Building permits, zoning and land rules 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 plumbing¹. For projects outside that list, call the Building Department at 435-644-4985¹⁰. Kane County has adopted the 2021 building, residential, plumbing, mechanical and fire codes and the 2020 electrical code¹⁰. 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 apply¹¹. Kane County's agricultural density exemption excludes qualifying structures from density calculations; it does not waive all zoning, building or septic requirements¹².

The Kane County Building Department is at 76 North Main Street, Kanab, UT 84741, and its permit-question phone number is 435-644-4985¹⁰. Building applications are online because the county no longer accepts paper applications, and applicants use their online account to request inspections or check permit status¹⁰. Applications that fail the listed Utah statutory submission requirements will be rejected¹³. 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 scope¹⁴. 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 work¹⁰.

Kane County zoning applies to unincorporated land; Big Water sets its own zoning inside town limits^2,3. Septic approval in Big Water stays with Southwest Utah Public Health Department⁴. Verify current parcel zoning with the Recorder's Office or Land Use Authority¹⁵.

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 setbacks¹⁶. Kane County accepts no new R-½ lots; that zone remains for administration of existing lots¹⁶. RURAL 10 and RURAL 40 require 10-acre and 40-acre lots respectively, with 30-foot setbacks on every side¹⁷. MR requires at least 1 acre, a 30-foot front setback, 20-foot side and rear setbacks, and building coverage no greater than 30%^18,19.

Internal accessory dwelling units are permitted within primary homes in county residential zones, subject to building, health, septic and zoning requirements⁸. Land-use application fees include $400 for a zone change and $1,000 for a subdivision including a PUD, plus County Engineer review costs²⁰.

Southwest Utah Public Health Department handles onsite wastewater permitting for Kane County and reviews plans, issues permits, conducts inspections and keeps septic records⁴. Call the Kane County Environmental Health contact at (435) 296-5477 ext. 3226⁴. 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 installation⁴. The department must inspect a new or modified system before backfilling, and project information must remain on site²¹. 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 budget⁹. An approved onsite system can serve off-grid land where public sewer is not used, but alternative sanitation technologies are not automatically authorized⁴.

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 code⁵. 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 requirements⁵. 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 permit⁵. Kane County treats a tiny home on a trailer as an RV⁶. 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 license²². Permanent-foundation tiny-home occupancy remains unconfirmed; ask the Land Use Authority how the parcel's zone treats it¹³.

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 permit^2,13.
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 approval¹².
3. Confirm legal access; a new connection or changed access intensity along a state highway requires a UDOT conditional access permit²³.
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 permit^4,24.
5. Submit the building application online because paper applications are not accepted¹⁰.
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 limit⁷. Use licensed contractors or labor allowed by the certification; the licensing exemption does not waive building permits or inspections⁷.
7. Request building inspections through the permit account, and keep a new or modified septic system uncovered until the health department inspects it^10,21.

Kane County can withhold building permits from improperly divided land; covered subdivisions also need required improvements installed and accepted by the County Engineer^2,25. 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 right^9,24.

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 PUD¹². Qualifying agricultural structures are excluded from density calculations¹². 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 conditions¹².

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 change²⁶. PUD front-setback wording is inconsistent; ask the Land Use Authority to resolve it before drawing a site plan^13,26. County-road driveway and floodplain-development requirements remain unconfirmed; ask the Building Department who reviews them¹⁰.