St. Louis housing stock spans a century and a half, and a foundation question usually depends on which era you own. Below: what to expect from a stone basement, a poured wall, or a slab, and how to tell settlement from ordinary settling.
For every price on one page, read the foundation repair cost in St. Louis guide: what each job class runs, what moves an estimate, and what a written quote should show.
How do I know if I have a problem?
Doors that stick in one season and swing free in another, a crack that keeps reappearing after it is filled, floors that feel out of level near one wall. These are the things people notice first, and they are worth understanding before they are worth worrying about.
How do I know if my foundation problem is urgent?
Horizontal wall cracks, bowing you can sight along a wall, doors newly racking through a season, or any crack widening month over month. Those get eyes soon. Hairline vertical cracks that hold steady are watch-list items. When in doubt, the evaluation settles it with numbers; many local specialists don't charge for it, so ask when they call.
What causes most foundation damage in St. Louis?
The shrink-swell cycle. Metro clay expands against basement walls in wet seasons and contracts away from footings in dry ones, so houses here are slowly squeezed and dropped in alternation. River-valley alluvium and south-county karst add their own chapters, and freeze-thaw winters compound all of it.
What will repairs cost me?
Crack injections from about $400; wall restraint $2,500-$10,000; interior drainage $2,500-$8,000; piering $1,200-$3,000 per pier with most underpinning jobs $4,000-$15,000. Missouri's overall structural-repair band runs $3,800-$12,500. The cost guide breaks down every factor.
What happens if I go ahead?
What actually happens once you say yes: timings, paperwork, and what carries over if you sell.
Is there coverage on both sides of the river?
Yes. The Missouri-side metro from Florissant to Oakville plus St. Charles County. Each community page describes its ground; the evaluation reads your specific lot.
Are foundation repairs warrantied?
Structural systems often carry written warranties. Ask whether they transfer and get the terms in the scope before you sign, because a warranty you learn about afterward isn't one.
Can I sell a house with a repaired foundation?
More easily than one with an unexplained crack. Metro inspectors and buyers know these soils; documented, warrantied repair reads as a solved problem. Ask for the paperwork trail that makes it read that way.
Is commercial work covered?
This site focuses on residential and light-commercial work. Larger structural work belongs with a commercial structural firm.
How soon can someone come out?
A local specialist calls you back to set a time. How soon depends on their schedule. If something is actively moving, say so when you call. Call or send the form.
Still holding a question?
Send it over or go straight to the evaluation and get answers measured off your own walls.
Get a St. Louis foundation evaluation
Tell us what the house is doing (cracks, bowing, sticking doors, sloping floors) so the evaluation starts from what you have seen. A specialist who serves the St. Louis area will call you back.