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Unerstall Foundations & Flatwork Inc

Serving the Greater St. Louis Metro Area since 1996

When it comes to building a strong foundation for your home or business, trust Unerstall Foundations & Flatwork Inc to protect your property and lay the groundwork for your safety and peace of mind.

Based in Union, MO, and Franklin County, our family-owned foundation repair company has served the Greater St. Louis metro area since 1996. From new home foundations and flatwork to concrete equipment rentals, foundation repairs, and sump pump installation, we have the equipment and expertise to kick off a seamless and successful construction project.

Let Unerstall Foundations put your ideas in concrete! Get in touch with us today to schedule a free estimate with a concrete contractor.

Worksite rainbow with Unerstall Foundations & Flatwork team

Dependable, top-notch concrete contractors

Restoring and establishing the structural integrity of your property shouldn’t come with a high price tag.

That’s why at Unerstall Foundations & Flatwork Inc, providing quality service at an affordable price is at the forefront of everything we do. Our team is ready to deliver concrete solutions for all your construction needs by offering a diverse range of services.

Need to rent concrete equipment or concrete forms?

Unerstall Foundations & Flatwork Inc is the leading supplier of concrete forms and concrete equipment rentals in the Greater St. Louis, MO area. With an expansive inventory of concrete forms, boom trucks, conveyor trucks, and more, we have the rental equipment you need to make your next job easier.

Counties we serve in Missouri

Franklin • Crawford • Gasconade • Warren • St. Louis • St. Charles • Jefferson

Not sure if we service your area?

Missouri county service areas map

About Us

After working in the construction industry for 45 years, Albert Unerstall recognized a growing need for concrete and foundation repair services in Franklin County and the surrounding areas.

In 1996, he founded Unerstall Foundations and Flatwork Inc. Our family-owned concrete contracting company continues to provide reliable, top-notch concrete solutions to residential and commercial clients throughout the Greater St. Louis metro area. In 2001, Albert’s wife, Cindy, started U-rent, Inc. as the demand for renting concrete forms and equipment increased for the do-it-yourselfer.

No matter how large or challenging the project may be, we’re the team you can trust to deliver results of the highest quality on-time, within budget, and with your satisfaction and peace of mind.

“They did a wonderful job on our sidewalk! They showed up when they promised, did it in one day, and cleaned up after themselves! We could not be happier with the whole experience! Super nice people and first rate work!”

Virginia B.

“The contractors completed the job quickly and efficiently. They presented a better option to re-install the concrete sidewalk. Yet they allowed us to make that final decision of what we thought would look best for the property. In the end we were all happy with the outcome and the completing the job quickly.”

Shannon T.

“The team over here works great together and produces a fantastic product. Albert is great with communication and does what he says he’s going to do. Overall great company! They’ve done two new apartment complexes for me and 6 more to go!”

Jacob C.

Get started on your project. Schedule a free estimate today!

Unerstall Foundations & Flatwork Inc


1673 Old Hwy 50 W
Union, MO 63084


Monday ‒ Friday
7:00 AM ‒ 5:00 PM