How much does rebuilding your house’s foundation cost?

Most homes never need a full foundation rebuild. They need a targeted repair, and that runs anywhere from $1,000 to $3,000 for a single crack injection up to helical piers at $2,700 per pier for the first three, then $2,200 per pier after that when the footing has settled. A true foundation-wall rebuild or replacement is rare. We price that after we see it, because every wall fails its own way.

So before you brace for the worst number, let us walk you through what your foundation probably needs.

Here in New Hampshire, most “my foundation is failing” calls turn out to be a wall problem, not a whole-house problem. The soil around your foundation is disturbed backfill. That is the looser dirt that got put back when your house was built. It drains slow and holds water. Then frost heave pushes against the wall every winter. Over years that bows a wall inward or cracks it. That is a repair, not a teardown.

What actually drives the cost

The fix depends on what is moving and why.

A crack that weeps water gets epoxy or polyurethane crack injection. That is the low end at $1,000 to $3,000. If a wall is bowing but still sound, carbon-fiber straps lock it in place for $850 each. A wall that needs more muscle gets a power brace at $1,300 per brace. Those are all wall-stabilization fixes, and most foundations we see fall right here.

When the problem is below the wall, you are into support work. A footing that has settled gets helical or push piers at $2,700 per pier for the first three, then $2,200 per pier after that to carry the load back down to stable ground. A sagging floor framing gets lally columns or floor support at $1,300 to $2,500. A rotted sill or beam gets sill and beam replacement at $7,000 to $40,000. If a section of wall is too far gone to stabilize, we can build an auxiliary wall (some folks call it a sister wall) at about $1,350 per linear foot.

A handful of jobs have no set price. A full foundation-wall rebuild, wall anchors, or steel I-beams all depend on what we find. We price that after we see it.

One thing to know up front. We do repair, not new construction. If you are pouring a brand-new foundation under an addition or a new build, that is a general contractor job, not ours. What we do is save the foundation you already have.

You may not need any of this yet

A hairline crack in a poured wall is often just concrete curing. It is not always structural. A little dampness at the floor wall joint usually points to a water problem, not a failing wall, and that is a waterproofing fix, not foundation work. We will tell you when a crack can wait and when it cannot. Free inspection, free estimate, and we get the quote back to you within 24 hours.

We self-perform the structural lifting and the helical installs ourselves. No middleman, no markup on someone else’s crew.

How we figure out which fix you need

We come out and look. We check the wall for bowing, the cracks for movement, the floor for slope, and the soil and water around the outside. NH frost and our wet spring soil show up in patterns, so we read the wall before we quote it. The free inspection is how you find out whether you are looking at a $1,000 to $3,000 injection or real support work, with no guesswork and no pressure.

Most of our foundation work carries a 25-year warranty. Helical piers, carbon-fiber stabilization, and the wall vapor barrier are all 25-year. Floor support and power posts run 10-year, and crack injection is 10-year. The warranty transfers to the next owner, as long as no other contractor touches the work.

You can read the details on our structural and foundation repair page, and dig deeper on foundation repair, helical piers, sill replacement, and supplemental support. Our full 603 guarantee lays out every warranty term.

If your real worry is water in the basement, start with basement waterproofing or crawl space services instead. Foundation movement and water often travel together, and the Insurance Information Institute notes that gradual foundation and water damage is commonly excluded from standard homeowner policies, so catching it early matters. For building-science background on backfill and drainage, the Department of Energy’s Building America program (basc.pnnl.gov) is a solid neutral read.

Ready when you are

Want a real number instead of a guess? Call us at 603-610-1770 or book your free inspection. We will come look, tell you what your foundation actually needs, and get you a quote within 24 hours.

Related questions

Do I need a full foundation replacement or just a repair? Almost always a repair. Bowing, cracking, and settling are usually fixed with crack injection, carbon-fiber straps, a power brace, or piers. A full wall rebuild is rare, and we price that after we inspect it.

How much does it cost to fix a settling foundation? Settling that comes from a footing problem is carried by helical or push piers at $2,700 per pier for the first three, then $2,200 per pier after that. Sagging floor framing gets lally columns at $1,300 to $2,500. A free inspection tells you which one you need.

Are foundation repairs covered by homeowners insurance? Often not. The Insurance Information Institute notes that standard policies commonly exclude gradual foundation settlement and earth movement. Check your own policy, and fix small problems before they grow.

Does 603 build new foundations? No. We repair and stabilize the foundation you already have, including piers, straps, sill replacement, and auxiliary walls. New foundation pours for additions or new construction are a general contractor job.