home-rule and self-collected, so City taxes are remitted directly to Boulder.

• Register and file through the Boulder Online Tax System.
• Confirm Colorado Department of Revenue registration for state, county, and RTD taxes.
• Recheck rates at the time of each return.
• Map marketplace collection separately for every tax and platform.
• Do not assume a platform files every owner obligation.
• Retain returns, platform statements, exemptions, and reconciliations.

Marketwide revenue, occupancy, nightly-rate, appreciation, and return claims do not establish performance for a specific home. Principal-residence limits also make Boulder different from an unrestricted investment-property market.

• Model only the approved dwelling and legal capacity.
• Use property-specific comparable bookings and current vendor quotes.
• Include financing, insurance, utilities, cleaning, maintenance, taxes, platform fees, furnishings, license fees, and reserves.
• Account for owner-use periods and principal-residence compliance.
• Stress-test fewer booked nights and higher operating costs.
• Keep appreciation and tax-benefit assumptions separate from operating cash flow.

The deed, principal-residence evidence, application, license, annual affidavit, advertisements, safety equipment, local contacts, taxes, insurance, and private restrictions should agree before the first booking.

• City jurisdiction and property eligibility are documented.
• Ownership and principal-residence proof meet application rules.
• ADU and affordable-housing restrictions are cleared.
• Rental and business licenses are issued.
• Advertisements show the license number and allowed occupancy.
• Two local contacts and safety equipment are ready.
• City and state-administered tax accounts are configured.
• Insurance and private restrictions are cleared.

Use the office responsible for each decision and preserve written answers with the property file.

• Use Boulder Rental Licensing for eligibility, applications, annual affidavits, renewals, and complaint guidance.
• Use Customer Self Service for City license payments.
• Email salestax@bouldercolorado.gov or call 303-441-3051 for City tax filing.
• Report rental-housing violations online or call 303-441-1880.
• Contact the Colorado Department of Revenue at 303-238-7378 for state-administered taxes.
• Use STR Search property-review support to organize address-level due diligence. The City remains the legal authority.