Planning foundation or waterproofing work? Find contractors by state, county or city. Our guides cover general planning; check the directory for current local coverage.
Short answer
For a slab foundation, ask for a floor elevation survey and a clear explanation of the cause before choosing a repair. Plumbing leaks, drainage and soil moisture can all move a slab. Compare proposals that state the method (piers, slab lifting or both), where the work happens, what happens inside the house and what the warranty covers.
Measure before you repair
An elevation survey maps high and low points across the slab and makes later comparisons possible. Ask each contractor for the readings, not just a conclusion. If plumbing runs under the slab, ask whether a leak test is recommended before repair, since a leak can keep the soil moving after the foundation work is done.
Know what the work will disturb
Interior piers or tunnelling may mean lifting flooring or working inside the house; exterior piers mean digging along the perimeter. Ask where the work will happen, how long rooms will be out of use and who restores floors, landscaping and concrete.
Compare the outcome being promised
Ask whether the proposal aims to stabilize the slab, lift it, or both, and what tolerance the contractor commits to. Get the warranty in writing and check whether it covers the whole slab or only the repaired section.
What a slab foundation repair quote should include
- Elevation survey readings
- Plumbing leak testing recommendation
- Repair method and locations
- Interior and exterior disruption and restoration
- Permits and engineering
- Warranty coverage and transferability
Find slab foundation repair contractors near you
Browse the location directory by state, county or city. Each listing shows its license record and the dated source showing the business offers the service. Check the license in the state lookup before hiring, and ask for examples of comparable work.
Ready to describe the problem? Request quotes for slab foundation repair.
Find the right contractor for the problem
What to ask, and what the written quote should include, for each type of work.
- Piering and underpinningWhat to compare before you hire
- Bowing wall repairWhat to compare before you hire
- Crawl space repairWhat to compare before you hire
- Basement drainage and waterproofingWhat to compare before you hire
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Frequently asked questions
Should I fix plumbing leaks before slab repair?
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Ask the contractor and, if needed, a licensed plumber. A leak under the slab can keep changing soil moisture, so many homeowners test plumbing before or alongside foundation work.
Sources
- [1]Federal Trade Commission, Consumer Advice, Hiring a Contractor (added October 16, 2026; not yet re-checked)
Any prices are ranges published by the sources above, not quotes. Your price depends on the diagnosis, access, soil, permits and local labor rates. Compare written quotes for the same scope.