Before you order steel
Do I need a permit for a metal building in Texas?
It depends on where the building sits more than on what it is. Inside city limits, almost always yes. Out in an unincorporated part of a county, often no building permit at all for a private shop or home, but other county permits still apply. On the coast, there's a windstorm inspection on top. This is a general guide, not legal advice: call the city or county before you pour.
The short version
- Inside city limits
- Expect a building permit, plan review and inspections. Cities adopt their own building codes, and a shop-sized metal building is far past the small-shed size that model codes let go without a permit. Many cities also ask for sealed engineered drawings for the steel, and some apply their code in their extraterritorial jurisdiction (ETJ) too, so check whether the lot is in one.
- Unincorporated county, private shop or house
- Texas counties have limited power to regulate building. Many issue no building permit for a private home or shop at all. Bexar County, for example, says it generally doesn't regulate private homes and issues a residential permit only when an owner asks for one, such as for a lender. State law also says that in the counties where it applies a residential building code, the county can't require approval before construction starts.
- Unincorporated county, commercial use
- Different story. A building open to the public or used for a business can need a county permit, often through the fire marshal. Bexar County requires one for new commercial buildings, with plans and fees.
- On the Texas coast
- The 14 first-tier coastal counties (Aransas, Brazoria, Calhoun, Cameron, Chambers, Galveston, Jefferson, Kenedy, Kleberg, Matagorda, Nueces, Refugio, San Patricio and Willacy) plus part of Harris County make up the area where Texas Windstorm Insurance Association coverage needs a windstorm certificate (a WPI-8). New structures are inspected to the windstorm code as they're built. If you'll want TWIA coverage, plan for it before the steel is ordered: doors and windows have to be rated for it too.
What the county can still ask for, permit or not
Even where there's no building permit, these usually still apply in an unincorporated area:
Floodplain
- Building in a mapped flood zone usually needs a floodplain development permit and an elevation for the slab
Septic and driveways
- A barndominium with plumbing needs an on-site sewage (septic) permit where there's no sewer
- A new driveway onto a county road often needs a culvert or entrance permit
Platting and addressing
- Unplatted land may need county sign-off before anything is permitted
- A new home needs a 911 address
Who else can say no
- Deed restrictions and HOAs
- Many rural subdivisions limit metal buildings, set minimum square footage for homes, or require masonry on the front. These are private rules, so the county won't check them, but they're enforceable.
- Your lender and your insurer
- A bank financing a barndominium will often want sealed drawings and a certificate of occupancy even where the county doesn't issue one. That's why some counties issue permits on request.
- The engineer
- Whatever the permit situation, the frame should be designed for your site's wind and snow loads. A takeoff, including Gable Takeoff's, sizes members from span charts for budgeting; it isn't an engineered design.
Questions to ask before you order steel
- Is the lot inside city limits or a city's ETJ?
- Does the county issue building permits for this use (private, ag, commercial)?
- Is any of the lot in a mapped flood zone?
- Does it need a septic, driveway or plat approval?
- Are there deed restrictions or an HOA?
- Is it in a windstorm (TWIA) county, and do you want that coverage?
- Will a lender or insurer want sealed drawings or a certificate of occupancy?
Sources
- Texas Local Government Code § 233.153, building code standards in unincorporated areas
- Bexar County Fire Marshal: building permits in unincorporated Bexar County
- TWIA: the designated catastrophe area
- TWIA: windstorm certification
- Texas Department of Insurance: windstorm inspections FAQ
Rules change and vary county by county. This page is general information, checked in October 2026, not legal advice. Confirm with the city or county where you're building.
Price the building once you know what's allowed.
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