Longmont's Short-Term Rentals: The Rules That Matter

Every city handles short-term rentals a little differently. In Longmont, Colorado, there are 10 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Noise Rules

Longmont does not codify short-term-rental-specific quiet hours; STR guests are subject to the same general noise ordinance as every other resident, located in Longmont Municipal Code Title 10, Chapter 10.20 (Offenses Against the Public Peace). The ordinance makes it unlawful to make noise audible at a distance of at least 25 feet from the source between 10:00 p.m. and 7:00 a.m. unless the noise is contained entirely within the confines of private property the person has a right to occupy. Daytime noise is also regulated against an 'A'-weighted sound-pressure standard. Repeat noise violations originating from a licensed STR are reported to Code Enforcement and may be considered in license-renewal review.

Key details: STR-Specific Quiet Hours: Not codified; general ordinance applies. Governing Chapter: LMC Title 10, Chapter 10.20 (Offenses Against the Public Peace). Nighttime Window: 10:00 p.m. to 7:00 a.m.. Plain-Audibility Distance: 25 feet from noise source. Measurement Standard: 'A'-weighted sound pressure level (dB(A)).

Violations of LMC Chapter 10.20 are misdemeanors or municipal infractions handled through Longmont Municipal Court, with fines and (for repeat offenders) potential jail penalties as set by the chapter's penalty provisions. Officers may cite the person making the noise, the property occupant, and in appropriate cases the operator of the property. For STRs specifically, repeated documented noise complaints tied to a licensed STR address are tracked by Code Enforcement and may be raised during the annual license renewal as evidence the rental is creating nuisances for the surrounding neighborhood; the city's STR program is structured around protecting neighborhoods from STR-generated nuisance. Calls about active disturbances should go to Longmont Public Safety non-emergency dispatch; pattern complaints route to Code Enforcement at 303-651-8695 or code.enforcement@longmontcolorado.gov.

Parking Rules

Longmont's Short Term Rental program does not impose an STR-specific off-street parking ratio beyond the parking minimums that already apply to the dwelling under the Land Development Code (LMC Title 15). STR guests must comply with the citywide on-street parking, time-limit, and overnight-parking rules in LMC Title 11 (Traffic) the same as any other resident or visitor. STR operators are responsible for disclosing on-site parking availability to guests, accommodating guest vehicles within the property's existing off-street capacity, and ensuring guest parking does not block driveways, fire hydrants, sidewalks, or violate any posted neighborhood restrictions.

Key details: STR-Specific Parking Ratio: Not codified. Base Dwelling Parking Standard: LMC Title 15, Chapter 15.04 (Use Regulations). On-Street Parking Authority: LMC Title 11 (Traffic). RV/Trailer Storage: Subject to Title 11 on-street restrictions. Guest Parking Disclosure: Operator responsibility (program guidance).

On-street parking violations by STR guests (blocking a driveway, parking within prohibited distances of a fire hydrant or intersection, violating a posted neighborhood time-limit zone, parking against the direction of traffic) are enforceable under LMC Title 11 (Traffic) by Longmont Public Safety, with parking citations and (for serious obstructions) tow and impound remedies. Failure of the STR operator to provide the off-street parking required for the dwelling under LMC Title 15 (for example, by converting a required parking space to other use) is a Title 15 zoning violation enforceable by Code Enforcement. Patterns of guest parking complaints tied to a licensed STR are documented by Code Enforcement and may be raised at annual license renewal as evidence the STR is creating ongoing nuisance for neighbors, even if no single incident rises to a citable level.

Permit Requirements

The City of Longmont requires every short term rental (rental of an entire dwelling or individual rooms for fewer than 30 consecutive days) to hold both a Short Term Rental (STR) license and a separate Sales and Use Tax license before advertising or accepting bookings. Only City of Longmont residents are eligible, only someone with at least 50% ownership of the dwelling (or their representative) may apply, and a Longmont resident may operate a maximum of one investment dwelling as an STR in addition to their primary residence. The STR license costs $100 to apply and $100 to renew annually; the Sales and Use Tax license carries a one-time $25 processing fee. Applications are filed online through the Accela Citizen Access (ACA) portal or in person at the Development Services Center, 385 Kimbark Street. Operating an STR without a current license is enforceable at up to $500 per day plus a possible summons.

Key details: STR License: Required for all rentals under 30 days (LMC, City program page). Initial License Fee: $100. Annual Renewal: $100. Sales & Use Tax License: $25 one-time processing fee (required separately). Eligibility: City of Longmont residents only; 50%+ owner or representative.

Operating a short term rental without a current Longmont STR license, or without the required Sales and Use Tax license, is a violation of the Longmont Municipal Code subject to fines of up to $500 per day and/or issuance of a summons to court. Code Enforcement (303-651-8695, code.enforcement@longmontcolorado.gov) investigates complaints about unlicensed STRs identified through neighbor reports, online listing audits, or sales-tax-data cross-referencing. Operating an STR in N-PE or N-PF zones, exceeding the one-investment-dwelling cap per resident, or operating a second STR on the same R-RU/R-SF street segment without conditional use approval are also actionable violations. Failure to renew the license annually invalidates the license and exposes the operator to the same daily fine. Non-resident owners are categorically ineligible, so listings tied to out-of-city ownership records may be referred to Code Enforcement on that basis alone. Violations may also trigger parallel enforcement under the City's Sales and Use Tax provisions and under Chapter 10.20 (Offenses Against the Public Peace) if noise or nuisance accompanies the operation.

Compared to other cities, Longmont takes a harder line on permit requirements. The enforcement and penalty structure reflects that.

Taxes & Fees

Short-term rentals in Longmont collect a stack of state, regional, county, and city sales/lodging taxes plus a separate City of Longmont Lodger's Excise Tax. The City's lodger tax rate is 2.00% on the full asking price (including cleaning and other fees) for any rental of less than 30 consecutive days. City of Longmont sales tax of 3.53% also applies, on top of the 2.90% Colorado state sales tax, 1.00% RTD (Regional Transportation District) tax, 0.10% Scientific and Cultural Facilities District tax, and Boulder County's 1.335% sales tax, for a combined approximate rate of 10.865% (8.865% general sales tax + 2% lodger excise) on each STR stay. STR operators must hold a City Sales and Use Tax license and file Lodger tax returns monthly through longmont.munirevs.com.

Key details: City of Longmont Sales Tax: 3.53%. Colorado State Sales Tax: 2.90% (CRS Title 39). RTD Sales Tax: 1.00%. Cultural District Tax (SCFD): 0.10%. Boulder County Sales Tax: 1.335%.

Failure to register for the City of Longmont Sales and Use Tax license, to collect the 2.00% Lodger's Excise Tax, or to remit either tax by the 20th of the following month is enforceable by the City of Longmont Sales Tax Division under LMC Title 4 with interest, late penalties, and tax liens as authorized by the chapter. Failure to remit the 2.90% Colorado state sales tax (and the RTD/SCFD/county add-ons collected through the state-administered system) is enforceable by the Colorado Department of Revenue. Failure to collect or remit Lodger tax is treated as evading a tax on the guest's room rental and exposes the operator to back-tax assessment plus penalties; sales-tax non-compliance is also a documented ground on which Code Enforcement may refer an STR for license review. Platform-collected tax does not relieve the operator of the obligation to maintain accurate records and file returns; the operator must reconcile what the platform collected against what was actually due across the stack.

This is not one of those rules that cities tend to ignore. Longmont actively enforces its taxes & fees requirements.

Occupancy Limits

The Longmont Short Term Rental program limits the maximum number of guests in an STR to two persons per legal bedroom plus two additional occupants. A three-bedroom STR is therefore capped at eight guests, a four-bedroom at ten, and so on. Only rooms originally constructed and code-conforming as bedrooms count toward the count, and any dwelling with more than five bedrooms rented for short-term rentals must be equipped with an approved fire suppression (sprinkler) system. The whole dwelling can only be rented to one group at a time; the occupancy cap is not a per-room figure.

Key details: Occupancy Formula: 2 persons per legal bedroom + 2 additional. 3-Bedroom STR Cap: 8 guests (city's worked example). Sprinkler Threshold: More than 5 rented bedrooms triggers required sprinkler system. Legal Bedroom Requirement: Originally constructed as bedroom; meets egress, smoke/CO detector, permit standards. Egress Window Minimums: 20" W x 24" H; 5.7 sq ft openable (5.0 sq ft at/below ground); 48" max sill height.

Exceeding the two-per-bedroom-plus-two occupancy cap is a violation of the STR license conditions and is enforceable by Code Enforcement (303-651-8695) with referral to the city's license suspension/non-renewal authority. Operating an STR with more than five rented bedrooms without an approved fire suppression sprinkler system is a fire/life-safety violation enforceable by the Longmont building official and fire authority, in addition to STR license consequences. Counting non-conforming rooms (without egress windows, without smoke detectors, in unpermitted basement finishes) as bedrooms is a misrepresentation that can void the STR license. Renting individual rooms when the owner/agent/property manager is not residing on-site during the rental is a categorical violation of the STR program's hosted-rental rule. All violations may trigger the standard penalty of up to $500 per day plus a possible court summons.

Night Caps

Longmont does not impose a fixed annual cap on the number of rental nights a licensed short-term rental may host. There is no '90-day,' '120-day,' or '180-day' booking limit codified for hosted or unhosted STRs. Instead, the city controls STR scale through (1) a one-investment-dwelling-per-resident cap, (2) a density rule in the Residential Rural (R-RU) and Residential Single Family (R-SF) zones limiting STRs to one per street segment of a block unless conditional use approval is granted, and (3) an annual license renewal process that evaluates ongoing compliance and nuisance history. A licensed STR may book up to 365 nights per year as long as it complies with occupancy, insurance, and tax obligations.

Key details: Annual Night Cap: None codified. Investment-Dwelling Cap: 1 per Longmont resident. Density Rule (R-RU/R-SF): 1 STR per street segment of block; additional requires conditional use approval. Conditional Use Process: Pre-application meeting + neighborhood meeting + Planning & Zoning hearing. City Council Appeal: Available on conditional use decisions.

Operating a second STR on the same R-RU or R-SF street segment without conditional use approval is a violation enforceable through STR license denial or revocation and the standard $500/day penalty. Holding more than one investment-dwelling STR license per resident is a categorical violation - the city tracks licenses by applicant and address. Falsely representing that no other STR is operating on the same street segment is a material misrepresentation that may void the license. The annual renewal is not automatic; an operator with documented pattern complaints (noise, parking, occupancy violations, sales-tax non-compliance) may be denied renewal even if the current license is otherwise in good standing. Because there is no annual night cap, there is no codified penalty for 'exceeding' a night limit, but operating without a current license at any point in the calendar year exposes the operator to the standard daily fine.

If you are coming from a city with tighter rules, you will find Longmont gives residents more flexibility on night caps.

Host Presence Rule

Longmont allows two STR configurations. Whole-dwelling STRs may be operated unhosted by a Longmont resident owner (the resident may rent the entire dwelling to one group at a time without being present), subject to all other STR rules. Room-by-room STRs - renting individual rooms within an owner-occupied dwelling - are allowed only when the owner, agent, or property manager resides and is present at the dwelling during the rental period. There is no across-the-board owner-on-site requirement for every STR night, but room rentals categorically require hosted operation.

Key details: Whole-Dwelling Host Presence: Not required; unhosted allowed for resident owners. Room-by-Room Host Presence: Required - owner, agent, or property manager must reside and be present. One-Group Rule: Whole-dwelling rentals limited to one group at a time. Eligible Operators: City of Longmont residents only. Investment-Dwelling Cap: 1 per resident (in addition to primary residence).

Operating a room-by-room STR (renting individual bedrooms separately within a dwelling) when no owner, agent, or property manager is residing and present at the dwelling during the rental is a categorical violation of the STR license. Code Enforcement (303-651-8695) investigates complaints from neighbors or guests indicating that room rentals are occurring with no on-site responsible person and may pursue license suspension or revocation in addition to the standard $500/day penalty. Operating a whole-dwelling rental that effectively serves multiple unrelated parties simultaneously (treating one license as multiple concurrent room rentals) breaches the 'one group at a time' rule and is enforceable as a license violation. Designating an absentee 'property manager' who is not actually resident at the dwelling during room rentals is a misrepresentation and exposes the operator to the same enforcement.

Insurance Requirements

Longmont requires every short-term rental to be covered by liability insurance with minimum limits of $1,000,000. The coverage may take the form of property liability insurance, commercial liability insurance, or an endorsement of the operator's homeowner's policy specifically covering short-term rental activity. Standard homeowner's policies usually exclude business activity, so most operators must add an endorsement or obtain a separate commercial STR policy. Proof of qualifying coverage is part of the STR license application and renewal process.

Key details: Minimum Liability Coverage: $1,000,000. Acceptable Policy Forms: Property liability, commercial liability, or homeowner's endorsement. Homeowner's Policy Caveat: Standard policies exclude business activity; endorsement required. Proof Required: At application and at each annual renewal. Submission Method: Accela Citizen Access (ACA) portal.

Failure to maintain $1,000,000 minimum liability insurance during the STR license term is a license-condition violation enforceable by Code Enforcement (303-651-8695). Submitting expired, fraudulent, or insufficient proof of coverage at application or renewal is a material misrepresentation that may trigger license denial, suspension, or revocation, and any resulting STR operation without a valid license is enforceable at up to $500 per day plus a possible court summons. Lapsed coverage discovered after an incident (a guest injury, property damage, fire) shifts financial liability directly to the operator and may also be raised in any subsequent license enforcement action. Operators are responsible for ensuring the policy form actually covers paid short-term rental activity - many homeowner's policies exclude it by default, and a policy that excludes the activity does not satisfy the city's requirement even if the face limit is $1,000,000.

Compared to other cities, Longmont takes a harder line on insurance requirements. The enforcement and penalty structure reflects that.

Registration Rules

Registering a short-term rental in Longmont is a four-step sequence: (1) create an Accela Citizen Access (ACA) account at the city's permit portal, (2) apply for a City of Longmont Sales and Use Tax license through the Sales Tax Office (303-651-8672) - $25 one-time processing fee, (3) apply for the Short Term Rental license through ACA ($100 initial), and (4) complete all submission and renewal activity through the ACA portal. Application requires proof of City of Longmont residency, proof of at least 50% ownership of the dwelling, proof of $1,000,000 minimum liability insurance, and self-certification (or city inspection) of building/life-safety conditions. Renewal is annual at $100 and requires updated proof of all of the above plus a complaint-history review by the city.

Key details: Submission Portal: Accela Citizen Access (ACA). Required Licenses: 2 - Sales and Use Tax license + STR license. STR License Fee (Initial / Renewal): $100 / $100. Sales Tax License Fee: $25 one-time processing. Required Documentation: Longmont residency, 50%+ ownership, $1M insurance, life-safety attestation.

Failure to register before listing or accepting bookings is a violation of the Longmont Municipal Code enforceable at up to $500 per day plus a possible court summons. Submitting a license application with false or expired documentation (lapsed insurance, fabricated ownership records, fake residency credentials, self-certifying building criteria that are not actually met) is a material misrepresentation that may trigger immediate license denial or revocation and additional municipal enforcement. Failure to obtain the Sales and Use Tax license alongside the STR license is itself a violation, even if the STR license is approved. Failure to renew annually invalidates the license on the renewal anniversary and exposes the operator to the daily fine. Code Enforcement (303-651-8695) actively monitors listing platforms and may cross-reference active listings against the city's licensed-STR database; unlicensed operations identified through this audit are pursued under the same penalty structure.

This is not one of those rules that cities tend to ignore. Longmont actively enforces its registration rules requirements.

Primary-Residence-Only Rule

Longmont's STR program restricts licenses to City of Longmont residents only. A resident may operate an STR in their primary residence and may also hold one additional STR license on a second (investment) dwelling they own within Longmont. Out-of-city owners, out-of-state investors, and corporate or LLC owners whose principal operator is not a Longmont resident are categorically ineligible. Each resident is capped at one investment-dwelling STR, and only a person with at least 50% ownership of the dwelling (or their authorized representative) may apply. ADUs generally cannot be used as STRs, removing another common absentee-investor vehicle.

Key details: Residency Requirement: City of Longmont residents only. Ownership Threshold: At least 50% ownership of the dwelling (or authorized representative). Investment Dwelling Cap: 1 per resident, in addition to primary residence. Out-of-State Investors: Categorically ineligible. Corporate/LLC Owners: Must have Longmont resident principal operator.

Holding or applying for an STR license without satisfying the City of Longmont residency requirement is a categorical violation enforceable through license denial or revocation and the standard $500/day penalty if operation occurs. Holding more than one investment-dwelling STR license per resident is also categorical; the city tracks licenses by applicant and will deny or revoke duplicate licenses. Submitting falsified residency or ownership documentation is a material misrepresentation that may trigger immediate revocation, additional municipal enforcement, and referral for further legal action. Operating through a corporate or LLC structure whose principal operator is not a Longmont resident does not satisfy the residency requirement - the city looks through the entity to the actual operator. Code Enforcement (303-651-8695) audits ownership records, residency credentials, and platform listings to identify ineligible-operator STRs and pursues them under the standard penalty structure.

Compared to other cities, Longmont takes a harder line on primary-residence-only rule. The enforcement and penalty structure reflects that.

The Bottom Line

Longmont is tougher than many cities when it comes to short-term rentals. Out of the 10 rules covered here, 5 are rated strict. If you are a homeowner, renter, or business owner in Longmont, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.

This guide is based on Longmont's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.