Boulder Short Term Rental Regulation: A Guide For Airbnb Hosts

Do you own a place in Boulder and you're wondering whether you can put it on Airbnb or Vrbo? Well, the good news is, you can, as long as it's the home you live in. Boulder allows short-term rentals of an owner's principal residence, licensed through the city, which is a real difference from an outright ban. It's also a lot narrower than an open investor market, so it's worth understanding exactly where the line sits before you list anything.

The city's short-term rental license has been on the books since Ordinance No. 8050 passed city council on Sept. 29, 2015, and took effect Jan. 4, 2016. What's changed heading into 2026 is the detail: a new license type built for the Sundance Film Festival, a state law that rewrote how occupancy limits work, and a tax picture that's easy to underpay if you look at only one line of it. This guide covers Boulder city limits specifically, not unincorporated Boulder County, which runs its own separate ordinance. Our Colorado short-term rental guide covers that statewide layer in full, if you're weighing a Boulder property against somewhere else in the state.

So let's walk through what it takes to do this properly: who qualifies for a Boulder license, what it costs, the taxes that stack on top, how hard the city enforces its own rules, and who to call when something doesn't fit the form. Every figure below comes from the City of Boulder's or the State of Colorado's own pages, read directly and checked as of July 2026.

What are Short Term Rental (Airbnb, VRBO) Regulations in Boulder,Colorado?

Two things make Boulder's rule unusual, and once you see them the rest of this guide makes a lot more sense.

The first is that a short-term rental in Boulder must be the owner's principal residence, defined on the city's own rental licensing page as "the dwelling unit in which a person resides for more than one-half of the year." A short-term rental itself is any stay of 29 days or fewer. Rent it for 30 nights or longer and you've left this whole framework behind, since that's an ordinary residential lease instead.

The second is what that principal-residence test does not require. It's a where-you-live-most-of-the-year test, not a you-must-be-home-during-every-booking test. Boulder never requires the host to be physically present while guests are staying, unlike cities that only permit a hosted room-share. So a Boulder homeowner who lives in the house 200-plus nights a year can legally rent the whole place, guests included, for the rest of the calendar, provided they hold the license and stay under the principal-residence threshold. That's a meaningfully more open model than a hosted-only city, even though it's still nowhere near an anything-goes investor market.

Both requirements sit on top of Boulder Revised Code, Title 10, Chapter 3 (rental licensing generally) and Title 3, Chapter 15 (the short-term rental tax specifically). The city's own plain-language pages are what this guide draws from directly, since Boulder's code library blocks automated reading. A few more baseline rules round out the picture:

• The owner must be a natural person, a trust, or a nonprofit, never an LLC, corporation, or limited partnership, and must hold at least 50% ownership with a name matching the deed. Application page
• Only one license per owner or property. A house with an accessory dwelling unit gets one license total, either for the main house or the ADU, not both.
• Accessory dwelling units are excluded from short-term rental unless both the ADU and the license were already legally established before Jan. 3, 2019. A grandfathered ADU can still only rent short-term for up to 120 days a year.
• Permanently affordable or deed-restricted units are never eligible, full stop.

I didn't find a separate short-term-rental zoning overlay in the materials the city publishes. The eligibility test is about who owns the home and where they live, not which zoning district it sits in, though your own HOA or deed covenants can still shut the door even where the city says yes.

Starting a Short Term Rental Business in Boulder

Since the principal-residence rule is doing most of the work here, it's worth being honest about what kind of business this is. Boulder isn't a market where you buy a second property, furnish it, and run it as a standalone Airbnb business the way you might in a wide-open vacation town. Every owner gets exactly one license, tied to the home they live in, so there's no scaling this into a portfolio the way a market like Scottsdale allows.

What you can build is still useful, though. Own your home, live there more than half the year, and you can rent the whole place short-term for the rest of your calendar, whether that's weekends away, a few weeks of travel, or a standing pattern around your own schedule. That's real income on a property you already own, not a side hustle limited to a spare bedroom. If your numbers depend on nightly-rate demand around CU Boulder events, hiking season, or a conference calendar, run the address through BNBCalc before you commit to the paperwork, so you know what those nights are worth.

One new door opened in 2025: the Festival Lodging Rental License, created after Boulder won the bid to host the Sundance Film Festival starting January 2027. The city expects roughly 85,000 attendees against about 2,900 hotel rooms citywide, so council created a license that drops the owner-occupancy requirement entirely for approved festival windows. Unlike the standard short-term rental license, festival lodging is open to owners of any type, tenants with landlord consent, and even existing Long-Term Rental License holders adding festival dates on top. It's capped at 29 days a year around each approved event: Sundance, Jan. 21 to 31, 2027, is the only one currently approved, with a 10-day buffer before and 9 after. Do check it out if your Boulder property doesn't otherwise qualify as a principal residence.

If your Boulder home doesn't clear the principal-residence bar and isn't inside a festival window either, the honest next step is the 30-plus-night furnished rental market, which sits outside this whole licensing regime. That's a different business model with different economics, so it's worth running both scenarios through the numbers rather than assuming one automatically beats the other.

Short Term Rental Licensing Requirement in Boulder

Assuming your home clears the principal-residence test, there's still a real process to get through: the license itself runs through Boulder's Planning and Development Services. New applications cost $190 for the rental license plus $25 for a business license, $215 total, and renewals run $190 with no business license fee attached. Once issued, the license lasts four years, but it doesn't just sit there quietly: you have to file a Short-Term Rental Annual Affidavit plus a $20 fee every year by your license anniversary date to keep it active, and missing that affidavit gets the license revoked outright. Rental Licensing: Short-Term

To apply, you'll need proof of principal residence: a Colorado driver's license or ID card showing the property address. You'll also need to name two local contacts, separate from yourself, who can respond to the property within 60 minutes. Application page Applications go in online. Expect an email confirmation within about two weeks from [email protected], then payment through the Customer Self-Service Portal once it's processed.

The short-term license is meaningfully easier than Boulder's standard long-term rental license in one respect: no inspection is required. You self-certify that you've got smoke and carbon monoxide detectors in place, and the city takes your word for it rather than sending an inspector, unlike the long-term license, which does require a full safety inspection. That's a real time and cost saving, so don't skip the self-certification step even though nobody's coming to check.

Two grounds for denial are worth flagging before you spend the fee. First, a property that's permanently affordable or deed-restricted can never get a license, no exceptions. Second, if your building or HOA has covenants against short-term rentals, the city won't catch that for you at the application stage, so it's on you to check your own paperwork first. Since the $215 doesn't come back if you're denied, do that homework before you apply, not after.

Required Documents for Boulder Short Term Rentals

Getting the paperwork right the first time matters here, because the fee is non-recoverable if the application falls apart. Here's what the city asks for:

• Proof of principal residence, specifically a Colorado driver's license or identification card showing the rental property's address.
• Proof the applicant is on the deed, matching the name on the license application exactly.
• Names and phone numbers for two local contacts who aren't the applicant and who can reach the property within 60 minutes.
• A property map or drawing, plus a long-term rental application, for multi-unit properties. A single-family home doesn't need this extra step.
• Your own HOA covenants or lease terms reviewed in advance, since the city doesn't verify these but will hold you to them regardless.

Once the license is issued, keep the safety equipment self-certification current and make sure your advertising carries your license number, since that's a running obligation rather than a one-time box to check.

Boulder Short Term Rental Taxes

Once you're licensed and hosting, there's still tax to sort out, and Boulder's version has more layers than the license itself does. The city's own Tax Rates & Types page lays out each piece, and it's worth going through them one at a time rather than guessing at a combined number.

Tax	Rate	Collected by
City of Boulder Accommodations Tax	7.50%	City of Boulder
Colorado state sales tax	2.90%	Colorado Department of Revenue
Boulder County sales tax	1.335%	Colorado Department of Revenue
RTD (Regional Transportation District) sales tax	1.10%	Colorado Department of Revenue

Those four add up to 12.835% on a stay under 30 nights. Airbnb's own Colorado tax page points the same way: it names a "Boulder Short-Term Rental Accommodations Tax" of 7.5%, alongside the statewide 2.9% sales tax, with nothing else broken out separately for Boulder. Boulder does have a separate general city sales tax of 3.86% on its books too. Going through the city's own materials, though, I couldn't fully pin down whether that general rate stacks on top of the accommodations tax on the same short-term rental charge, or whether the accommodations tax stands in its place for lodging specifically. Do check that one directly with the city's Sales Tax staff before you file your first return, since it's the one piece of this table I couldn't confirm from a primary source.

Filing happens on two separate tracks. The city portion runs through the Boulder Online Tax System, and it requires its own City of Boulder Business License first, which carries a filing obligation even in a month you owe nothing. Sales and Use Tax How often you file depends on how much you owe on average each month: $300 or more means monthly filing, $15 to $300 means quarterly, and under $15 means annual. Mailed payments count as timely if postmarked by the 20th. The state layers, meanwhile, don't go through the city at all. State sales tax, county lodging tax where it applies, and local marketing district tax instead go through Colorado's own DR 0100, Revenue Online, or SUTS system, administered by the Department of Revenue.

Platforms handle a meaningful chunk of this automatically. Airbnb's own page confirms it collects both the 2.9% state sales tax and Boulder's 7.5% Accommodations Tax on your behalf for Boulder listings. Vrbo's help material speaks only in general terms about collecting "in required jurisdictions" without naming Boulder specifically, so treat that one as unconfirmed and check your own account settings rather than assuming it's covered. Stays of 30 consecutive days or more by a permanent resident are exempt from the sales tax layers entirely, which is one more reason the 29-day line matters so much throughout this whole framework.

Boulder wide Short Term Rental Rules

Past the license and the tax return, a handful of citywide rules apply to every host, and one of them changed meaningfully in the last two years. Boulder used to cap occupancy at three or four unrelated people depending on your zoning district, tied to Ordinance No. 8072 and BRC §9-8-5. That's no longer the operative rule. Colorado's HB24-1007, signed April 15, 2024 and effective July 1, 2024, bars any Colorado city from limiting how many people can live together based on family relationship. Boulder's own Occupancy Limits page confirms the city has administratively stopped enforcing the old unrelated-persons cap and is shifting to the International Property Maintenance Code's bedroom-size standard instead, which sets occupancy by square footage rather than by who's related to whom. If you're still budgeting around the old three-or-four-guest number, update it. The current standard is about room size, not headcount by zone.

A few more rules apply across the board:

• Your advertisement has to carry your rental license number and your maximum allowed occupancy, and that listing information has to match what you told the city.
• Boulder's noise ordinance covers daytime hours too, not just night, as of a Sept. 1, 2022 update. Amplified sound audible 200 feet or more beyond your property line is prohibited 7 a.m. to 11 p.m. in residential districts, and the older nighttime rule (100 feet, 11 p.m. to 7 a.m.) still stands.
• A public nuisance ordinance ties directly into your license. One violation now counts as a public nuisance, down from the old two-violation threshold, and a single-unit dwelling hits "chronic nuisance" status at five violations within 12 months. The city notifies owners at the email address on file with their rental license, so keep that address current even if you use a property manager.
• Bear-resistant trash containers are required for residents south of Sumac and west of Broadway, a local rule worth mentioning to guests who aren't from around here.
• Boulder's outdoor lighting ordinance sets dark-sky standards, including downward-aimed fixtures and a 3,000 Kelvin cap on bulb color temperature, which matters if you're installing new exterior lighting for a listing.

None of these are unique to short-term rentals specifically, but a guest who breaks one of them still reflects on your license, so it's worth a line in your house rules rather than assuming it'll sort itself out.

Does Boulder strictly enforce STR rules?" Is Boulder Airbnb friendly?

Given how much of this framework exists because of neighbor complaints in the first place, enforcement here isn't theoretical. Boulder's own STR ordinance exists because a surge of complaints starting in December 2014 led the city to send roughly two dozen cease-and-desist letters before council passed the licensing law in 2015. That complaint-driven pattern hasn't gone away. The city's Code Concerns page states plainly that "discovery of an unlicensed rental property will result in legal action," and complaints about an unlicensed rental or an occupancy violation both route through the same line, 303-441-1880.

What I couldn't confirm is the exact dollar penalty for operating without a license or breaking your license terms, since Boulder's code library blocks automated reading and I wasn't willing to publish a fine amount I hadn't read on an official page myself. What I can tell you with confidence is that the mechanism has teeth. The chronic nuisance ordinance covered above escalates fast: five violations in 12 months is enough to flag a single-family home, and the city estimates that's roughly the top 2% of problem properties citywide each year. That's not a lot of room for a listing that keeps generating noise or party complaints, so keep in mind that your neighbors are effectively part of your compliance record.

Yet the same city that enforces its rules is also the one that built a whole new license category to accommodate demand, rather than turning it away. Boulder had roughly 600 active short-term rental licenses as of September 2025, and the Sundance-driven Festival Lodging License shows a city willing to expand the framework when there's a genuine reason to. Read together, Boulder reads less like a market that's hostile to short-term rentals and more like one that's particular about who qualifies. Meet the principal-residence bar, keep your neighbors happy, and the city isn't looking for a reason to shut you down.

How to Start a Short Term Rental Business in Boulder

Assuming your situation fits everything above, working through these roughly in order saves you from spending money on steps that turn out not to matter.

1. Confirm the property is your principal residence in fact, and that you'll clear the "more than half the year" threshold, not merely plan to.
2. Check your own deed, HOA covenants, and lease terms for anything that prohibits short-term rentals. The city won't catch this for you, and the fee doesn't come back.
3. Gather your documents: Colorado ID showing the property address, deed proof, and two local contacts who can respond within 60 minutes.
4. Apply online through the city's rental licensing system and budget for the $215 new-application total.
5. Wait for confirmation, roughly two weeks by email, then complete payment through the Customer Self-Service Portal once your application processes.
6. Self-certify your safety equipment rather than waiting for an inspection, since none is required for short-term licenses.
7. Register for a City of Boulder Business License and get set up on the Boulder Online Tax System before your first booking, so the Accommodations Tax return isn't a scramble.
8. Add your license number to every listing, along with your maximum allowed occupancy.
9. Diarize your Annual Affidavit deadline, one year out from issuance and every year after, plus the $20 fee that goes with it.
10. If your property doesn't qualify as a principal residence, check whether a Festival Lodging License fits instead, particularly with Sundance coming in January 2027.

Who to Contact in Boulder about Short Term Rental Regulations and Zoning

Whichever step trips you up, four offices between them handle almost everything in this guide.

Rental licensing and applications

Planning & Development Services, Rental Housing Licensing issues and administers short-term rental licenses, including the Annual Affidavit and any application questions.

• Phone: 303-441-3152
• Email: [email protected]
• Mailing address: Rental Licensing Program, P.O. Box 791, Boulder, CO 80306

Complaints and code violations

For an unlicensed rental, an occupancy complaint, or a nuisance issue tied to a rental property, contact Code Concerns / Property Compliance.

• Phone: 303-441-1880 (general), 303-441-1875 (property compliance team)
• Address: 1777 Broadway, Boulder, CO 80302

City taxes

The Sales Tax & Licensing Division handles the Accommodations Tax, the city Business License, and general city sales tax filing.

• Phone: 303-441-3051
• Email: [email protected]
• Walk-in: 1136 Alpine Avenue, Boulder, CO 80304, Monday to Thursday, 9 a.m. to 3 p.m.
• Phone hours: Monday to Friday, 8 a.m. to 5 p.m.

State taxes

State sales tax, county lodging tax, and local marketing district tax questions go to the Colorado Department of Revenue.

• Taxpayer Helpline: (303) 238-7378, Monday to Friday, 8 a.m. to 4:30 p.m. MT

What do Airbnb hosts in Boulder on Reddit and Bigger Pockets think about local regulations?

Given everything above, it's worth knowing how hosts talk about operating here, and the tone splits pretty cleanly along the same line the rules do. What follows is my read of the recurring themes across public discourse in this niche, rather than a formal survey, so do weigh it accordingly.

• Investors looking for a standalone rental property tend to pass on Boulder. The one-license-per-owner, principal-residence-only structure rules out the buy-a-second-home-and-rent-it-nightly model that works in more open markets, so conversations that start with "should I buy an investment property in Boulder for Airbnb" usually end with someone pointing out that the license won't allow it.
• Owner-occupants who qualify describe the process as bureaucratic but workable. The recurring friction points are the same ones that trip up any documentation-heavy application: proving principal residence cleanly, remembering the annual affidavit, and untangling HOA restrictions the city itself doesn't check for you.
• The Sundance announcement has shifted the conversation. Hosts who didn't previously qualify for a standard license are asking about the Festival Lodging License instead, since it drops the owner-occupancy bar entirely for the festival window, and that's a new enough option that a lot of people are still figuring out exactly how it works.
• Nobody's arguing the rules go unenforced. The complaint-driven history here is well known enough that hosts generally treat the neighbor-complaint risk as real, not theoretical.

Take that last point seriously if you're weighing a Boulder property against a market with looser rules, such as our Longmont or Greeley guides just up the Front Range. The economics can still work in Boulder, particularly with the Sundance-driven demand ahead, but they work within a narrow lane rather than a wide-open one. If you want to see how that lane compares against nightly rates and demand patterns in the market itself, BNBCalc Markets breaks down Boulder's numbers at the neighborhood level.

Frequently Asked Questions

Can you legally run an Airbnb in Boulder in 2026?

Yes, but only as a licensed short-term rental of your own principal residence, meaning the home where you live more than half the year. You need a four-year city license ($215 new, $190 to renew), you're capped at one license per owner or property, and investment properties, LLC-owned homes, and most accessory dwelling units don't qualify. A new Festival Lodging License also opened up in 2025 for owners who don't otherwise qualify, tied to approved events like the Sundance Film Festival in January 2027.

How much does a Boulder short-term rental license cost?

A new license costs $215 total: $190 for the rental license plus a $25 business license fee. Renewals cost $190 with no business license fee. The license lasts four years, but you also owe a $20 Annual Affidavit fee every year by your license anniversary date to keep it active, and missing that affidavit gets the license revoked.

Can you Airbnb a property in Boulder that isn't your primary home?

Generally no, since Boulder's short-term rental license requires the property to be the owner's principal residence, defined as where they live more than half the year. The one exception is the Festival Lodging Rental License created in 2025, which drops the owner-occupancy requirement but only covers up to 29 days a year around city-approved events like Sundance.

What taxes do you owe on a Boulder short-term rental?

Expect at least 12.835% combined: a 7.50% City of Boulder Accommodations Tax plus 2.90% state, 1.335% county, and 1.10% RTD sales tax. Airbnb collects the state sales tax and the Boulder Accommodations Tax automatically; Vrbo's Boulder-specific collection isn't confirmed, so check your account. You'll also need a City of Boulder Business License and to file through the Boulder Online Tax System, with frequency based on how much you owe each month.

Does Boulder still limit occupancy to three or four unrelated guests?

No. That zone-based cap was tied to a Boulder ordinance the city has stopped enforcing since Colorado's HB24-1007 took effect July 1, 2024, banning occupancy limits based on family relationship. Boulder now applies the International Property Maintenance Code's bedroom-size standard instead, so occupancy is based on room dimensions rather than a flat headcount by zoning district.

Last verified: July 2026. Every ordinance, tax rate, state law, and contact detail in this guide links to or comes from its official source.