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Commercial Metal Builders in Iowa & Illinois

Post-frame commercial and public sector buildings are one of the fastest-growing facets of our business. The demand for office spaces, storefronts, event centers, and other commercial spaces is tremendous. As the leading metal post frame builders in Iowa and Illinois, Greiner Buildings provides the professional advice, guidance, design, and quality construction necessary for your commercial building.

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Commercial Pole Barn Buildings

Commercial steel buildings are a cost-effective alternative to traditional stud frame buildings. They are built quickly without compromising quality. Our structures are built using the best materials on the market, which guarantees long-term durability and reduced overall maintenance costs.

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Custom Metal Buildings in Iowa and Illinois

Pole structures eliminate the need for interior support columns. The absence of interior columns maximizes the amount of usable space. This feature is beneficial for commercial buildings because it allows extreme flexibility in floor plan design, and caters to a wide range of layout preferences. To better plan for and visualize your commercial pole building before starting construction, our team of full-service commercial metal building contractors create robust 3D video designs of your build. We specialize in intriguing custom designs and trustworthy workmanship. Get started on your commercial metal building project with a 3D visual that shows you what’s possible.


  • Throughout the decision process, Jeff stayed in contact with us but was never pushy. He always stressed ‘what can I do to help you through the process!’ Simply put, Jeff sold this project. Thanks for a great addition to our property!

    -Tom B., Davenport, IA

  • Competitive price and helpfulness of Greiner representative Jeff. Project manager was also very willing to help or ask any questions.

    -Darrin C., Harper, Iowa

  • Their price was very fair and the local staff’s professional attitude was great and all-in-all they did a great job.

    -John B., Toulon, IL

  • You wouldn’t believe the amount of compliments I’ve gotten about the building. I will recommend Greiner to others and use you guys for future projects.

    -Bryton K., Geneseo, IL

  • We chose Greiner Buildings because of their professionalism during the bidding process, and pre and post-construction.

    -Chris G., Washington, IA

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Accreditations / Awards

Time and time again, we’ve been nationally recognized for our custom post-frame buildings. Working for us ensures you gain valuable construction experience from the best in the business. We’re highly accredited for our work in the industry, and our employee safety program earned a Platinum Award—the highest recognition in the post-frame industry.