How much does a 1000 square foot foundation cost?

A brand-new 1000 square foot foundation poured under a new build or addition is a general contractor job, and 603 does not pour those, so there is no square-foot number we can give you. What 603 does is repair the foundation you already have, and that is almost always what people are really asking about. A single crack injection runs $1,000 to $3,000. Bigger support work like helical piers runs $2,700 per pier for the first three, then $2,200 per pier after that. We give you a real number after a free inspection, with the quote back within 24 hours.

When a homeowner searches “1000 square foot foundation cost,” they usually mean one of two things: a new pour for new construction, or a roughly 1000 square foot house with a foundation that is cracking, bowing, or settling. Most of our calls are the second kind, where the house is already standing and the foundation just needs fixing.

Why size alone does not set the price

Foundation repair is priced by what is wrong and where, not by the square foot. Two houses the same size can need very different work: one has a single weeping crack, the other a wall bowing inward with a dropped corner. Square footage does not tell us that. The damage does, which is why we look before we quote.

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, the looser dirt put back when the house was built. It drains slow and holds water, then frost heave pushes the wall every winter, and over years that bows 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 at $1,000 to $3,000, the low end where most foundations we see fall. A bowing but still-sound wall gets carbon-fiber straps at $850 each. A wall that needs more muscle gets a power brace at $1,300 per brace.

When the trouble is below the wall, you are into support work. A settled footing gets helical or push piers at $2,700 per pier for the first three, then $2,200 per pier after that, carrying the load down to stable ground. 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. A section of wall too far gone to stabilize gets 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 depend on what we find, so we price those after we see them. Same goes for a brand-new pour, a new-construction number that is not ours to quote. We self-perform the structural lifting and helical installs ourselves, so there is no middleman and no markup on someone else’s crew.

You may not need any of this yet

A hairline crack in a poured wall is often just the concrete curing, not 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. We will tell you when a crack can wait and when it cannot.

If the real worry is water, start with basement waterproofing or crawl space services instead. Foundation movement and water often travel together. The Insurance Information Institute notes that gradual foundation and water damage is commonly excluded from standard homeowner policies, so catching it early matters.

How we figure out which fix you need

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

Most of our foundation work carries a 25-year warranty: helical piers, carbon-fiber wall stabilization, and the wall vapor barrier. 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.

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

Related questions

Is foundation repair priced by the square foot? No. It is priced by the damage. A single crack injection runs $1,000 to $3,000, while a settled footing carried by helical piers runs $2,700 per pier for the first three, then $2,200 per pier after that. Two same-size houses can need very different work, so a square-foot price would only mislead you.

Does 603 pour a new foundation? No. We repair and stabilize the foundation you already have, including crack injection, carbon-fiber straps, piers, sill replacement, and auxiliary walls. A brand-new pour for an addition or a new build is a general contractor job.

How much to fix a settling foundation on a small house? 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 your house needs.

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.