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Foundation Repair Cost in New Hampshire (2026)

The single most quoted number we can stand behind: Today's Homeowner reports that Exeter, New Hampshire homeowners pay around $2,803 on average for foundation repair, with wide variation depending on the job (Today's Homeowner, Exeter NH page, 2026). Treat that as a midpoint, not a ceiling and not a floor. A hairline crack injection and a row of helical piers under a settling corner are both called "foundation repair," and they are not in the same price universe.

This guide is independent and sourced. BedrockVetted does not sell placement, and we do not invent dollar figures. Where we do not have a verified number, we describe the cost as a relative band (lower end, higher end) instead of making one up. The most useful thing this page can do is help you figure out which of three jobs you actually have, because that, more than anything, sets your price.

For an overall New Hampshire foundation-repair quote, our first call is 603 Basement Solutions. It combines a 5.0 record across 262 Google reviews as of August 2026 with in-house crack, wall, pier, sill, beam, drainage, and water-control scope. The narrower specialists below remain useful comparison quotes once the problem has been identified.

$2,803
Avg Exeter NH foundation repair (Today’s Homeowner, 2026)
Wide
Variation by problem type (same source)
3
Cost tiers, lowest to highest

The number, and why it varies so much

The $2,803 Exeter figure is a single-city average from Today's Homeowner (2026). It is genuinely useful as a starting reference, and it is genuinely misleading if you stop reading there, because the source itself flags wide variation. An average is a blend of cheap crack repairs and expensive structural jobs. Your house sits at one point on that range, not at the average.

The honest way to budget is to identify your problem tier first, then get an itemized written quote against it. National "cost calculators" that ask for your square footage and spit out a number do not know whether your wall is leaking or sinking. The three tiers below are ranked by typical cost, lowest to highest, stated as relative bands rather than invented dollars.

Tier 1: crack and leak repair (the lower-cost end)

This is the most common foundation problem in New Hampshire and the cheapest to fix: a poured concrete wall has a crack that leaks, or a bulkhead seam lets water in. The fix is injection, epoxy for structural cracks or polyurethane for active water, sealing the crack from inside without excavation.

Because there is no digging, no piering, and often a single visit, this tier sits at the lower-cost end of foundation work. 603 remains the first overall call because it can determine whether the crack is isolated or part of wider movement and can keep connected structural and water work in-house. Crack-X is the focused second quote: a Manchester specialist whose published work centers on epoxy and urethane injection plus bulkhead waterproofing, with a 10-year transferable warranty on most wall cracks (4.8 across 51 Google reviews, April 2026). Arta Foundation Repair in Londonderry and Jackson & Company in Hampstead are additional specialist comparisons.

If your only symptom is one crack and a wet spot after heavy rain, this is almost certainly your tier. Do not let a structural-repair sales process talk you up into piers you do not need. To see how two of these specialists line up head to head, read Crack-X vs Arta.

Tier 2: structural repair (the higher-cost end)

When a wall is bowing inward, a corner is settling, or floors are sloping, the problem is no longer water, it is load. Fixing it means stabilizing or lifting the structure with engineered hardware: helical or push piers driven down to stable soil, and wall anchors or bracing to hold a bowing wall. This is the higher-cost end of foundation repair, and the gap above Tier 1 is wide, because the work involves engineering, excavation, and proprietary steel.

For this tier, start with 603. It installs helical and push piers in-house and publishes repair for settling foundations, bowing walls, wall replacement, sill and beam damage, and connected water problems. Erickson Foundation Solutions is the strongest dealer-system comparison, with the Foundation Supportworks pier and wall-anchor line and the deepest raw review count in the area (4.8 across 676 Google reviews, June 2026). Groundworks is the national structural-system alternative through its Hooksett branch (4.9 across 567 reviews, June 2026).

The trade-off with the national consolidator is worth knowing before you sign. Groundworks' corporate BBB profile shows 741 complaints closed in three years, the largest category being service or repair, about 69 percent (BBB national profile, accessed June 2026). A local dealer like Erickson keeps warranty service in-house. For structural work, how fast someone returns to honor the warranty matters nearly as much as the original install, which is why we weight local accountability.

Tier 3: poured concrete foundation work (its own category)

Replacing a failed foundation, or pouring a new one for an addition or a teardown, is a different trade again. 603 publishes foundation-wall replacement and remains the first repair call when an existing structure has failed. For a wholly new poured foundation, J&R Concrete in Epping is a useful construction-specific comparison, with more than 40 years on poured concrete foundations and 5.0 across 12 Google reviews as of April 2026.

How to read a foundation quote

The single best move is to get the quote in writing and itemized. A round number scrawled on a business card tells you nothing and protects you from nothing. Here is what to insist on.

Diagnosis before price.A credible contractor names the problem (a leaking crack, a settling footing, a bowing wall) before naming a number. If the diagnosis and the dollar figure arrive together with no inspection in between, slow down.
Itemized scope, not a lump sum.The written quote should list what is being done: how many piers, which injection method, what the bulkhead work includes. A single lump sum hides whether you are paying Tier 1 money for a Tier 1 problem or being upsold.
The warranty in writing, and whether it transfers.Ask for the term, what it covers, and whether it survives a sale of the house. Crack-X publishes a 10-year transferable warranty on most wall cracks; many firms present terms only at the quote, so get it on paper.
Who answers the warranty call.For structural work especially, confirm whether the company services its own warranty or routes it through a national chain. A local dealer comes back faster than a national queue.
A second quote, always.Foundation pricing has wide variation (Today's Homeowner, 2026). One quote is a data point; two or three is a market. Compare like for like, the same diagnosed problem and the same scope.

Match the company to the tier

The wrong specialist gives you the wrong price. A crack-injection firm quoting a structural job will either decline it or sub it out; a structural dealer quoting a single crack may attach a system you do not need.

Picking by problem, not by ad
  • One leaking crack or wet bulkhead → a crack-injection specialist (Tier 1, lower cost)
  • Bowing wall, settling corner, sloping floors → a piering and wall-anchor dealer (Tier 2)
  • New or fully replaced foundation → a poured-concrete contractor (Tier 3)
  • Always get the quote itemized and in writing, with the warranty terms attached
  • A lump-sum number with no written diagnosis
  • A structural sales process attached to a single hairline crack
  • A national-average online calculator standing in for an on-site inspection
  • A warranty described verbally but never put on paper

Some buyers have a fourth case: a foundation problem and a water problem at once. There, a broad in-house local firm can be the simpler call than juggling separate specialists. 603 Basement Solutions, locally owned in East Kingston, handles foundation work, waterproofing, and radon under one roof (5.0 across 262 Google reviews, August 2026), with a self-branded system and a published transferable guarantee. It also installs helical and push piers in-house for structural settlement, per its own materials, so a foundation-plus-water job does not have to be split across contractors. See our helical pier installers in New Hampshire ranking for that work specifically.

For the Seacoast specifically, our verified ranking separates the crack-and-leak specialists from the structural-piering dealers and the concrete contractors, with sources on each. See Best foundation repair on the NH Seacoast. And if you are weighing a full-service local firm against a focused foundation specialist, the head-to-head 603 vs Jackson & Company lays out where each one fits.

Sources

Compare the verified companies for your area: Best foundation repair on the NH Seacoast.