Demien Construction

Demien Construction Co. is a distinguished full-service general contractor with a rich heritage and a commitment to building for a better community. With a foundation laid in 1956 by Ralph Demien, the company has been upholding excellence in the construction industry for over half a century. Currently, Larry Juern, his nephew, carries on the original commitment to quality and community development. Our main office is located in Wentzville, Missouri, and we proudly serve the greater St. Louis area and beyond.

Our company is built on professionalism, reliability, and quality workmanship, which has allowed us to establish strong relationships with our clients and partners. At Demien Construction, we believe in building relationships while building facilities, ensuring that each patron's specific needs are met with utmost care. We are honored to be part of the Butler Manufacturing network, the world's largest and most experienced supplier of steel building systems, which further strengthens our ability to deliver superior construction services.

Company History

Demien Construction Co.'s reputation for excellence has been cultivated through two generations of commitment to building for a better community. Our founder, Ralph Demien, started the company in 1956, and Larry Juern, his nephew, continues the legacy of dedication to quality craftsmanship and superior materials. Our extensive experience in the construction industry enables us to provide expert design skills, quality craftsmanship, and top-notch materials for every project.

Community Involvement

At Demien Construction, we are committed to enriching the communities where we work and live. We actively participate in and support various organizations, including:

• Rotary Tri-County
• Builders
• Habitat for Humanity
• YMCA
• Chamber of Commerce (St. Charles County)
• St. Charles County Lutheran High School
• St. Charles County Community College
• 4-H Therapeutic Horsemanship
• United Services
• Noah's Ark Day Care
• Wentzville Rotary

General Contracting

Demien Construction Co. is a full-service contractor capable of providing the right products and services to meet your project needs. Our expertise includes building codes and a wide array of products and services to cater to the unique requirements of your project. We pride ourselves on building relationships as well as facilities, ensuring professionalism, reliability, and quality workmanship in every partnership.

Design Build Services

Demien Construction Co. offers complete turnkey design-build services, creating customized projects and top-quality facilities tailored to your needs. Our design-build approach allows us to manage every aspect of your project, from conception to completion, ensuring a seamless and efficient building experience. We work closely with you to understand your vision and goals, translating them into a reality that reflects your expectations and enhances the community.

Pre-Engineered Buildings

Demien Construction Co. specializes in modern systems construction, resulting in simpler, faster, and better projects upon completion. Our expertise in pre-engineered buildings enables us to facilitate large interior modules and extra-long bay sizes, providing you with functional and efficient spaces that meet your needs.

Pre-Project Planning

At Demien Construction, we understand the importance of proper planning in ensuring the success of your project. Our pre-project planning services include assistance in becoming a subcontractor or supplier, as well as access to our online plan room for viewing recent listings. We are dedicated to helping you navigate the pre-project phase with ease and confidence.