Unincorporated Johnson County

No county-level building permit is required for construction in the unincorporated area of Johnson County. However, floodplain development permits are required for construction in FEMA-mapped SFHA areas, small wastewater (septic) permits are required for new or modified on-site sewage systems, and subdivision review is required before platting or dividing land. State-level WSFM commercial code requirements apply to qualifying commercial/public buildings.

Note: No county building permit requirement means typical IRC/IBC exemptions do not apply. Only subdivision, floodplain, and septic permits may be required depending on project scope.

Building code

None. Johnson County has not adopted a building code for unincorporated areas.

Owner-builder

Not applicable -- no county building permit requirement

Contractor requirements

Not applicable at the county level. Wyoming has no statewide general contractor license requirement. If hiring contractors, verify their state electrical license (if doing electrical work) and any applicable Buffalo or Kaycee contractor licensing if the project site is within those jurisdictions.

1. 01
   Contact the Planning Department at (307) 684-1907 to discuss your project scope and applicable requirements
2. 02
   Determine whether subdivision review, floodplain development permit, or septic system permit is required
3. 03
   For subdivisions: Review Johnson County Subdivision Regulations (Resolution #715), submit application with required documents, Planning Commission reviews, Board of County Commissioners approves/denies
4. 04
   For floodplain development: Determine if property is in a FEMA-mapped SFHA using FEMA Flood Map Service Center (msc.fema.gov), submit Floodplain Development Permit application if in SFHA
5. 05
   For septic systems: Confirm current Small Wastewater Treatment Facility Regulations, submit application and pay applicable fees
6. 06
   Obtain permit before beginning work

Source: Johnson County Planning Department ↗

• Contact Planning Department at (307) 684-1907 (phone)

Typical sequence: No county building inspections for construction in unincorporated areas (no building permit requirement). Floodplain inspections may be required to verify NFIP compliance. Septic/small wastewater inspections are handled by the Planning Department. State Fire Marshal conducts inspections for commercial/qualifying projects where WSFM holds enforcement authority.

Source: Johnson County Planning Department ↗