Last updated: 2026-05-15.
Quick answer: Foundation repair in the Madison metro runs from $400 per crack on the low end (polyurethane injection on a single vertical crack) to $30,000 or more on the high end (whole-house helical pier underpinning paired with interior drain tile). Most homeowners pay $1,500 to $8,000 for a single-issue repair and $12,000 to $35,000 for a whole-system fix. Free inspection, written quote before any work starts.
| Service | Unit price | Typical home total |
|---|---|---|
| Foundation inspection (homeowner) | Free | Free |
| Written engineering report (for real-estate) | $250-$400 | $250-$400 |
| Polyurethane crack injection | $400-$600 per crack | $400-$1,800 (1-3 cracks) |
| Epoxy crack injection | $500-$800 per crack | $500-$2,400 |
| Carbon-fiber wall strap | $500-$800 per strap | $2,500-$6,400 (5-8 straps) |
| Helical wall anchor | $700-$1,200 per anchor | $3,500-$9,600 |
| Helical pier (underpinning) | $1,500-$2,500 per pier | $10,000-$30,000 (4-12 piers) |
| Push pier (underpinning) | $1,800-$3,500 per pier | $10,000-$30,000 |
| Interior drain tile + sump system | $70-$110 per linear foot | $3,500-$12,000 |
| Exterior excavation waterproofing | (by perimeter) | $8,000-$18,000 |
| Sump pump install (stand-alone) | (unit + labor) | $450-$900 |
| Sump pump with battery backup | (unit + labor) | $1,200-$2,500 |
| Egress window install | (per window) | $3,000-$5,500 |
| Concrete leveling (slab) | $3-$8 per square foot | varies by slab |
Five factors. Access is the largest. A pier location under a finished patio adds $800 to $1,500 for the demo and rebuild. A drain-tile run through a finished basement adds $1,000 to $3,500 for the drywall and trim demo and the rough-in carpentry. Soil depth-to-bearing is the second largest: a Verona home over compacted till hits load at 15 to 20 feet, a Waunakee home over former marshland sometimes needs 30 to 45 feet of pier shaft. Wall material drives the third factor: a 12-inch limestone wall in Stoughton costs more to drill than an 8-inch poured wall in Sun Prairie, and a rubble-stone Norwegian-heritage wall in downtown Stoughton runs higher still because the rebuild uses hand-mixed lime mortar, not modern Type S. Engineering paperwork is the fourth, a $250 to $400 line when the scope requires it. Hardscape and landscape is the fifth: a paver patio over a pier, a deck over a wall section, mature trees against the foundation, all of those add cost we cannot quote off a phone call.
Foundation contractors who refuse to publish ranges almost always charge more than the ones who do. The reason is simple: a homeowner who walks into a quote with no reference point is a homeowner who will accept the first number on the page. Our pricing pages exist so the inspection conversation starts with the math already on the table. If a competitor's quote is more than 30 percent above the ranges here on identical scope, ask them to itemize. If it is more than 30 percent below, the same. Real Madison-area foundation work sits in a narrow band because the material costs and the engineering paperwork are the same for everyone.
Polyurethane crack injection on a single vertical crack in a poured-concrete wall: $400 to $600. One day on site, lifetime warranty on the seal. If the same crack is also moving (active settlement, not just static seepage), polyurethane is the wrong fix and we will tell you so during the inspection.
A whole-house helical pier underpinning paired with full interior drain tile and re-leveling: $25,000 to $35,000. We see these most often in Waunakee on the Castle Creek and Kilkenny Farms organic-muck lots, where pier shafts run 30 to 45 feet deep and pier counts reach 10 to 12.
We work with a third-party financing partner on projects over $5,000. Typical terms are 0 percent for 12 to 18 months on approved credit, longer-amortization fixed-rate plans on larger jobs. Financing details go on the written quote alongside the cash price, no application required to receive a quote.
The unit prices, rarely. Steel, polyurethane, carbon fiber, and engineering paperwork cost roughly the same for every Madison-area contractor, and the margins are not large. What is negotiable: scope and timing. We can sometimes phase a project across two seasons (interior drain tile this year, exterior regrading next), or substitute carbon fiber for wall anchors where engineering supports it. Be skeptical of any contractor who drops 20 percent off the top to close a sale.
Three likely reasons. First, our quotes include engineering paperwork where the scope calls for it ($250 to $400 line item that some contractors omit until the inspector flags the permit). Second, every pier is load-tested to 1.5x design load before backfill, which adds a few hours per pier. Third, we warranty the structural repair for life, and the warranty is funded against actual job profitability, not boilerplate. A 30-plus-percent-cheaper outlier usually means one of those three is missing.
Walk the exterior with a feeler gauge, measure crack offsets, check lot grade with a six-foot level at the foundation perimeter. Walk the basement, map cracks on the interior, check displacement at floor-to-wall joints, run a zip-level across the slab. Pull soil context from the Dane County survey if the lot is in a zone we have not worked recently. Quote either on the spot or within 24 hours. 60 to 90 minutes start to finish, no obligation, no sales pressure.
Last updated: 2026-05-15.
