Boulder vs Las Vegas: ADU, STR & Home Business Rules Compared (2026)
Compare ADU owner-occupancy and parking rules, short-term rental licensing, and home business rules between Boulder, CO and Las Vegas, NV. Colorado's HB24-1152 ADU preemption law drives the biggest differences.
Side-by-Side Comparison
Boulder vs Las Vegas
| BoulderCO | Las VegasNV | |
|---|---|---|
| ADUs Allowed? | Yes — required by right under Colorado HB24-1152 (CRS §29-35-403) | Yes — permitted with a Special Use Permit (Las Vegas Unified Development Code §19.12.070) |
| Owner Occupancy Required? | No ongoing requirement — Colorado HB24-1152 prohibits requiring an ADU to be owner-occupied, though the city may require a one-time residency check at application (CRS §29-35-403(2)(b)) | Conditional — the ADU may not be offered or occupied as a rental unit unless the principal dwelling is owner-occupied (Las Vegas UDC §19.12.070) |
| Parking Required? | No — Colorado HB24-1152 prohibits requiring a new off-street parking space for an ADU, with limited exceptions (CRS §29-35-403(2)(a)) | Yes — one additional parking space beyond the number normally required (Las Vegas UDC §19.12.070) |
| STR Allowed? | Yes — requires a city-issued short-term rental license (Boulder Municipal Code §10-3-19) | Yes — permitted as a conditional use (Las Vegas UDC §19.12.070) |
| Registration Required? | Yes — a short-term rental license is required (Boulder Municipal Code §10-3-19) | Yes — a business license is required to operate (Las Vegas UDC §19.12.070) |
| Registration Type | Short-Term Rental License (Boulder Municipal Code §10-3-19) | Business license, including payment of applicable room taxes and licensing fees (Las Vegas UDC §19.12.070) |
| Home Business Allowed? | Yes — allowed by right if it meets accessory-use standards (Boulder Municipal Code §9-6-3(o)) | Yes — permitted with a Home Occupation Permit (Las Vegas UDC §19.16.180) |
| City Permit Required? | No — home occupations meeting the standards are allowed by right with no separate permit (Boulder Municipal Code §9-6-3(o)) | Yes — a Home Occupation Permit is required (Las Vegas UDC §19.16.180) |
Key Differences
Boulder's ADU rules are shaped directly by Colorado's HB24-1152 (signed May 13, 2024), which requires the city to allow at least one ADU per single-family lot by right and prohibits both an ongoing owner-occupancy requirement and a new off-street parking mandate for the unit (CRS §29-35-403) — Boulder may only check residency once, at application. Las Vegas takes a case-by-case approach: an ADU requires a Special Use Permit, the owner-occupancy condition only applies if the ADU is rented out, and one additional parking space is required beyond the normal minimum (Las Vegas Unified Development Code §19.12.070). Both cities allow short-term rentals with a licensing requirement — Boulder's short-term rental license (Municipal Code §10-3-19) and Las Vegas's business license with room-tax compliance (UDC §19.12.070) — so STR access is not a major differentiator here. Home businesses diverge on the permit question: Boulder allows a qualifying home occupation by right with no separate permit, while Las Vegas requires a Home Occupation Permit before operating.
Cost Comparison
Boulder's ADU building permit fees run roughly $1,500–$5,000, and Boulder Valley School District impact fees of about $3,000–$6,000 may apply; Colorado HB24-1152 explicitly permits municipalities to continue charging impact fees for ADUs (CRS §29-35-403(3)(f)). Las Vegas ADU building permit fees run roughly $500–$2,500 based on valuation, with Clark County Water Reclamation District and traffic impact fees of about $1,500–$5,000 and Clark County School District development fees of roughly $1,000–$2,500. Both ranges are drawn from each city's cached fee schedule; confirm current figures with Boulder Planning and Development Services or Las Vegas Building and Safety before budgeting.
Our Verdict
Boulder offers more legal certainty for building the ADU itself — a state-backed right to build, no ongoing owner-occupancy requirement, and no added parking mandate. Las Vegas requires more upfront process (a Special Use Permit) and conditions the owner-occupancy rule on rental use, but both cities are STR-friendly with a license in hand. For a straightforward build with the fewest ADU-specific hurdles, Boulder's state-preempted framework is the stronger choice; Las Vegas's Special Use Permit process adds a layer of discretionary review that Boulder's ministerial approval avoids.
Explore Each City
Frequently Asked Questions
Does Colorado's HB24-1152 mean Boulder cannot require any owner-occupancy check for an ADU?
Not quite. HB24-1152 (CRS §29-35-403(2)(b)) prohibits an ongoing owner-occupancy requirement, but Boulder may require a property owner to demonstrate residency at the time the ADU application is submitted.
Do I need a permit to build an ADU in Las Vegas?
Yes. Las Vegas requires a Special Use Permit for a Residential Accessory Dwelling Unit (Las Vegas Unified Development Code §19.12.070), which involves Planning Commission review rather than Boulder's more ministerial process under Colorado state law.
Which city requires more parking for an ADU, Boulder or Las Vegas?
Las Vegas requires one additional parking space beyond the normal minimum (Las Vegas UDC §19.12.070). Boulder cannot require any new off-street parking for an ADU under Colorado HB24-1152 (CRS §29-35-403(2)(a)), with limited exceptions.
Do both cities allow short-term rentals?
Yes. Boulder requires a short-term rental license (Municipal Code §10-3-19) and Las Vegas requires a business license including room-tax compliance for a Short-Term Residential Rental (UDC §19.12.070).
Source: PropertyZoned Editorial Research. Last verified July 3, 2026.