The short answer
Published consumer guides put polyurethane foam lifting across a wide per-square-foot range. Real quotes depend on how much material is required beneath the slab, not just the visible surface area.
Slab size and number of panels
Depth and volume of voids
Amount of lift required
Access for equipment and hoses
Contractor minimum charge
Crack/joint repair or sealing add-ons
Common questions
What is a realistic foam leveling budget?
Consumer references often cite roughly $5–$25 per square foot nationally for foam, but Los Angeles projects should be estimated from actual site conditions.
Why is there such a wide price range?
Two slabs with the same surface area can require very different foam volumes if one has deeper voids or needs greater lift.
Use this information to compare quotes
Ask each contractor what material will be injected, how the original cause of settlement will be addressed, what is included in patching and cleanup, and what conditions are excluded from any warranty.