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Keystone Construction Company

Keystone Construction Company was founded by Bill Hardie and John Hardie in 1987 with a simple goal: to simplify the design and construction process while delivering better buildings for their clients.

 

From the beginning, Keystone has specialized in design-build commercial construction, bringing planning, design, budgeting, and construction together under one team. This integrated approach allows projects to move efficiently from concept to completion while maintaining cost certainty and exceptional quality.

 

Bill Hardie’s background in architecture, civil engineering, and construction, combined with John Hardie’s experience in nationwide commercial construction and real estate development, established the foundation for Keystone’s proven process.

 

Keystone’s design-build system was later recognized by Harvard University’s Graduate School of Design as a case study on “How to Do Design-Build Right.”

 

In 2025, Keystone was acquired by Otter & Company to strengthen its capabilities and expand market opportunities. Today, Bill Hardie and Mike Kaiman continue to provide leadership, guiding the company’s next phase of growth.

 

Today, Keystone focuses on industrial construction, sports and entertainment facilities, multi-family developments, and complex special projects, delivering efficient, high-quality buildings for clients throughout the region.

How We Give Back

Testimonials

"Just a quick note of thanks for the great work Keystone did on The Factory. It turned out much better than I imagined. We enjoyed working with you. Really appreciate your group’s hard work. Please pass along my sentiments to everyone involved. Thank you. Looking forward to working together again."
Michael Staenberg
Michael Staenberg President TSG Properties
"The collaboration on this project alongside Keystone has been a delight. Their stewardship of the process, of our ideas, and of our products brought about a genuine expression of who we are as a company. It is so rewarding to see the heart of our People First culture expressed in this building that will soon be our corporate home."
Tom Manenti
Tom ManentiChairman and CEO of MiTek
"Keystone Construction's Newco manufacturing building project served as an archetype for design-build projects of this relative size and was documented in a case study used in my course to teach the next generation...how to design-build right."
Steven W. Dunsford
Steven W. DunsfordInstructor Harvard University, Graduate School of Design
"When we decided to expand, Keystone's was the first name that came to mind," said Jim Jones, President of Midwest Motorcycle. "They exceeded our expectations on the last project and we know they will do it again on the addition."
Jim Jones
Jim JonesPresident of Midwest Motorcycle

Awards and Articles

Mia Rose Principals Form Holding Company; Acquire West County GC

Keystone Construction Company founded by Bill Hardie and John Hardie in 1987. Keystone has been serving the community for 35 years offering proven and creative designs and build systems that provide customers with the best final product for less. Harvard University chose their unique process as a course study on “How to Design and Build Right”. Keystone continues to exceed the expectations of the community while playing a vital role in our region’s growth.

Progress 64 West - 2022 Excellence in Community Development Award

Keystone Construction Company founded by Bill Hardie and John Hardie in 1987. Keystone has been serving the community for 35 years offering proven and creative designs and build systems that provide customers with the best final product for less. Harvard University chose their unique process as a course study on “How to Design and Build Right”. Keystone continues to exceed the expectations of the community while playing a vital role in our region’s growth.

St. Louis Concrete Council’s 2021 Quality Concrete Award

Keystone Construction Company received the award for work at The Factory entertainment venue in Chesterfield, Missouri. 52,000 sq ft, tilt-up building. The construction used more than 50,000 sq ft of interior slabs and more than 40,000 sq ft of concrete tilt-up wall panels. In total, 6,346 cubic yards of concrete and more than 300,000 lbs. of rebar were used.

Building St. Louis Awards 2021: $80M project breathes new life into former Shriners Hospital site

Keystone Construction Company worked with Desco Group’s to construct a mixed-use building at Plaza Frontenac development. Read about the award above.

St. Louis Business Journal - 2016 Fastest Growing Companies Award

Keystone Construction Company placed third by growing nearly 500% from 2013 to 2015. This growth was mostly due to the addition of project types to our portfolio, which includes: industrial, office, retail and healthcare.

Progress 64 West - 2016 Excellence in Community Development Award

Keystone Construction Company was honored by Progress 64 West at their annual banquet themed “Spirit of Progress – Connecting the Region to the Future”. Progress 64 West is a civic organization established to promote the responsible growth of commerce in the St. Louis region.

Excellence in Design Award from American Buildings Company and Nucor - 2016

Awarded to Structural Systems II, Inc. for FireStream WorldWide, Inc. office/warehouse building. Each project awarded showcases new designs that illustrate innovative metal system construction.

American Council of Engineering Companies of Missouri - 2005

Engineering Excellence Competition, Honor Award Geotechnology Inc., for Long Road Crossing, Kehr Development

 

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