The short answer
Leveling is the lift itself: raising the parts of the house that dropped so floors, doors and walls line up better. On a pier and beam house it’s mostly shims; on a slab it needs piers to lift against. HomeGuide puts shim leveling at $1,000–$3,500, and This Old House says pier-based lifting and leveling can reach $23,000.
Whether it’s worth it depends less on the house being out of level, which most houses are a little, than on whether the movement is doing damage and getting worse.
Worth it, or not yet?
Leveling usually makes sense when
- doors and windows won’t open, close or latch, and adjusting them hasn’t held;
- cracks in brick or drywall keep widening between dated photos;
- you can feel the slope walking across a room;
- a buyer’s inspector or lender has flagged the foundation; or
- plumbing or gas lines are being strained by the movement.
Hold off, or fix something else first, when
- the movement is small and has stayed put across a year of photos;
- the floor was simply built out of level and nothing is cracking, which the Foundation Performance Association lists among problems wrongly blamed on foundations;
- the middle of the house is rising from wet soil, where the cause is water and piers will not prevent foundation uplift unless they are designed to do so; or
- the crawl space is wet, since new shims on soggy ground won’t stay put.
Call to schedule an inspection
How “out of level” is measured
Engineers look at two numbers from an elevation survey. Tilt is how much the whole floor slopes from one side to the other; the Texas ASCE guidelines say a tilt greater than 1% is usually noticeable. Deflection is how much the floor bows over a span; the benchmark is L/360.
Example: across a house 40 feet deep, a tilt of 1 percent means one side sits about 5 inches lower than the other.
These are guidelines, not pass-or-fail lines: ASCE says its document offers guidelines, not standards, and its authors expect an engineer to weigh the numbers against what’s cracking in the house.
Leveling a slab and a pier and beam house
| Compared | Slab | Pier and beam |
|---|---|---|
| What lifts the house | Hydraulic jacks set on new piers along the low beams | Jacks under the beams, from inside the crawl space |
| What holds it | The piers, capped and shimmed at the new height | New or replaced shims on the existing or added piers |
| How much disruption | Digging along the outside; slab openings for interior piers | Mostly hidden in the crawl space |
| Typical extra work | Patching openings, a plumbing test | Replacing rotted wood, adding supports |
The slab page and the pier and beam page cover each repair in detail.
Call to schedule an inspection
What leveling can’t do
- Make the floor perfect. The Texas ASCE guidelines are direct about it: perfection is not attainable by remedial measures. A lift that tries to force the last fraction out of a floor risks cracking the house.
- Undo every crack. Lifting a house that settled over years often opens new hairline cracks and closes others. Cosmetic repairs usually come after.
- Protect pipes on its own. ASCE says water supply and drain lines should be tested for leaks when a repair includes lifting. Ask whether the plan includes a test and who runs it.
- Stop the soil from moving. The clay keeps responding to wet and dry spells. Drainage and steady moisture after the lift decide how long the floor stays where it was put.
Other kinds of lifting
You’ll also see slabjacking (mudjacking) and polyurethane foam lifting, which raise concrete by pumping material underneath it. They’re mostly used on driveways, sidewalks and patios. Published prices:
| Method | Published cost | Source |
|---|---|---|
| Slabjacking (mudjacking), per job | $500–$1,300 | HomeAdvisor |
| Mudjacking, by area | $4–$9 per sq ft | HomeGuide |
| Polyurethane foam lifting, by area | $5–$25 per sq ft | Angi |
If a plan proposes either one to level a house rather than a driveway, ask why it was chosen over piers.
Call to schedule an inspection
After the house is level
Ask for after-lift elevation readings and keep them with the plan. The FPA recommends a second survey six to twelve months later to confirm whether the foundation is still moving. Between now and then, keep gutters draining away from the house and keep the soil’s moisture even through dry spells; the drainage page explains how.
Fort Worth’s rule is that all residential foundation repairs need a building permit with plans from a licensed engineer, and a lift on new piers is foundation repair by any reading. Don’t assume a shim-only re-level is exempt without asking. The permit guide has the details.