A metal building is engineered with either a certified or non-certified rating, and the difference isn’t visible on the surface — it comes down to whether the structure has actually been verified against your specific site’s wind, snow, and seismic requirements by a licensed engineer, or built to a generic standard instead.
The Core Difference
| Factor | Certified | Non-Certified |
|---|---|---|
| Engineering process | Reviewed and stamped by a licensed professional engineer | May not be reviewed by an engineer at all |
| Code compliance | Meets all required codes for your specific area | May not meet local building codes |
| Steel gauge | Typically 12-gauge structural steel framing | May use lighter, less durable steel |
| Weather rating | Designed for your specific climate and conditions | Not designed with your specific weather in mind |
| Cost | Higher | Lower |
Why Non-Certified Can Be Risky
A non-certified building costs less, but it presents real risk in areas prone to severe weather, since it wasn’t engineered with your specific climate in mind. Some jurisdictions won’t even permit a non-certified structure at all — worth confirming with your local building department before considering one purely on price.
Insurance Considerations
Insurance providers often ask for engineering documentation when underwriting a policy on a metal building, and a certified structure with stamped drawings is generally easier to insure than one without them. In the event of a claim — storm damage, structural failure, or otherwise — having certified engineering on file can also simplify the claims process, since the insurer has clear documentation of what the building was actually designed to withstand rather than having to make assumptions after the fact.
What Certification Means for Your Permit
Most building departments require stamped engineering drawings before they’ll issue a permit for a structure of any real size, and a certified building’s drawings are prepared specifically to satisfy that requirement — signed by a licensed Professional Engineer, verified against your address’s actual code requirements. A non-certified building may still get built, but without that documentation, getting it approved can mean delays, additional engineering fees added after the fact, or in some jurisdictions, an outright rejection of the permit application.
Does Building Type Change the Calculation?
Certification matters most where the stakes of a structural failure are highest — a commercial warehouse holding inventory and employees, an agricultural building housing livestock, or any structure in a region with genuine snow, wind, or seismic exposure. For a small, low-risk storage structure in a mild climate, the gap between certified and non-certified may matter less in practice, though local code requirements often apply regardless of how the building is used. The safest approach is to check your specific jurisdiction’s requirements before assuming a smaller or lower-stakes project doesn’t need certification.
Is the Extra Cost Worth It?
Whether you need a certified building depends on your local codes, the structure’s purpose, and your own risk tolerance. For anything beyond the most minimal, non-critical use, the peace of mind of knowing your building is engineer-approved and up to code is generally worth the added cost — and in areas with real snow, wind, or seismic exposure, it’s less an upgrade than a genuine safety consideration.
What This Looks Like in Practice
A certified building’s engineering doesn’t stop at a generic calculation — it’s reviewed against your project’s specific address, so the wind and snow load numbers used in the drawings match the actual conditions your structure will face, not a regional average. That distinction matters most in exactly the situations where a building’s performance is tested hardest: a heavy snow year, a severe wind event, or a seismic zone with real activity.
Permits, Codes & Engineering
Certified buildings are engineered against the ASCE 7 standard from the American Society of Civil Engineers, referenced by the International Code Council‘s International Building Code, or in Canada, the National Building Code of Canada. Toro’s buildings are certified and engineered in-house — not by a third-party engineer most competitors outsource to — for your specific address before they ship, and every certified building carries a real warranty behind it: a 1-year material and workmanship warranty plus a 40-year paint warranty on straight-wall buildings, or a 50-year rust-perforation warranty on arch-style buildings.
Related Building Types
PEMB: The Complete Guide | Commercial Buildings | Agricultural Buildings
Get a Certified Metal Building
Toro Steel Buildings provides certified drawings on every project, engineered to meet or exceed your local codes. Request a free quote to get started.