Barndominiums are widely accepted across most counties.
Wyoming building codes are adopted at the local level. Cheyenne, Casper, and other cities adopt the IBC/IRC. Many rural areas have minimal enforcement.
Primary Code
IBC / IRC (locally adopted)
Code Version
Varies by jurisdiction (2015–2018 IBC)
Adoption Level
Local Only
Statewide Enforcement
No
Rural areas have streamlined or minimal permitting. Cities require standard permits.
Residential
Required
Commercial
Required
Agricultural
Not Required
Size threshold: structures under 200 sq ft may be exempt.
Agricultural buildings on ranch and farm land are generally exempt from permits in most Wyoming jurisdictions.
Small structures typically exempt.
Extreme wind exposure in many areas (Wyoming is one of the windiest states). Heavy snow loads in mountains. Moderate seismic risk near Yellowstone.
Wind Load
110–140 mph
high zone
Snow Load
25–150+ psf
Seismic
A–C
Category
Flood
FEMA Regulated
Energy Code
IECC (locally adopted)
Version
Varies
No statewide energy code mandate.
License Type
No state license required
Wyoming does not require a state contractor license.
Front
25–30 ft
Side
5–10 ft
Rear
15–20 ft
Set by local zoning where applicable.
Frost depth 36-48 inches. Rocky soils in mountains. Wind engineering critical for foundations.
Very popular. Wind engineering critical.
No permits needed in most rural areas. Steel barns common for ranch use.
Excellent state for barndominiums. Very few restrictions. Wind load engineering is the primary consideration.
Minimal requirements in rural areas.
Full IBC compliance in cities.
HOAs very uncommon. Most Wyoming land is unrestricted.
Flood zones along major rivers and mountain drainages.
Key counties with specific permit information for Wyoming.
Full code enforcement within Cheyenne.
Typical fees: $300 – $2,000
Standard enforcement.
Typical fees: $250 – $1,500
Tourist area. Standard enforcement. High snow loads.
Typical fees: $200 – $1,500
Rural. Practical enforcement.
Typical fees: $150 – $1,000
Ag Exemption AvailableRural northeast WY. Minimal enforcement.
Typical fees: $0 – $500
Ag Exemption AvailableVerify the information above directly from these official sources. Regulations change — always confirm with your local building department before starting construction.
Disclaimer: This guide is for informational purposes only and does not constitute legal or professional advice. Building codes, permit requirements, and zoning regulations change frequently. Always verify current requirements with your local building department, planning office, or a licensed professional before starting construction. Homestead Steel Structures & Design is not a legal authority on building codes or zoning regulations. Last updated February 2026.
