Building Codes and Certificates of Occupancy

Building Codes and Certificates of Occupancy

Non Commercial

For Non Commercial construction, Fremont County has no general zoning or building codes, except the following:

  • In those areas within FEMA designated flood hazard zones around Lander, Riverton, Dubois and Hudson.
  • The Incorporated Cities within the County have specific Zoning and Building Codes.
  • South Pass City has Historic Zoning for building appearance.
  • The Wind River Reservation is Zoned Residential/Agricultural. Reservation Zoning is administered by the Intertribal Business Council (307) 332-6625.
  • Fremont County requires a permit for all small wastewater systems (septic systems) that generate less than 2,000 gallons per day.

The areas regulated by the Fremont County Floodplain Zoning Regulations can be found at our office in Lander, or may be found on the Fremont County Website under Mapserver. A copy of the Floodplain Zoning Regulations is also available online or in our office.

South Pass Zoning Regulations are available in the Fremont County Planning Office.

Fremont County Small Wastewater Regulations can be found on the County website or in our office. Due to significant changes in soil conditions around the County, it is recommended that a pre-permit conference be scheduled with our Small Wastewater Specialist prior to purchase of property in the County, or any development thoughts.



A Plan Review is REQUIRED for all of the following (Wyoming State Statute; 35-9-108):

Buildings intended for public access:

  • New Construction (Govt. owned/leased buildings or, over 5000 sq.ft. in area or, child care centers for more than 10 children or, multi-story buildings or, places of assembly regardless of size.)

  • Additions to Existing Commercial Buildings

  • Alterations and Remodeling of Commercial Buildings with Work Area 400 square feet or Greater

  • Change of Occupancy Type or Use in a Commercial Building

Fire Protection Systems (i.e. Fire Alarm, Fire Sprinkler, Fire Suppression);

  • New Systems

  • Additions to, or Alterations of Existing Systems

Alternative Energy ( Solar, Residential Wind, Generator, Etc.)

Installations of Above Ground Storage Tanks or, Dispensing facilities for Flammable or Combustible Liquids.

Type I Commercial Kitchen Exhaust Hood Installations

Spray Finish Applications

On September 22, 2021 the State of Wyoming adopted the 2021 International Codes. The following codes apply:

  • 2021 International Fire Code,
  • 2021 International Building Code,
  • 2021 International Fuel & Gas Code,
  • 2021 International Mechanical Code,
  • 2021 International Existing Building Code, and
  • The current edition of the National Electrical Code.

All new plan review submissions from, October 1, 2021 and until further notice, must be compliant with the current edition of the ICC 2021 adopted state codes and referenced standards.

For additional information, please contact:

Jeff Schoen
(307) 673-1461

For all construction meeting the above requirements, the State Fire Marshalls Office should be contacted. 

Other Permits

  • The Wyoming DEQ is responsible for all permitting and oversight of any Commercial Wastewater system generating high strength wastewater or residential wastewater greater than 2,000 gal per day and any Water Supply system. For details contact:

James Brough
Northwest District Engineer
Ph: 307-335-6961

  • Any wells that would be proposed to supply water to any facilities, personal or commercial, must be permitted through the State Engineers Office.