How Much Does Foundation Repair Cost?

Add up the parts of your job — crack sealing, piering, drainage correction and labor — then apply a contingency to get a realistic planning total from the numbers you were quoted.

Planning estimate: this is a planning estimate from the numbers you enter and standard reference quantities — not a bid or a contract. Get itemized written quotes from licensed contractors and confirm measurements before you commit.
Engineer & permits: Foundation movement, cracks, bowing walls and drainage problems should be assessed by a licensed structural or geotechnical engineer before repair. Structural, excavation and electrical work must be done by licensed professionals and usually needs a permit and inspection. Confirm scope, permits and code with your local building department before you start.

Calculator

$
Epoxy or polyurethane crack repair, from your quote
$
Push or helical piers, if the footing has settled
$
Interior drain tile, sump, regrading or gutters
$
Excavation, patching, cleanup, engineering
A buffer for what the crew finds once work starts
Estimated total$4,600.00
Subtotal (line items)$4,000.00
Piering + drainage$1,800.00
Contingency15% ($600.00)

Your foundation-repair line items add up to $4,000.00; with a 15% contingency that is about $4,600.00. These are your numbers — have a licensed structural or geotechnical engineer assess the problem first, then get itemized written quotes.

There is no single "foundation repair cost" — the figure on a contractor's proposal is the sum of the specific problems your house has, and every house is different. A hairline crack that only needs an injection is a few hundred dollars; a settled corner that needs a row of piers, new drainage and excavation is tens of thousands. That is exactly why this calculator does not carry a price list. It takes the line items you were quoted, adds them up, and layers a contingency on top so your budget survives the surprises that below-grade work always turns up.

Use it three ways: to sanity-check a single bid by breaking it into its parts, to compare two proposals on the same footing, or to build a budget before you even call a contractor by penciling in rough numbers for each category. Because the math is closed-form and every dollar comes from you, the answer stays correct no matter what happens to material or labor prices.

Formula

The total is the sum of your line items grown by the contingency percentage:

subtotal = crack + piering + drainage + labor\ntotal    = subtotal × (1 + contingency%)

The subtotal is a straight add-up of the four cost categories. The contingency is a planning buffer expressed as a fraction (0.15 = 15%); it is applied to the whole subtotal, so a 15% contingency on a $4,000 job adds $600. Nothing else is hidden in the number — no marked-up price table, no regional index, just your figures and a buffer you choose.

Worked example

Say you have a leaking crack, no settlement (so no piers), a wet corner that needs interior drainage, and the crew's labor:

  • Crack sealing / injection: $600
  • Piering / underpinning: $0
  • Drainage correction: $1,800
  • Labor / other: $1,600

Subtotal = 600 + 0 + 1,800 + 1,600 = $4,000. With a 15% contingency the planned total is 4,000 × 1.15 = $4,600. The extra $600 is not padding — it is the money you want available when the excavation exposes a second crack or a soft spot in the soil.

What actually drives a foundation repair bill

Four things move the number more than anything else. The type of movement: a shrinkage crack in poured concrete is cosmetic and cheap; active settlement or a bowing wall is structural and expensive. Access: piers driven from inside a finished basement, or excavation around a deck or mature landscaping, cost far more than the same work on an open, walk-around lot. Depth to stable soil: helical and push piers are priced partly by how far they have to go to reach load-bearing strata, which no calculator can know without a soil report. Water: many "foundation" problems are really drainage problems, and fixing the water is often cheaper than fixing the wall it damaged.

Because the diagnosis controls the price, the honest first step is an assessment, not an estimate. A widening crack, a door that suddenly sticks, a stair-step crack in block, or a floor that slopes are all signs of movement that a licensed structural or geotechnical engineer should evaluate before anyone quotes a repair. An engineer's report also gives you an independent scope to hand to contractors, so their bids describe the same work and this calculator is comparing apples to apples.

Treat the output as a planning estimate, never a bid. It reflects the categories you entered and nothing you forgot; permits, engineering fees, temporary shoring, dewatering and restoration of finishes are easy to leave off and easy to add as another labor line. When you have firm numbers, feed them back in and lean toward the 20% contingency for an older home.

Frequently asked questions

Why does this calculator not just tell me the price?
Because an honest price depends on your soil, the type and extent of movement, and access — none of which a generic table knows. Fixed "cost per repair" figures found online age quickly and vary by region and market. This tool instead structures your quoted numbers into a clean total with a contingency, which is what you actually need to budget.
What should I put in the "drainage correction" box?
Anything that manages water: interior drain tile and a sump, exterior French drains, regrading, downspout extensions or gutter work. Many foundation problems are water problems, so this line is often the difference between a repair that lasts and one that fails again. You can size the pieces with the drainage and waterproofing calculators and bring the totals back here.
How big a contingency should I use?
Ten percent is reasonable for straightforward work on a newer home; fifteen percent is a sensible default; twenty percent is prudent for an older house or a job that requires excavation, where the crew is likely to uncover something once they open things up. The buffer is money you hope not to spend, not a target to hit.
Does the total include permits and the engineer's report?
Only if you enter them. Permit fees are local and the engineering assessment is usually a separate invoice, so add them to the labor / other line to keep your total complete. Confirm what permits your project needs with your local building department before work begins.
Is a foundation repair worth it for resale?
A sound foundation protects the value of everything above it, but the dollar figure "added" by a repair is never guaranteed and depends on your local market. If you want to reason about that, the repair ROI calculator turns your own protected-value and cost figures into a plain recoup ratio — as illustrative math, not financial advice.

Related calculators

Piering / Underpinning CostEstimate how many piers your foundation needs from the affected length and spacing, times your price per pier — a planning-estimate underpinning total.Foundation Crack Repair CostEstimate foundation crack repair cost from the crack length and your price per foot for epoxy or polyurethane injection, plus any setup fee.Contingency PlannerAdd a contingency buffer to your basement or foundation repair subtotal. Pick 10%, 15% or 20% and see the buffer and planned total instantly.