Building permits, zoning and land rules in Kane County, Utah

At a glance

Building permit

Required for specified projects; ask the Building Department if your project is not listed¹

Zoning

County land-use rules apply in unincorporated Kane County²

Septic permits

Southwest Utah Public Health Department⁴⁵

RV living

Limited in residential zones, with seasonal rules and temporary-use permits⁶

Tiny home on a trailer

Treated as an RV under county rules⁷

Owner-builder

Conditional licensing exemption available; file the county form⁸

Internal ADU

Permitted within a primary dwelling in county residential zones⁹

Septic soil suitability

9.5% of soils avoid severe conventional drain-field limits¹⁰

Who to call

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Do you need a building permit in Kane County, Utah?

Kane County expressly requires building permits for water-heater replacement, meter-base installation, solar-panel installation, electrical-panel replacement, furnace installation or replacement, and a non-habitable accessory structure of 200 square feet with a primary residence when it has no electrical or plumbing¹¹. For projects outside that list, call the Building Department at 435-644-4985¹². Kane County has adopted the 2021 building, residential, plumbing, mechanical and fire codes and the 2020 electrical code¹³. A structure used solely for agriculture and not for human occupancy may qualify for a state construction-code exemption, although plumbing, electrical or mechanical work may still require building permits and tract-specific exceptions apply¹⁴. Kane County's agricultural density exemption excludes qualifying structures from density calculations; it does not waive all zoning, building or septic requirements¹⁵.

Who is the Kane County building department, and how do you reach it?

The Kane County Building Department is at 76 North Main Street, Kanab, UT 84741, and its permit-question phone number is 435-644-4985¹². Building applications are online because the county no longer accepts paper applications, and applicants use their online account to request inspections or check permit status¹². Applications that fail the listed Utah statutory submission requirements will be rejected¹⁶. For work subject to Utah's construction code, the agency with jurisdiction is responsible for inspections and code enforcement; after requesting an inspection, an applicant may use an approved third-party inspection firm for the originally requested scope¹⁷. We could not confirm a complete Kane County building-permit fee schedule or project-by-project inspection sequence; ask the Building Department for both before starting work¹².

Does Kane County have zoning in unincorporated areas?

Kane County zoning applies to unincorporated land; Big Water sets its own zoning inside town limits²³. Septic approval in Big Water stays with Southwest Utah Public Health Department¹⁸. Verify current parcel zoning with the Recorder's Office or Land Use Authority¹⁹.

Minimum lots are 1 acre in R-1, 2 acres in R-2 and 5 acres in R-5; all have 30-foot front and 10-foot side and rear setbacks²⁰²¹. Kane County accepts no new R-½ lots; that zone remains for administration of existing lots²⁰. RURAL 10 and RURAL 40 require 10-acre and 40-acre lots respectively, with 30-foot setbacks on every side²²²³. MR requires at least 1 acre, a 30-foot front setback, 20-foot side and rear setbacks, and building coverage no greater than 30%²⁴²⁵²⁶.

Internal accessory dwelling units are permitted within primary homes in county residential zones, subject to building, health, septic and zoning requirements⁹. Land-use application fees include $400 for a zone change and $1,000 for a subdivision including a PUD, plus County Engineer review costs²⁷.

How do septic permits work in Kane County?

Southwest Utah Public Health Department handles onsite wastewater permitting for Kane County and reviews plans, issues permits, conducts inspections and keeps septic records⁵²⁸. Call the Kane County Environmental Health contact at (435) 296-5477 ext. 3226²⁸. A permit and approved design are required before installing, replacing or modifying a septic system, and soil and percolation testing must be completed by a Utah-certified onsite professional before design or installation²⁹. The department must inspect a new or modified system before backfilling, and project information must remain on site³⁰. Only 9.5% of Kane County soils avoid severe limitations for a conventional drain field, so establish feasibility before fixing a house location or purchase budget¹⁰. An approved onsite system can serve off-grid land where public sewer is not used, but alternative sanitation technologies are not automatically authorized³¹.

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

Occupied RVs in unincorporated Kane County residential zones are generally limited to an RV park, manufactured or mobile-home park, designated camping area, or an exception allowed by the county code⁶. Seasonal use allows no more than 2 RVs for no more than 6 consecutive months in a calendar year, without rent, subject to setbacks, culinary water, approved septic, electrical safety, licensing and storage requirements⁶. A temporary-use permit can authorize longer occupancy or more RVs under stated conditions, and living in an RV while building requires the building permit before the temporary-use permit⁶. Kane County treats a tiny home on a trailer as an RV⁷. In R-1/2, R-1, R-2 and R-5 zones, one short-term rental is permitted per lot or parcel, but it needs state registration, tax IDs and a county business license³². Permanent-foundation tiny-home occupancy remains unconfirmed; ask the Land Use Authority how the parcel's zone treats it³³.

How do you build a home in Kane County, step by step?

1. Confirm that the parcel is unincorporated, verify its zoning and legal parcel status with the Kane County Land Use Authority, and resolve any improper division before expecting a building permit²³³.
2. If dividing agricultural land, plan around a 10-acre lot, with a narrow allowance down to 9.5 acres for specified survey conditions and with county approval³⁴.
3. Confirm legal access; a new connection or changed access intensity along a state highway requires a UDOT conditional access permit³⁵.
4. Secure water and septic approval before design: a private well needs a valid water right and Start Card, while septic needs certified testing and an approved permit³⁶²⁹.
5. Submit the building application online because paper applications are not accepted¹².
6. File the Owner/Builder Certification for personal, non-commercial use; new residential construction requires sole ownership, the only residential structure built that year and compliance with the certification’s prior-construction limit⁸. Use licensed contractors or labor allowed by the certification; the licensing exemption does not waive building permits or inspections³⁷.
7. Request building inspections through the permit account, and keep a new or modified septic system uncovered until the health department inspects it¹²³⁰.

What should you check before buying land in Kane County?

Kane County can withhold building permits from improperly divided land; covered subdivisions also need required improvements installed and accepted by the County Engineer²³⁸. Test septic feasibility and confirm water rights before committing to a site: only 9.5% of county soils avoid severe conventional drain-field limitations, and a private well needs a valid water right¹⁰³⁶.

Agricultural-zone parcels of 160 acres or smaller allow at most 2 single-family dwellings and 7 non-exempt structures, with non-exempt coverage capped at 40%; additional density needs a zone change or PUD³⁹⁴⁰. Qualifying agricultural structures are excluded from density calculations⁴¹. Agricultural and Rural-zone animal or fowl enclosures must be at least 50 feet from an adjacent lot's dwelling; reduced accessory setbacks carry placement and corner-lot conditions⁴².

Residential single-lot PUDs cap building coverage at 50% of net acreage and height at 35 feet unless a taller building is approved through the zone change⁴³⁴⁴. PUD front-setback wording is inconsistent; ask the Land Use Authority to resolve it before drawing a site plan⁴⁵³³. County-road driveway and floodplain-development requirements remain unconfirmed; ask the Building Department who reviews them¹².

Watch-outs

• Kane County's published project list is not comprehensive; call the Building Department at 435-644-4985 if your project is not expressly listed¹¹².
• A tiny home on a trailer is regulated as an RV, while permanent-foundation tiny-home occupancy and a countywide minimum dwelling size remain unconfirmed; ask the Land Use Authority before buying⁷³³.
• A building permit may be withheld for a structure on improperly divided land until the parcel complies with current land-use and subdivision ordinances².
• Kane County's residential PUD ordinance gives conflicting front-setback figures; confirm the required setback with the Land Use Authority before designing⁴⁵³³.

Sources

1. Building Department | Kane County, UT, quoted and re-checked
2. Planning Commission | Kane County, UT, quoted and re-checked
3. Town of Big Water: Big Water Municipal and Zoning Codes (Kane County), quoted and re-checked
4. Southwest Utah Public Health Department - Septic Systems (2026 county census)
5. Septic Systems - Southwest Utah Public Health Department, quoted and re-checked
6. 9-6E-3: Occupied Recreational Vehicles, quoted and re-checked
7. codelibrary.amlegal.com, quoted and re-checked
8. Owner/Builder Certification Agreement to Comply with the Construction Trades Licensing Act, quoted and re-checked
9. 9-1-7: Definitions, quoted and re-checked
10. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
11. Building Department, quoted and re-checked
12. Kane County Building Department (kane.utah.gov)
13. Building Department, quoted and re-checked
14. Utah Code § 15A-1-204 (Utah statewide rule), quoted and re-checked
15. codelibrary.amlegal.com, quoted and re-checked
16. Building Department, quoted and re-checked
17. Utah Construction and Fire Codes Act, quoted and re-checked
18. Town of Big Water: Septic Systems - Southwest Utah Public Health Department (Kane County), quoted and re-checked
19. Grand Staircase-Escalante Zoning Map, quoted and re-checked
20. 9-6A-2: Area and Setback Regulations, quoted and re-checked
21. 9-6A-2: Area and Setback Regulations, quoted and re-checked
22. Land Use Authority | Kane County, UT, quoted and re-checked
23. Land Use Authority | Kane County, UT, quoted and re-checked
24. 9-6B-3: Area and Setback Regulations, quoted and re-checked
25. 9-6B-3: Area and Setback Regulations, quoted and re-checked
26. codelibrary.amlegal.com, quoted and re-checked
27. Fee Schedule for Land Use Applications, quoted and re-checked
28. Southwest Utah Public Health Department Environmental Health (swuhealth.gov)
29. Septic Systems - Southwest Utah Public Health Department, quoted and re-checked
30. Septic Systems - Southwest Utah Public Health Department, quoted and re-checked
31. Septic Systems - Southwest Utah Public Health Department, quoted and re-checked
32. Short Term Rentals | Kane County, UT, quoted and re-checked
33. Kane County Land Use Authority (kane.utah.gov)
34. codelibrary.amlegal.com, quoted and re-checked
35. Conditional Access Permit (Utah statewide rule), quoted and re-checked
36. Water Well Drilling Information, quoted and re-checked
37. Owner/Builder Certification, quoted and re-checked
38. Kane County Land Use Ordinance Chapter 21: Subdivisions, quoted and re-checked
39. codelibrary.amlegal.com, quoted and re-checked
40. codelibrary.amlegal.com, quoted and re-checked
41. codelibrary.amlegal.com, quoted and re-checked
42. codelibrary.amlegal.com, quoted and re-checked
43. 9-20-8: Residential - Single Lot Development Standards, quoted and re-checked
44. 9-20-8: Residential - Single Lot Development Standards, quoted and re-checked
45. Land Use Authority | Kane County, UT, quoted and re-checked

Written October 11, 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.