Do I Need a Permit to Build a Shed in Idaho?
Quick Answer
Under 200 sq ft and under 10 feet tall? Usually no. Bigger? Yes.
Idaho-specific rules
Adopted code: 2020 Idaho Residential Code (based on the 2018 IRC with Idaho amendments) — the statewide baseline under the Idaho Building Code Act, effective January 1, 2021. Detached accessory structures like sheds can fall under the adopted code's general permit-exemption provisions for small structures, but Idaho's statewide amendments do not restate a specific square-footage threshold for an accessory-structure exemption — confirm the exemption threshold with your local building department before building.
The 200 Sq Ft Rule
Most cities exempt sheds under 200 square feet and under 10 feet in height from building permits. This applies to simple storage sheds, garden sheds, and similar structures without plumbing or electrical. Even exempt sheds must comply with setback requirements.
Setbacks Still Apply
Even without a permit, your shed must meet zoning setbacks — typically 5 feet from side and rear property lines. Sheds cannot be placed in utility easements. Corner lots have additional restrictions. Check your city's zoning code before choosing a location.
When You Definitely Need a Permit
A permit is required for: sheds over 200 sq ft, sheds over 10 feet tall, any shed with electrical wiring, any shed with plumbing, and detached garages or carports regardless of size. Prefab and kit sheds over 200 sq ft still need permits — the rule is based on size, not construction method.
HOA Restrictions
Many HOAs have additional shed restrictions: approved materials and colors, maximum size smaller than city code allows, and sometimes outright prohibition of certain shed types. Get HOA approval before purchasing or building.
Bottom Line
Small sheds (under 200 sq ft, under 10 ft tall, no utilities) are usually permit-free. Everything else needs one. Always check setbacks.
Permit fees by city in Idaho
Verified from each city’s published fee schedule. Where a city has no separate fee listed for this project, open the city page for the current requirements and amount.