The short answer
Most residential foundation repairs land somewhere between a few thousand dollars for a minor crawl-space adjustment and $30,000 or more for a whole-house pier job. A typical Alvin slab needing perimeter piering usually falls in the low-to-mid five figures. Those are ballpark ranges from national cost surveys and Texas market pricing, not a quote for a specific house. The only way to get a real number is an engineer's read of how the foundation has moved and how many piers it takes to fix it. See inspection and diagnosis.
Why it's priced per pier, not per square foot
A foundation quote is built off the number of piers the house needs, not the home's square footage, and that number comes from how much of the foundation has moved and where. Most residential jobs run 6 to 12 piers; one settled corner might need 3 or 4, while a full front wall could need 8 to 12. Piers are typically spaced 5 to 8 feet apart along the affected wall. Per pier, exterior drilled or pressed piers commonly run about $600 to $850 each in the Texas market.
The other major driver is access. Piers along an open exterior wall are the cheap case. If a pier location sits under a porch, patio, sidewalk, or driveway, that concrete has to be broken out and replaced. Reaching an interior beam means tunneling under the slab, which adds real labor.
Typical ranges by scope
Treat all of these as ballpark ranges from national cost aggregators and Texas foundation firms, not a quote. At the small end, a pier-and-beam shim or adjustment in a crawl space typically runs about $2,000 to $4,000 (interior work, no exterior excavation). Move up to a partial slab job, one corner or a short run of piers, and the range climbs to roughly $7,000 to $9,000. A full perimeter slab job, the scope a typical settled Alvin home ends up needing, averages $13,000 to $19,000, and a whole-house job combining exterior and interior piers can run $30,000 to $50,000 or more.
The two non-structural options sit well below all of that: slab jacking (polyurethane foam) to lift a settled section of flatwork runs roughly $1,600 to $5,000, and crack injection is the cheapest line item on the list. Both are cheaper because they don't drive to deep load-bearing strata. They lift a settled slab or seal a crack rather than re-support the structure. On an Alvin house that's actively moving with the clay, either one is a finish step after the structural fix, not a substitute for it.
What moves your number up
The pier count and access set the base. These add to it, and a bare-bones bid often leaves them out so the sticker looks smaller:
- The structural engineer's report (worth paying for on expansive clay): ~$300–800
- Breaking and replacing concrete when a sidewalk, porch, patio, or driveway sits over a pier location
- Interior piering / tunneling under the slab to reach interior beams
- Drainage and root-barrier work, the moisture half that makes the repair last here
- Plumbing or leak repair found once the soil is opened up. A slow under-slab leak is a common find, and a leading local cause of localized heave
Bundling drainage and any plumbing work with the piering is usually the smarter move, since the soil is already open and the crew is already on site.
What's different about cost in Alvin
Two local facts touch the value-for-money math here. First, Alvin's smectitic Vertisol clay (the Beaumont, Bacliff, Lake Charles, and Bernard family under and around the city) is the reason the job exists at all, and it's the reason the cheapest bid is often the most expensive one. A piers-only scope that skips drainage leaves the clay swinging wet-to-dry, so the movement finds somewhere new to go and the house needs a second round. Paying for the drainage and moisture plan up front is what buys the repair its years.
Second, because the driver here is Alvin's roughly four-month, 75-days-a-year-90°F-plus drought, then downpour cycle rather than frost, the prevention spend (soaker hoses, root barriers, grading) is cheap relative to a second pier job, and it's the same spend whether or not piers have already gone in. See preventing foundation damage for the specifics.
Why no calculator can price a foundation job
Some home-service sites offer a size-in, price-out calculator, because their job is priced off one number a homeowner can compute, like a pool's interior surface. Foundation repair isn't like that. The price is pier count times per-pier cost, and pier count comes from an engineer reading the home's settlement pattern, which can't be measured from the driveway. A calculator that turned square footage into a dollar figure would just invent precision it doesn't have. So instead of a fake number, the honest tool is the ranges above, the driver list, and the engineer-report step. Get the house measured, get the scope in writing, and compare bids against that.
Bottom line
For most Alvin homes, plan on the low-to-mid five figures for a perimeter slab repair, less for a crawl-space adjustment, and more for whole-house work. Budget for the drainage that makes it last on this clay. Get an engineer's report, get the scope in writing, and ask what's included before comparing two bids. See choosing a contractor for the full vetting checklist.
Area covered
Alvin, TX (ZIP 77511/77512) and Brazoria County.