Foundation repair has no honest cost per square foot. Contractors price a repair by the number of piers it needs, not by the size of your house. In Houston, a pressed concrete pier runs about $300 to $600 and a steel pier $1,000 or more, so the same 2,000 square foot home can cost under $1 or over $10 per square foot to fix, depending on how much of it has moved. This page sits under our guide to foundation repair in Houston. It shows how pier prices translate into a per-foot figure, which jobs really are priced by area, and how to rough out your own number before a visit.
Is foundation repair priced per square foot?
No. Almost no foundation contractor prices a slab or pier and beam repair by the square foot of the house. The price is built from the number of piers, the pier type, whether any go inside, and access around the house. A national cost guide makes the same point: the size of the area that has moved matters far more than the footprint of the home. A per-foot figure can only be worked out after the quote.
Per-foot thinking comes from new construction, where it makes sense. A new concrete slab is poured across the whole footprint, so a national guide prices it at about $4 to $8 per square foot. A repair is the opposite. It targets the part of the foundation that is moving and leaves the rest alone.
That is why online calculators that ask only for your square footage tend to give wide, unhelpful ranges. They can't see which corner dropped. For the full list of method prices, see foundation repair prices in Houston.
Why does house size say so little about the repair price?
Because the damage rarely covers the whole house. Most Houston repairs fix one corner, one side or one section where the clay soil has dried and shrunk, or where water has softened it. A large home with one settled corner may need a handful of piers. A smaller home sinking along a full wall can need three times as many, and cost more.
The ground explains the pattern. Lake Charles clay, common across the Houston area, is 45 to 60% clay according to USDA soil scientists. In dry months it cracks open half an inch to 2 inches wide and a foot or more deep, then swells again when water returns. That movement is uneven. The side of the house next to a big tree, a leaking downspout or a low spot in the yard moves first, and that side is what gets piered.
What does a pier repair work out to per square foot?
Divide the pier total by the floor area and you get a per-foot figure, but it swings widely. Using Houston pier prices of $300 to $600 for pressed concrete and $1,000 or more for steel, a small repair on a big house can work out to under $1 per square foot, while a whole-side steel pier job on a small house can pass $12 per square foot.
Here are four made-up examples. The pier counts are illustrations only, and the totals cover piers alone, before inspection, permits or interior work.
| Example home | Piers | Pier total | Works out to |
|---|---|---|---|
| 1,500 sq ft slab, one corner settled | 6 concrete | $1,800 to $3,600 | $1.20 to $2.40 per sq ft |
| 2,500 sq ft slab, one corner settled | 6 concrete | $1,800 to $3,600 | $0.72 to $1.44 per sq ft |
| 1,500 sq ft slab, one full side settling | 18 concrete | $5,400 to $10,800 | $3.60 to $7.20 per sq ft |
| 1,500 sq ft slab, one full side settling | 18 steel | $18,000 and up | $12 and up per sq ft |
Notice the bigger house is cheaper per foot in the second row, for the same work. The per-foot number follows the repair, not the house. The foundation pier cost page compares each pier type in more detail.
Which foundation jobs really are priced by the square foot?
A few jobs are priced by area because the work covers a surface rather than points along the foundation. Mudjacking a sunken slab, foam leveling, crawl space encapsulation and pouring new concrete are the main ones. National guides put mudjacking at about $3 to $8 per square foot and basic encapsulation at about $3 to $7. These are guides, not quotes.
| Job | Typical price by area | What it does |
|---|---|---|
| Mudjacking a sunken slab | $3 to $8 per sq ft | Pumps grout under concrete to raise it |
| Polyurethane foam leveling | About $25 per sq ft on average | Lifts concrete with expanding foam |
| Crawl space encapsulation, basic | $3 to $7 per sq ft | Seals the crawl space against moisture |
| Encapsulation, heavy moisture | Up to $10 per sq ft | Same, with more water to manage |
| New concrete slab | $4 to $8 per sq ft | New construction, not repair |
Mudjacking mostly lifts driveways, patios, walks and garage floors. It does not stop a house slab that is still sinking, because it rests on the same soil that moved. Mudjacking cost covers those jobs, and pier and beam foundation repair cost covers encapsulation on raised homes.
How can you estimate your repair cost before anyone visits?
You can get a rough range by finding where the house has moved and how far that stretch runs, then pricing piers along it. Check doors, floors and walls for signs, walk the outside of the slab, and note the length of the affected side. That gives a ballpark only. The real pier count needs a professional, and the City of Houston requires a building permit for foundation repair.
- Mark the symptoms. Note sticking doors, sloping floors, cracks above door frames and gaps at window corners, room by room.
- Walk the outside. Look for cracks in brick or the slab edge, and for the corner or side where the symptoms cluster.
- Measure the stretch. Pace off the length of foundation along that side or corner. A short corner means fewer piers than a whole wall.
- Check the water. Look for downspouts emptying against the slab, low spots that hold rain and big trees close to the house. These often explain the movement and cost little to fix.
- Price a range. Multiply a guess at the pier count by $300 to $600 for concrete, or $1,000 or more for steel.
- Stop there. Lifting a slab, cutting through floors or placing piers is structural work for a foundation contractor, under a permit. Leave the count and the layout to them.
Add the costs around the piers too. The Houston Press guide puts a local inspection at about $300 to $1,000, says interior piers add about 15%, and says hard access adds 6 to 8% to pier costs. In Bellaire, residential foundation work needs a $130 floodplain development permit. A foundation inspection is how the real count is found.
What should a written quote show instead of a square-foot rate?
A good quote lists every pier: how many, what type, where each one goes, and whether any are inside. It should also say how the repair will stabilize the house, whether lifting is included, who pulls the permit, and what any warranty covers. Those lines let you compare two quotes fairly, which a single square-foot rate never can.
If a contractor does quote you a flat rate per square foot, ask how it was worked out. A price tied to floor area, not to the movement, may include piers the house does not need, or too few where it does.
When you send a request through this site, we'll arrange a visit from a local foundation contractor. They check the house, measure the floors, and work out the repair method and pier count from what they find. The price comes to you in writing before any work starts, and you decide from there.
Questions people ask
How much does foundation repair cost for a 1,500 square foot house?
It depends on how much of the house has moved, not on the 1,500 square feet. Most Houston repairs land between $3,300 and $6,800, according to the Houston Press guide. A small house with one settled corner can sit below that, and one sinking along a full side, especially with steel piers, can cost well above it. The pier count found at the visit decides it.
Are online foundation repair cost calculators accurate?
They give a rough national range, not your price. A calculator that asks for square footage can't see which part of the slab dropped, how deep firm soil sits under your lot, or whether piers must go inside. Use one to sense the scale of the bill. Use a written quote from a contractor who has seen the house to plan your budget.
Is a bigger house always more expensive to repair?
No. A bigger house costs more only when more of its foundation needs support. A large home with one sunken corner can need fewer piers than a small home sinking along a whole wall. Big houses do tend to have more perimeter, so when the whole foundation moves, the repair grows with the size.
Do I need a permit for foundation repair in Houston?
Yes, inside the City of Houston. Foundation repair runs under a building permit, and the city's weekly permit reports list these jobs, including shim and level work on block and base houses. Some nearby cities have their own rules, such as Bellaire's $130 floodplain development permit for residential foundation work. Ask the contractor to confirm who pulls the permit before work starts.
Sources
- Houston Press, guide to foundation repair in Houston (2026)
- This Old House, foundation repair cost guide (October 2026)
- This Old House, concrete slab cost guide (2026)
- This Old House, crawl space encapsulation cost guide (2026)
- Inch Calculator, concrete slab leveling cost guide
- USDA NRCS, Lake Charles soil series description
- City of Houston weekly building permit report, July 2024
- City of Bellaire, FY2026 master fee schedule
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