Full Service Commercial General Contractor in St Louis, MO
Your Trusted Partner in Construction Excellence
Demien Construction stands as a pillar of reliability and expertise in the commercial general contracting and building industry. With close to 70 years of experience, this family-owned business has been delivering exceptional construction services since 1956. We serve a wide range of clients, ensuring every project is completed on time and to the highest quality standards. Our team handles all building and construction needs, taking the stress off of you and allowing you to focus on your vision.
Our commitment to excellence is evident in every project we undertake. Demien Construction ensures meticulous attention to detail and superior craftsmanship in all commercial buildings. Our seasoned professionals bring a wealth of knowledge and experience to each project, ensuring that your construction needs are met with precision and care. We pride ourselves on our integrity and dedication to client satisfaction, making us a trusted partner. Give us a call or text today and experience the ease of working with a top commercial general contractor in St Charles, MO.
Comprehensive Pre-Project Planning for Seamless Execution
At Demien Construction, we understand that successful projects begin with meticulous planning. Our Pre-Project Planning services are designed to lay a solid foundation for your construction endeavors. We collaborate closely with clients to define project goals, establish realistic timelines, and develop detailed budgets. By identifying potential challenges early, we implement value engineering strategies to optimize resources and ensure cost-effectiveness. Our experienced team provides critical path timelines, highlighting key milestones and dependencies, to keep your project on track from inception to completion. This proactive approach minimizes risks, reduces delays, and delivers a high-quality facility that meets your specific needs. With over 50 years of experience, Demien Construction is committed to turning your vision into a successful reality through expert planning and execution. Contact us today to speak with an experienced commercial general contractor in St Charles, MO.
Trusted Partner in Pre-Engineered Building Solutions
As the top commercial general contractor in St Louis, MO, Demien Construction is proud to be a partner with Butler Manufacturing™, the largest network of construction professionals in the world. This collaboration allows us to offer state-of-the-art pre-engineered building systems that combine efficiency, flexibility, and durability. Whether you're planning a manufacturing plant, warehouse, auto dealership, or aviation hangar, our pre-engineered buildings provide a streamlined construction process with reduced lead times and cost savings. Our team customizes each project using Butler's advanced engineering software to meet your exact specifications, ensuring optimal performance and aesthetic appeal. With decades of experience in systems construction, Demien Construction delivers buildings that stand the test of time, backed by the reliability and innovation of Butler Manufacturing.

Commercial General Contractor in St Louis, MO
At Demien Construction, we offer a full range of construction services tailored to meet the unique needs of each client. Whether you are planning a commercial or industrial project, our team is equipped to handle every aspect of the construction process. From initial design and planning to final execution, we ensure that each phase is managed with the utmost professionalism and attention to detail. Our goal is to deliver high-quality results that exceed your expectations, on time and within budget.

Careers
Demien Construction is always on the lookout for talented professionals to join our team. We believe that our employees are our greatest asset, and we are committed to providing a supportive and rewarding work environment. If you are passionate about construction and looking for an opportunity to grow your career with the top commercial general contractor in St Louis, MO, we encourage you to explore our current job openings. Join us and become part of a team that values excellence, teamwork, and continuous improvement.

About Us
Founded in 1956, Demien Construction has built a legacy of excellence in the construction industry and is known as a top commercial general contractor in St Louis, MO. Our family-owned business is rooted in the values of integrity, quality, and customer satisfaction. We have proudly served the Saint Louis, MO area for nearly 70 years, developing strong relationships with our clients and the community. Our experienced team is dedicated to delivering outstanding results on every project, ensuring that your construction experience is positive and rewarding.
Are You Looking for a Commercial General Contractor in St Charles, MO? Here’s Why You Should Choose Demien Construction:
Founded in 1956
Highest Quality Standards
Timely Completion of Every Project
Family Owned
Careers Available
Licensed, Bonded, and Insured
If you’re searching for a reliable and experienced commercial general contractor in St Charles, MO, look no further than Demien Construction.

Founded in 1956, our family-owned business has spent decades building a reputation for excellence in the construction industry. With nearly 70 years of experience, Demien Construction consistently upholds the highest quality standards in every project we undertake, ensuring that clients receive exceptional results tailored to their specific needs. One of the hallmarks of our service is the timely completion of all projects, a testament to our dedication to professionalism and customer satisfaction. This efficiency does not come at the expense of quality; rather, it is supported by our status as a licensed, bonded, and insured company, giving clients peace of mind from start to finish. In addition to delivering outstanding construction services, Demien Construction is also committed to fostering a strong team culture and regularly offers career opportunities for individuals looking to grow in a supportive, reputable company. Choosing Demien Construction means partnering with a trusted commercial general contractor in St Louis, MO who values integrity, craftsmanship, and community relationships.
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