Barndominiums are widely accepted across most counties.
Iowa does not have a mandatory statewide building code for most construction. The Iowa State Building Code applies to public buildings and factory-built structures. Local jurisdictions adopt their own codes.
Primary Code
IBC / IRC (locally adopted)
Code Version
Varies by jurisdiction
Adoption Level
Local Only
Statewide Enforcement
No
Many rural counties have very streamlined processes. Some unincorporated areas have no building department.
Residential
Required
Commercial
Required
Agricultural
Not Required
Size threshold: structures under 200 sq ft may be exempt.
Agricultural buildings on farm property are generally exempt from building permits in most Iowa jurisdictions.
Small structures typically exempt.
Tornado risk is significant. Moderate to heavy snow loads. Wind loads increase on the open plains.
Wind Load
105–120 mph
moderate zone
Snow Load
20–40 psf
Seismic
A–B
Category
Flood
FEMA Regulated
Energy Code
IECC (locally adopted)
Version
Varies
No statewide energy code mandate for most construction.
License Type
No state license required
Iowa does not require a state general contractor license. Some cities require local registration.
Front
25–35 ft
Side
5–15 ft
Rear
15–25 ft
Setbacks set by local zoning where it exists.
Frost depth of 42-48 inches. Basements are very common.
Very common. Minimal permitting in rural areas.
Agricultural exemptions widely available.
Increasingly popular in rural Iowa. Good acceptance.
Minimal requirements in rural areas.
Full code compliance in cities with adopted codes.
HOAs uncommon outside Des Moines suburbs. Rural land is generally unrestricted.
Significant flood zones along the Mississippi, Missouri, Des Moines, and Cedar rivers.
Verify 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.
