Set a ball on your floor. Does it roll? Do doors swing open or shut on their own? Is there a gap under one side of the couch that was not there before? Your foundation is no longer level. Something underneath has moved, and the house is following it. Foundation leveling is the work of bringing it back — lifting the settled areas, stabilizing them, and making the floors feel right again.
How you know your foundation is not level
Uneven floors are the symptom everyone notices first. But leveling problems show up in other ways too: cracks in drywall, especially above doors and windows; gaps between walls and ceilings or floors; countertops and cabinets pulling away from the wall; windows and doors that stick or will not latch; and in brick homes, stair-step cracks in the brickwork outside.
A simple test: place a marble or a small ball in several spots on the main floor and see which way it rolls. Check door frames with a level. Look at where the baseboards meet the floor — gaps that grow and shrink along the wall mean the floor is waving. These are the same warning signs covered in our guide to signs of foundation problems.
Why foundations go unlevel
Foundations go unlevel because the ground under them changes. In our area, the common causes are clay soil shrinking during dry periods and leaving voids under the footing, poorly compacted fill settling under newer homes, water washing soil away from under the foundation, and in some cases footings that were never set on strong soil to begin with.
Slab foundations have their own version: the concrete slab settles into soft spots or voids underneath, leaving the floor sloping or cracked. Crawl space homes go unlevel when the supports underneath weaken or sink. Each type needs a different fix, which is why the inspection matters more than the symptom.
Leveling with piers
For homes with basements or crawl spaces that are settling, the standard fix is steel piers — push piers or helical piers driven deep past the problem soil to stable ground, then used to lift the foundation back toward level. The foundation is lifted slowly, in small steps, while the crew watches how the house responds. Once the settled areas are back up, the weight of the home rests on the piers permanently.
Pier leveling addresses the cause: the foundation is now supported by deep, stable soil instead of the shifting surface soil that let it sink. It is the right fix when the problem is the ground under the footings. After the lift, final elevation readings document exactly how much each section moved back, and those readings become part of your project records. See foundation piering and underpinning for the full explanation of how piers work.
Slab jacking vs piering
Slab jacking — also called mudjacking or foam jacking — is a different technique for a different problem. Holes are drilled through a settled concrete slab, and material is pumped underneath to fill voids and lift the slab back up. Traditional mudjacking uses a cement-based slurry. Modern polyurethane foam injection uses an expanding foam that is lighter, cures faster, and needs smaller holes.
Here is the honest distinction: slab jacking lifts concrete slabs — garage floors, basement slabs, and sometimes slab-on-grade home foundations. It works when the problem is voids or soft spots directly under the slab. It does not work when the problem is deep — when the soil several feet down is the issue, or when a full foundation with footings is settling. In those cases, filling the void under the slab is a temporary fix because the deep soil keeps moving. Piers go deep and solve the deep problem.
For exterior concrete — driveways, sidewalks, patios, pool decks — foam lifting is usually the perfect fix. See concrete lifting for that work specifically.
Leveling a crawl space home
Homes with crawl spaces level differently than homes with basements. Instead of piers on the exterior footings, the work happens underneath: rotted or undersized supports are replaced, sagging beams are jacked back up, and new steel posts on concrete footings carry the load. Where joists have sagged between supports, sistering — fastening a new joist alongside the old one — restores stiffness so the floors feel solid again.
Crawl space leveling almost always pairs with moisture control. Jacking up beams while the crawl space is still wet is pointless, because the new wood will rot like the old wood did. That is why a leveling plan for a crawl space home usually includes a vapor barrier or full encapsulation alongside the structural work. See crawl space repair for how the moisture side is handled.
What "level" really means
An honest word about expectations: the goal is a stable, functional foundation, not laser-perfect floors. Most homes can be lifted back close to their original position. But a house that has settled for years has adjusted — framing has shifted, drywall has cracked, finishes have conformed. Lifting too aggressively can cause new cosmetic damage. A good crew lifts to the point of stability and maximum safe recovery, then stops. We will tell you before work starts what recovery to expect for your home.
Some cosmetic repairs after leveling are normal: drywall cracks that need patching, doors that need re-hanging, caulk lines that need redoing. These are small jobs compared to the structural work, and they mean the house moved back where it belongs.
How long leveling takes
Most residential leveling projects take a few days to about a week, depending on how many piers are needed and how much lifting is required. The work is done from outside the home in most cases. You can stay in the house. There is noise from the hydraulic equipment during the day, and some digging around the foundation that gets backfilled and regraded when the work is done. Our guide to the foundation repair timeline walks through what to expect day by day.
Leveling and your home's value
An unlevel foundation is one of the first things a home inspector flags, and it scares buyers. A documented professional leveling — with photos, measurements, and warranty paperwork — turns that liability into a selling point. If you are thinking about selling in the next few years, read how foundation repair affects home value before you decide when to do the work.
Free leveling inspection
Leveling starts with measurements: where the foundation has dropped, by how much, and what is underneath. Our free inspection maps all of it, explains whether piers, slab lifting, or something simpler is the right fix, and gives you a written quote. Fill out the form below to schedule yours.