Foundation repair is priced per support point, not per square foot. Two houses of the same area can need very different numbers of piers. A per-square-foot figure hides exactly the variable that decides the price.

Why the count varies so much across Austin

The mapped soil here is dominated by Brackett-Rock outcrop complex, 1 to 12 percent slopes and runs to 54% clay, and it is not uniform street to street. Depth to competent ground sets the cost of each support point. It is measured during installation, not read off a table. That local variation is precisely what a per-square-foot figure averages away.

The reasoning behind that

Area is not what the work scales with. The crew installs discrete support points. The count comes from where the structure has moved and what carries load above it, not from how much floor the house has. A large house that has moved in one corner may need fewer piers than a small house that has settled along a whole side. Per-square-foot figures survive because they make quotes feel comparable. They do the opposite: two firms quoting different pier counts at the same per-foot rate are quoting different jobs, and the rate conceals it. Ask instead for the count, the locations, whether each is interior or perimeter, and the expected depth. Those four make two quotes genuinely comparable and they are the same four a survey produces. A firm that will only quote per square foot has either not measured the house or is not pricing from the measurement.

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