Greiner Buildings, Inc.

Greiner Buildings is a post-frame construction company with over 35 years in business, founded in the 1980s, serving Iowa and Illinois from its Washington, Iowa headquarters and a Kewanee, Illinois location. The company builds across agricultural, commercial, and residential categories: machine sheds, cattle and horse barns, event buildings, aircraft hangars, storage units, hobby shops, garages, and municipal buildings. For barndominium buyers, the relevant offering is the SHOME, Greiner's trademarked shop-home hybrid that combines living quarters with workshop space in one post-frame structure.

The company runs a seamless in-house process with a single point of contact per client, covering design, structural engineering, custom construction plans, material delivery, project coordination, and subcontractor management. Custom plans are developed by an internal team rather than pulled from stock kits. Greiner also offers lined and insulated shops, pre-engineered metal buildings, building interiors, and a Building Recover service for re-cladding older structures.

Financing is referenced on the website, though terms are not published. The site highlights award-winning structures and a Signature Series of showcase projects. For buyers in western Illinois or eastern Iowa who want one firm managing a shop-home project from drawings through completion, Greiner is an established regional option with a long post-frame track record.