Boulder vs Provo: ADU, STR & Home Business Rules Compared (2026)
Compare ADU owner-occupancy and parking rules, short-term rental permits, and home business rules between Boulder, CO and Provo, UT. Colorado's HB24-1152 ADU preemption law drives the biggest differences.
Side-by-Side Comparison
Boulder vs Provo
| BoulderCO | ProvoUT | |
|---|---|---|
| ADUs Allowed? | Yes — Boulder must allow at least one ADU per single-unit detached dwelling lot (Colorado HB24-1152, CRS §29-35-403) | Yes — permitted use under Provo City Code Title 14 and Utah Code §10-9a-530 |
| Owner Occupancy Required? | No ongoing requirement — Colorado HB24-1152 prohibits requiring an ADU (or the dwelling on the same lot) to be owner-occupied, though the city may require a one-time residency check when the application is submitted (CRS §29-35-403(2)(b)) | Yes, ongoing — either the main dwelling unit or the ADU must be occupied by an owner occupant (Provo City Code §14.30.030(4)(a)) |
| Parking Required? | No — Colorado HB24-1152 prohibits requiring a new off-street parking space in connection with building or converting an ADU, with limited exceptions (CRS §29-35-403(2)(a)) | Yes — at least 4 off-street parking spaces required for a dwelling with an ADU (Provo City Code §14.30.030(5)) |
| STR Allowed? | Yes — requires a city-issued short-term rental license (Boulder Municipal Code §10-3-19) | No — short-term rentals are prohibited in agricultural and residential zones (Provo City Code §6.33.020(2)) |
| Registration Required? | Yes — a short-term rental license is required (Boulder Municipal Code §10-3-19) | No — STR use is already banned in residential zones, so no license scheme applies there |
| Registration Type | Short-Term Rental License (Boulder Municipal Code §10-3-19) | STR business license required where STR use is otherwise allowed (Provo City Code §6.33.020) |
| 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 (Provo City Code §14.41.020) |
| 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 must be obtained before operating (Provo City Code §14.41.020) |
Key Differences
Boulder and Provo represent two very different regulatory philosophies for ADUs, and the gap comes directly from state law. Colorado's HB24-1152 (signed May 13, 2024) requires every Colorado municipality with population over 1,000 to allow at least one ADU per single-family lot by right, and it specifically prohibits municipalities from requiring an ADU to be owner-occupied or from requiring new off-street parking for it — Boulder may only ask a property owner to confirm residency at the time the application is submitted, not on an ongoing basis (CRS §29-35-403). Provo, with no equivalent statewide ADU preemption, requires ongoing owner-occupancy of either the main dwelling or the ADU and mandates four off-street parking spaces for the lot. Short-term rentals reverse the pattern: Boulder permits STR use citywide with a city-issued license (Boulder Municipal Code §10-3-19), while Provo prohibits short-term rentals outright in agricultural and residential zones (Provo City Code §6.33.020(2)). Home businesses are allowed in both cities, but Boulder treats a qualifying home occupation as allowed by right with no separate permit, while Provo requires a Home Occupation Permit before starting.
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 to new units; Colorado HB24-1152 explicitly permits municipalities to continue charging impact fees for ADUs (CRS §29-35-403(3)(f)). Provo's ADU building permit fees are based on construction value and typically run $400–$2,000, plus utility connection fees, with the city's consolidated fee schedule (an external document) governing current totals. Both fee ranges are drawn from each city's cached fee schedule and should be confirmed directly with Boulder Planning and Development Services or Provo Development Services before budgeting.
Our Verdict
Boulder offers substantially more legal certainty for ADU builders thanks to Colorado's HB24-1152 preemption — no ongoing owner-occupancy requirement, no added parking mandate, and a state-backed right to build. It's also the better choice if short-term rental income is the goal, since Provo bans STR use in residential zones entirely. Provo's tighter ADU rules (ongoing owner-occupancy, 4-space parking) suit an owner who wants a family or long-term-tenant ADU rather than a rental-income unit, and its home business framework, while requiring a permit, is a well-worn, predictable process. For maximum ADU and STR flexibility, Boulder is the clear winner; for owner-occupied family housing, Provo's rules are more restrictive but still workable.
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 it does allow Boulder to require a property owner to demonstrate residency at the time the ADU application is submitted — a one-time check, not a continuing condition.
Can I rent out my ADU short-term in Provo?
No. Provo prohibits short-term rentals in agricultural and residential zones under City Code §6.33.020(2), so an ADU in a residential zone cannot be used as a short-term rental.
Do I need a permit to run a home business in Boulder?
Not a separate one, as long as the home occupation meets Boulder's accessory-use standards under Municipal Code §9-6-3(o) — it's allowed by right. Provo, by contrast, requires you to obtain a Home Occupation Permit before starting (Provo City Code §14.41.020).
Which city requires more parking for an ADU, Boulder or Provo?
Provo requires significantly more — at least 4 off-street parking spaces for a lot with an ADU (Provo City Code §14.30.030(5)). Boulder cannot require any new off-street parking for an ADU under Colorado HB24-1152 (CRS §29-35-403(2)(a)), with limited exceptions.
Source: PropertyZoned Editorial Research. Last verified July 3, 2026.