Do You Need a Permit for a Pole Barn in Michigan?

By the RBF Construction team · Published October 23, 2026

Short answer: In Michigan, a detached accessory building over 200 square feet — which includes almost every pole barn or garage — needs a building permit from the local building department. A building used for agriculture on the land it sits on, and not for retail sales, can be exempt from the building permit under state law. Either way, the township’s zoning rules for size, height and setbacks still apply.

When a Pole Barn Needs a Building Permit

The Michigan Residential Code exempts one-story detached accessory structures with a floor area of 200 square feet or less from the building permit. Anything larger — a typical pole barn, detached garage or workshop — needs a permit and inspections. Permits are issued by the city, township or village where the property is located, or by the county where it runs the building department for that community.

The Agricultural (Farm Building) Exemption

Michigan’s Single State Construction Code Act says a building permit is not required for a building incidental to the agricultural use of the land it sits on, as long as it is not used for retail trade. Townships usually ask the owner to sign an agricultural exemption affidavit stating that the building will store farm equipment or products, will not be lived in, and will not be used for retail sales.

• The exemption applies to the building permit, not to zoning. Most townships still require a zoning or land-use permit.
• If the building later changes use — for example, to a shop, a home business or living space — the exemption can be lost and the building must meet code.
• Townships apply the exemption differently. Some require that the stored products be grown on the same property.

Zoning Rules That Still Apply

Township zoning ordinances commonly regulate accessory buildings by:

• maximum size, often tied to lot size
• maximum height
• setbacks from property lines, the road and the house
• whether the building can sit in front of the house
• exterior materials in some subdivisions

Private deed restrictions or homeowner association rules can be stricter than zoning, so check those too.

Other Approvals to Check

• Soil erosion permit: Michigan generally requires a soil erosion and sedimentation control permit for earth changes that disturb one acre or more, or that are within 500 feet of a lake or stream. In Genesee County, the Drain Commissioner’s office administers the program for most communities.
• MISS DIG 811: state law requires notice to MISS DIG at least three business days before digging post holes or footings, so underground utilities can be marked.
• Driveway access: a new driveway to a county road needs a permit from the county road commission.
• Electrical: wiring a pole barn usually needs a separate electrical permit and inspection.

Steps Before You Build

1. Call your township building or zoning office and ask about accessory building limits and permits.
2. If the barn is for farm use, ask for the agricultural exemption form.
3. Have the building location, size and height planned to fit the setbacks.
4. Submit plans for the building permit, if one is required.
5. Call MISS DIG 811 before any digging starts.

RBF Construction builds pole barns and garages across Genesee, Lapeer, Livingston and Oakland counties, and handles the site prep and permits. Request a pole barn estimate.

Sources

• Michigan Residential Code, R 408.30505: work exempt from permit
• Michigan Farm Bureau: building permit exemption for farm buildings
• Michigan EGLE: soil erosion and sedimentation control overview
• MISS DIG 811: frequently asked questions