St. Louis
St. Louis
345 Marshall Avenue, Suite 302
Webster Groves, MO 63119
314-421-0042
Excellence in Civil Construction in St. Louis
Since our inception in 1995, Castle Contracting has remained committed to meeting clients’ needs with expertise and innovation. Tackling projects spanning multiple industries and sizes, our project teams and general contractors in St Louis provide valued clients and communities with safe, high-quality sitework and optimal results.
St. Louis, Missouri's Leading Sitework Contractor
When clients want to succeed, they choose Castle's sitework contractors in St. Louis, MO. Why? Our all-in, boots-on-the-ground mentality honors Castle’s values and its partners’ expectations, ensuring that we complete projects on time and on budget.
Clients benefit from consistent, first-rate results from a company they can trust. Our St. Louis construction team members and craft professionals bring reliable, top talent and valuable experience to Castle’s wide range of civil construction services, from earthmoving and excavation to directional boring for underground utilities. Our collaborative approach and commitment to due diligence make us one of the leading site preparation and construction companies in St. Louis, MO.
Where We've Worked
We proudly operate across our Nation’s heartland, completing exceptional projects built to last. Our St. Louis crews have experience supporting a range of large-scale projects from renewable energy sites to utilities for water and wastewater treatment facilities.
Supporting St. Louis Communities
New neighborhoods, schools and healthcare facilities in St. Louis, MO, and beyond: Castle is committed to being America’s leading sitework contractor. We build stronger communities as a trusted civil construction provider. Our teams have always operated with professionalism and respect for each other, our clients and the areas that we serve. That’s something to count on.
St. Louis Construction Projects
Castle in Action: Projects That Shape Our World
Browse our work to learn more about Castle's impact in St. Louis and beyond.
Awards and Recognition
2020 - 2024 Zero Recordable Accidents Safety Award
AGC Missouri
2021 Constructech Vision Gold Award
Commercial/Specialty Contractor: Excavation Work $26-$100 million
Constructech Magazine
2021 Safety Excellence Award
Subcontractor - 2nd Place
NAWIC Midwest Region
2023 Construction Project Safety Award
Bayer East Campus Utility Infrastructure Utility
AGC Missouri2021 SLC3 CII Best Practice Award
Front End Planning: Saint Louis University Utility System Upgrade
St. Louis Council of Construction Consumers2021 - 2022 Construction Project Safety Award
Next NGA West
AGC Missouri2020 AGC of Missouri Keystone Award
2nd Place Mid-America GC/CM/Prime Contractor Building Construction Under $5 Million
The Hill Development
AGC Missouri2020 Construction Project Safety Award
Washington University East End Transformation Project
AGC Missouri2020 SLC3 CII Best Practice Award
Finalist - Front End Planning: The Hill Development
St. Louis Council of Construction Consumers
Achieve Your Career Goals
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