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About Us

About Cornerstone

For Cornerstone CEO Ron Carnwath, general contracting is a family tradition. Ron learned everything there is to know about the business from his father and grandfather in the 1990s. He learned enough that in 2001, Ron felt convicted to hang a shingle of his own. He founded Cornerstone with an original focus on residential remodeling and general contracting. Sensing a larger opportunity, he switched the company’s focus to commercial construction in 2004. The rest, as they say, is history.


More than 15 years later, Cornerstone has emerged as one of the most trusted facilities maintenance companies in the Midwest, Northeast, and Atlantic Regions. We’ve assembled a proven team of builders and craftsmen with decades of experience. We are licensed and insured as a full-service construction company.


Founded in Rochester, MI, Cornerstone has since expanded its footprint to other states throughout the Midwest, Northeast, and Atlantic regions. Our growth is a credit to our work and customer service. Customers know they can count on us to operate with the same level of care and diligence as we would if we were working on our own businesses.


You’ve worked hard to grow your business. We’ll work hard to maintain it.

Brian Wood

Director of Operations

Brian has been in involved in residential and commercial construction for over 15 years. As a licensed contractor he has worked with, led and directed crews on numerous projects. His leadership is geared toward systems, quality and execution. This has been instrumental for making sure Cornerstone always delivers beyond its customers expectations. 

Ron Carnwath

Owner & President

Ron started Cornerstone in 2001 and has served as president ever since. With over 25 years of experience in construction and general contracting, Ron has seen it all and is the perfect person to lead your next project.


While we’re known for our work with restaurant chains such as Chick-fil-A, we also serve retailers, commercial-grade facilities, and more. Whether you have one location or multiple, we’d love to work with you.

SERVICING THE MIDWEST, Northeast, and Atlantic regions

Headquartered in Southeast Michigan, Cornerstone works with businesses across the rust belt. We're expanding our footprint across the country and will travel anywhere for the right job!


“Cornerstone is the best! They responded to my maintenance emergency immediately and saved my company from losing millions with their quick repairs!”


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