Oklahoma

Oklahoma Permit Guide for Metal Carports, Garages and Barns

Your Oklahoma carport permit comes from your city or town, or in some places the county planning office for land outside town limits, because the state sets one minimum building code through the Oklahoma Uniform Building Code Commission (OUBCC) but does not issue permits for a carport or garage. Out in the country, many counties run no building permit program at all, so the answer depends on exactly where your lot sits. Call the local office with your address before you order.

Building code in effect

As of September 14, 2026, Oklahoma's statewide minimum residential code is the 2024 International Residential Code with Oklahoma amendments (OAC 748:20, Subchapter 6), replacing the 2018 IRC that had been in effect since 2022. The OUBCC adopted the 2024 IBC on the same date for commercial buildings. Under 59 O.S. 1000.23 these codes are the minimum for all entities in the state, and cities may enforce stricter rules. The state rule leaves the wind speed and ground snow load cells of IRC Table R301.2(1) blank for each local jurisdiction to fill in.

Who issues permits

Building permits come from the city or town where the building goes. Outside city limits, a handful of counties have planning departments that issue permits (Oklahoma County, for example, says it issues building permits for the unincorporated area only). In counties without a program, there may be no building permit at all, though floodplain rules can still apply. Zoning is a separate question, and a county or city zoning office may need to sign off on setbacks even when no building permit is needed.

County permit guides

County guides are coming soon.

Don't see your county? Call 919-725-8176 and we'll help you find the right office.

When you need a permit

Small sheds: The Oklahoma version of the 2024 IRC does not change section R105.2, so the model exemption for one-story detached accessory buildings of 200 square feet or less stays in place. Your city can still require a zoning or setback check.
Carports: The IRC has no carport exemption. Inside a city or town, expect a permit for an anchored carport, and expect the city to check setbacks from property lines.
Garages and shops: A detached metal garage over 200 square feet needs a building permit wherever a city, town or county runs a permit program. Electrical work for lights or outlets is permitted and inspected separately.
Rural land: In unincorporated areas, it depends on the county. Some counties issue permits under their own regulations; others have none. Ask the county clerk or planning office which applies to your parcel.

Farm buildings

Oklahoma's state building code rules do not list a general farm building exemption. The county zoning statutes do: under 19 O.S. 868.11, county zoning rules do not apply to "the erection or use of the usual farm buildings for agricultural purposes," and the county planning statutes (19 O.S. 863.13 and 865.61) use similar language. That protects true farm buildings from county zoning, but cities and towns follow their own ordinances. If you plan to use the building for anything besides farming, the exemption may not fit, so get it in writing from the county.

Wind and snow

Oklahoma sits in the heart of tornado alley, and strong straight-line winds and hail are common across the state. The Oklahoma code even adds an appendix with residential tornado provisions that cities can choose to adopt. Snow loads are modest in most of the state but higher out in the Panhandle. Because the state leaves the wind and snow design numbers blank for local jurisdictions to fill in, ask your city or county for the design wind speed and ground snow load at your address. Our partnered manufacturers offer certified buildings rated for 140 MPH wind and 35 PSF snow load, and higher ratings can be quoted where required.

Before you order

Find out if your lot is inside city limits or in unincorporated county land, since that decides who issues the permit.
If you are in the county, ask whether the county has a planning department that issues building permits for your area.
Ask your local office for the design wind speed and ground snow load. Oklahoma leaves these for each jurisdiction to set.
If you claim the farm building exemption, bring proof the building is for agricultural use and ask the county to confirm it.

Common questions

Do I need a permit for a carport in Oklahoma?
Inside a city or town, usually yes, since the IRC has no carport exemption and the city will want to check setbacks. In unincorporated areas it depends on whether your county runs a building permit program.

Do I need a permit for a metal garage in Oklahoma?
In cities, towns and counties with a permit program, yes, for anything over the 200 square foot shed limit. Rural counties without a program may not require a building permit, but zoning and floodplain rules can still apply.

Are farm buildings exempt?
Oklahoma's county zoning laws (19 O.S. 868.11) exempt the usual farm buildings used for agriculture from county zoning. Cities set their own rules, so check with your city if you are inside town limits.

Sources

Permit rules change. Always confirm with your local permit office before you build.

Looking at buildings? See our metal carports, metal garages and metal buildings.

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