Utah Building Permits, Zoning & Septic by County

Utah has 0 counties with a blanket residential building-permit exemption; 25 require residential building permits and 4 have conditional requirements.¹²³ All 29 counties have county zoning.⁴ Local or district health departments handle septic approvals, while RV and tiny-home occupancy depend on the location and use.⁵⁶⁷

At a glance

Residential building permits: 0 counties with none; 4 conditional; 25 required¹³²
County zoning: 29 counties have zoning; 0 have neither zoning nor residential building permits⁴⁸
Septic approvals: Health districts serve 22 counties; county offices serve 7⁹
RV living: 19 counties have answers: 2 allowed in specified settings, 4 temporary-only, 11 limited, 2 prohibited⁶
Tiny homes: 10 counties have answers, all limited; 19 remain unconfirmed¹⁰
Owner-builder: Contractor-license exemption available under conditions; building requirements remain¹¹
Wells: Shallow wells require a valid water right, Start Card and licensed constructor¹²
Property tax: Median county effective rate: 0.5%; median county bill: $1,603 annually¹³

Who to call

Septic permits

Utah Division of Water Quality

State onsite wastewater program; local health departments handle residential septic approvals.

(801) 536-4300

195 North 1950 West, DEQ Third Floor Salt Lake City, Utah

Well permits

Utah Division of Water Rights — Well and Geothermal Programs

Water rights and well drilling questions.

waterrights_wells@utah.gov

Roads & driveways

Utah Department of Transportation — Conditional Access Permit

Conditional access applications for driveways onto state highways.

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Which Utah counties do not require a building permit?

No Utah county is listed as having a blanket residential building-permit exemption: 25 require residential building permits, and 4 have conditional requirements.¹²³ The conditional group comprises San Juan County, Kane County, Wayne County and Juab County; that classification does not establish a permit exemption for your proposed house.³ Utah construction permits come from the local compliance agency; the state division administers codes but does not issue building permits or conduct compliance inspections.¹⁴

Utah's owner-builder exemption concerns contractor licensing, while applicable building-permit, inspection and code requirements remain.¹¹ A qualifying sole owner may build at most 1 residential structure per year and 3 per five years for noncommercial, nonpublic use; paid workers must hold licenses when required.¹¹ Use the Utah owner-builder guide alongside the local building department's project requirements.¹¹

Which Utah counties have no zoning?

Utah has 0 counties listed without county-wide zoning, and all 29 counties have county zoning.¹⁵⁴ The county counts concern unincorporated land; inside municipal boundaries, use the municipality's land-use rules.¹⁶¹⁷ No county is listed with both no residential building-permit requirement and no county-wide zoning.⁸

Utah allows counties to regulate land uses, density, open spaces, structures and buildings in unincorporated areas.¹⁶ Counties must publish their land-use regulations and land-use fee schedules online, so ask the county planning office to identify the parcel's district and the ordinance provisions for your intended home or temporary accommodation.¹⁸ The statewide publication requirement does not identify a parcel's actual zoning district or boundaries.¹⁸

Who issues septic permits in Utah?

For a Utah residential septic proposal, start with the local health department: health districts serve 22 counties and county offices serve 7.⁹ Central Utah Public Health Department and Southwest Utah Public Health Department are among the commonly named septic authorities.⁹ The Utah Division of Water Quality establishes statewide onsite wastewater rules, while local health departments administer those rules and may impose stricter requirements.¹⁹

Utah's onsite program includes septic design and plan review, but the available statewide approval rule does not establish a single permit requirement or fee for every residential septic activity; ask the local health department for the proposed system's approval process and charges.⁵¹⁹ A dwelling must connect to public sewer where available and practicable; otherwise, an adequate onsite or other acceptable wastewater system is required.²⁰ Treat wastewater feasibility as a separate decision from obtaining the building permit.²⁰¹⁴

Can you live in an RV or tiny home on your land in Utah?

Utah RV occupancy answers cover 19 counties: 2 are classified allowed, 4 temporary-only, 11 limited and 2 prohibited; the remaining 10 are unanswered, rather than presumed allowed.⁶ The allowed entries have narrow settings: Carbon County addresses recreational vehicle courts in a Mountain recreation development, while Grand County addresses RV or travel-trailer occupancy within a manufactured housing park.⁶ Those entries do not establish unrestricted RV residence on an ordinary private parcel.⁶ Consult the Utah RV-living guide and ask the parcel's planning office about the intended occupancy.⁶

Utah tiny-home answers cover 10 counties, all classified limited; 19 counties have no confirmed county-level answer.¹⁰ Utah's RV-park sanitation rule covers RV parks, while tiny-home permission outside parks depends on local land-use rules and how the dwelling is classified.²¹⁷ RV-park rules therefore do not supply permission to live on a separate rural lot.²¹

Where are the best Utah counties for a bolthole?

Carbon County and Duchesne County lead the Utah Bolthole Index at 62 out of 100, followed by Rich County at 61.²² Cache County, Sanpete County and Uintah County each score 58; Morgan County scores 55 and Daggett County scores 54.²² All of those leading counties require residential building permits, have county zoning and use health-district septic authorities.²² Their scores support a shortlist for comparing land, rather than an expectation of building without approvals.²²

The median county farmland value is $4,020 per acre; San Juan County has the lowest listed value at $748 per acre.²³ These are county farmland averages, so use them for county comparison rather than pricing an individual building parcel.²³ The median county effective property-tax rate is 0.5%, and the median county property-tax bill is $1,603 annually.¹³

What should you check about Utah water, wells and highway access?

Utah uses prior appropriation for water rights, and 19 counties include special groundwater-management areas.²⁴ Many areas are closed to new appropriation; a new landowner may need to buy an existing right rather than assume a domestic well is exempt.²⁴ For a Utah shallow well, the owner must have a valid groundwater right before construction; approval produces a Start Card, which the licensed driller or shallow-well constructor must obtain and file before work.¹² Ask the Division of Water Rights about the parcel's water-right and well situation before committing to a well-dependent purchase.¹²²⁵

A new driveway or local-street connection to a Utah state highway requires a UDOT conditional access permit, as do changes in land use or access intensity along a state highway.²⁶ Begin with a pre-application meeting with the appropriate UDOT region, then submit the complete application packet online with the documents identified at that meeting.²⁷

Watch-outs

Utah's adopted construction-code version is effective July 2026 and superseded January 2027; confirm the applicable edition with the local building department for a later project.²⁸
Utah's agricultural construction exemption covers structures solely for agricultural use and not human occupancy; plumbing, electrical or mechanical permits may still be required.²⁹
County zoning counts concern unincorporated Utah land; municipal subdivision and land-use requirements need a separate check inside city limits.¹⁶¹⁷
For Utah parcel dimensions, ask the county planning office for the applicable district standards; counties must publish their land-use regulations online.¹⁸

Sources

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Building permits, zoning and rural land rules across Utah