You're not just building space-you're building what's next.

That’s why the way it’s built-and who builds it-matters.

At Greiner, we don’t just show up with tools. We show up with purpose, pride, and a process that puts you first.

Matt Greiner
Chief Executive Officer

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Why Choose Greiner?

Post-Frame Experts

With 35+ years of experience, we deliver award-winning craftsmanship in agricultural, commercial, and residential buildings.

Seamless In-House Process

From design to construction, we manage every step, ensuring efficiency and less stress for clients.

Custom-Built Solutions

Our post-frame buildings are designed to be highly customizable, allowing clients to tailor every detail to their exact specifications. Whether you need a durable machine shed, a spacious livestock barn, or a unique Shome® that combines a shop and home, we create structures that perfectly suit your needs and lifestyle.

Trusted Experts for Over 35 Years

Leaders in Post-Frame Buildings

We’ve been providing clients with award-winning post-frame structures for over 35 years. Whether your construction needs are residential, commercial, or agricultural, our expert craftsmen bring your vision to life using the highest quality materials in the industry.

Our building capabilities are extensive. Post-frame buildings are highly customizable, and we can create a construction plan tailored to your exact specifications.

Versatile Post-Frame Buildings for Every Need

We design and build custom agricultural, commercial, and residential pole barns with expert craftsmanship and quality materials. Whether you need an office, workshop, tool shed, or business space, we bring your vision to life.

The Greiner Difference

Complete Post-Frame Building Services

We’ve spent decades living, breathing, and innovating post-frame buildings. Our streamlined processes and years of experience set us apart from competing operations. Unlike other pole barn builders, we simplify our communications through a single-point-of-contact. Our entire building process happens in-house, from structural design and material delivery to project coordination and subcontractor management. Even our highly customizable post-frame construction plans are made by members of our team.

What Our Clients Say

Exceptional Service and Support from Start to Finish!

Our Story

Leaders in Pole Barn Construction

We founded Greiner Buildings on humble Midwest roots and values. Since the 1980s, we’ve been establishing new standards of excellence within the post frame construction industry. Other post frame builders can’t match our levels of expertise, professionalism, and innovation.

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Expert tips to prevent mice damage and protect your investment. Owning a pole barn in Iowa or Illinois…

Custom Post-Frame Buildings
in Iowa and Illinois

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