Building

Ainsworth-Benning Construction is built on a foundation of craftsmanship, integrity, and a deep understanding of what it takes to deliver exceptional results across a wide range of industries. Whether it’s educational institutions, healthcare environments, commercial offices, or high-end residential builds, our team brings more than 65 years of experience to every jobsite. Our consistent, award-winning performance stems from a hands-on approach and a deep commitment to client satisfaction — delivering projects that are not only on time and on budget, but also exceed expectations in quality and function.

With headquarters in Spearfish, South Dakota, and a project footprint stretching throughout the Black Hills and into Wyoming, Ainsworth-Benning has established itself as a trusted partner in both public and private sectors. Specializing in the Construction Manager at Risk (CMAR) delivery method, we bring value early in the project lifecycle, offering solutions that optimize both time and resources. From small-scale renovations to complex multi-million dollar builds, our record of safety, craftsmanship, and award-winning execution continues to define us as leaders in the region’s construction industry.