Slab Foundation Repair Cost (2026)

Most San Antonio and Central Texas homes built since the 1950s sit on a slab, and when the clay under one edge dries out and drops, the fix is slab foundation repair — piers under the settled edge, then a staged lift. Our corridor-wide cost guide covers the universal math; this is the slab-specific layer, with 2026 ranges.

What you’re actually paying for

A slab quote is three numbers multiplied together: how many piers, what type, and how hard the access is. Pier count comes from the elevation survey — affected footage ÷ 6, plus corner logic. Pier type sets the per-pier price: concrete-and-rebar at the value end, steel driven to refusal at the premium end, hybrid in between. Access is everything around the work line — rocky digging, mature trees, decks and pools, and whether interior piers need tunneling under the slab or breaking through finished floors.

Tunneling vs. interior breakout

When a settled area sits in the middle of the house rather than at the perimeter, the piers underneath it can be reached two ways. Tunneling — digging in from outside, under the slab — costs more in labor but leaves your floors untouched. Interior breakout — cutting through the slab and finished flooring inside — is cheaper to access but means repairing floors afterward. Neither is universally “better”; the right call depends on your finishes and the pier locations, and an honest quote shows you the trade.

What makes a slab repair cheaper or more expensive

• Catching it early: the biggest lever you control. A two-pier corner today beats a ten-pier side after three more droughts.
• Access: open perimeters and easy digging sit at the cheap end; tight side yards, river-rock beds, broken concrete, and utility lines add labor hours.
• Method: concrete piers cost less per unit than steel; the soil and structure decide which is appropriate, not the budget alone.
• The extras: a hydrostatic plumbing test when a leak is suspected, a drainage correction so the soil stops swinging, an engineer letter when a sale needs one — each itemized.

Getting your real number

The free inspection produces it the same day for most homes: an elevation map, a marked pier plan, a per-pier price, and a firm total. No phone estimates pretending to be quotes — the measurement does the pricing, which is the only honest order of operations. The calculator gives you a defensible starting figure tonight, before anyone visits.