Foundation repair, starting with who diagnoses it
Before you compare piers, compare incentives. Here is which symptom belongs to which specialist, why the free inspection is a sales visit, and how to read three quotes that disagree with each other.
What is foundation repair?
Foundation repair is not one service - it is a family of very different jobs that share a name. Underpinning a settled corner, bracing a wall that is leaning inward, re-shimming a pier-and-beam floor and sealing a crack are separate trades with separate price scales. The first decision is not which method to buy. It is who diagnoses you, and whether that person is paid by the hour or paid by the contract.
Signs you need foundation repair
- Doors or windows that used to work now bind, drag on the frame, or need a shove to latch - and it is not just humid weather
- A floor that slopes enough to be obvious with a ball or a marble, or that has developed a springy spot
- Diagonal cracks running from the upper corners of door and window openings, in drywall or in brick
- A basement wall that no longer looks flat when you sight down it from one end
- Exterior brick veneer with a stair-step separation along the mortar joints, or a chimney pulling away from the wall
- A crawl space where a support post has shifted off its footing, or where the girder above it has visibly dropped
- Any of the above appearing or worsening noticeably over a single season rather than a decade
Seeing something not on this list? Browse foundation repair problems by symptom →
How foundation repair actually works
Write down what you actually observed, with dates
Photograph each symptom next to something with a known size, note the room and the direction, and date every photo. Movement that has stopped and movement that is ongoing lead to completely different recommendations, and only a record over time can tell them apart.
Watch forRelying on memory in a conversation with a salesperson. "It has been like that for years" and "it appeared in March" are worth thousands of dollars of difference, and you will not recall which is true under pressure.
Decide who inspects - and read the incentive first
A repair company will inspect for free. A licensed structural engineer will charge you for a few hours and sell you nothing afterwards. Both will look at the same house. Only one of them earns nothing if the answer is "monitor it for a year".
Watch forAn "engineer" who turns out to be on the repair company's staff. Independence means no financial relationship with whoever performs the repair - ask directly, in writing.
Map the symptom to the right specialist
A leaning basement wall is a lateral-pressure problem, not a settlement problem. A sagging crawl-space floor may be a rotted girder rather than a foundation failure at all. Sending the wrong specialist to your house guarantees you get quoted their product.
Watch forGetting three quotes that all propose the same method - that usually means you called three companies that only sell that method, not that three experts independently agreed.
Bid one scope, then reconcile the numbers
Hand every bidder the same written description of the work - ideally an engineer's - then line the returned bids up and ask the outliers why they differ. A bidder proposing far less work is not necessarily wrong, and one proposing far more is not necessarily thorough.
Watch forQuotes that price "per pier" without stating how many piers, and discount pressure with a deadline attached. A condition that took years to develop does not become urgent because a promotion ends Friday.
Monitoring plan and realistic settlement expectations
After structural work, the homeowner gets what was done, what should be watched (cracks, doors, grades), and when a follow-up elevation check is warranted. Repair is not a promise that soil will never move again.
Watch forGuarantees of "permanent forever" with no maintenance or drainage advice. Water management around the foundation is usually part of keeping the repair effective.
What does foundation repair cost?
Foundation work spans an enormous range - from a few hundred dollars for sealing and monitoring to well into five figures for underpinning or wall stabilisation. The variable that moves it most is how many supports are specified and how deep they must go. An independent engineer's assessment usually costs a small fraction of the repair.
See the full foundation repair cost guide - by material, size and region →
If the number is the problem, here are the ways people pay for it →
HomeMatchup does not perform foundation repair. We match you with licensed local foundation repair pros for foundation repair. Free for homeowners — Get matched free · how we verify pros.
When foundation repair is the wrong call
When saying yes is the wrong move:
- Nobody has established that anything is still moving. Many houses carry old, settled-out cracks that stopped decades ago. Repairing a symptom that has finished happening buys you nothing but a receipt. Documenting and re-measuring over months is a legitimate answer, not a stalling tactic.
- You have not ruled out a plumbing leak under or beside the foundation. Water escaping under a slab or against a footing can produce movement that looks exactly like soil settlement. Piers driven into ground that is still being washed out do not fix the cause.
- The real problem is drainage, and drainage is cheaper. Downspouts discharging at the wall, negative grade, a gutter that has not worked in years - these load a foundation continuously, and correcting them has to happen anyway.
- The only diagnosis you have came from the company quoting the work. Not a reason to assume dishonesty. A reason to get a second opinion from somebody with nothing to sell, before committing to an irreversible job.
- The failure is a wood-framing failure, not a foundation failure. A rotted beam end, a cut joist or a removed post can produce sloping floors while the foundation itself is fine.
- You are about to sell and want a fast certificate. A rushed repair chosen for the paperwork rather than the condition tends to be the wrong one, and it becomes a disclosure item either way.
Types of foundation repair
| Option | What it means for you |
|---|---|
| Start with an inspection, not a method | Who is qualified to tell you what is wrong, and who is paying them. |
| Cracks, and nothing else yet | The most common arrival symptom, and the most over-sold one. |
| A slab-on-grade house | Post-tension cables, under-slab leaks, soil moisture. |
| A pier-and-beam house over a crawl space | Shims, settled piers, rotted girders and sills. |
| A basement wall leaning inward | Lateral soil pressure - where water and structure are one problem. |
| Crawl-space support failure | Posts, footings and girder ends, separate from the moisture story. |
| Underpinning method comparisons | Helical vs push piers and the rest, already covered in depth. |
| The hardware itself | Piers, straps, anchors - specifications rather than sales copy. |
What to check when hiring for foundation repair
- Who wrote the diagnosis I am buying from, and do they earn anything from the repair? The single question this whole page exists to make you ask. If the diagnosis and the contract come from one company, you have one opinion, not a confirmation.
- What exactly are you proposing to fix, and what evidence points to that cause? Forces the conversation from product to cause. A good answer references specific measurements and observations. A weak one describes the product.
- Will you bid from an engineer's written scope if I supply one? Contractors who will not are telling you their price depends on writing their own scope. That is exactly the condition that makes three quotes incomparable.
- What happens if the movement continues after this work is finished? Stabilisation is a prediction, not a guarantee of stillness. You want the remedy for a wrong prediction defined before you need it.
- What is covered by your warranty, what voids it, and who honours it if you close? A "lifetime transferable warranty" is a marketing phrase until you read which components it names. Ask specifically whether it covers only the installed supports, or also the finishes, the slab and any water intrusion.
- Can I see the permit and inspection path for this work in my jurisdiction? Structural work frequently requires permitting. A contractor working around that leaves you with an unpermitted structural alteration to disclose at sale.
- How many of these did you do within twenty miles of my house last year? Soil behaviour is intensely local. Local repetition is worth more than a national brand name.
Foundation Repair near you
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Sources
Sources last checked
- Soils and Foundations — residential guidance overviewInternational Code Council (IRC context)Retrieved 2026-08-04Model residential code body most US jurisdictions amend for foundations.
- Occupational Employment and Wages — Construction TradesU.S. Bureau of Labor StatisticsRetrieved 2026-08-04Labor cost context for home-services trades nationally.
Sources for figures and claims on this page.
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