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Foundation inspection: engineer vs. contractor
A foundation contractor's free inspection is a sales visit by someone who sells piers. An independent structural engineer inspects the same house for $300–$1,000 Source: Bob Vila — How Much Does Foundation Repair Cost?, updated 2024-05-29 and writes the report that says whether you need work at all, and if so, exactly how much. Get the engineer first; then let contractors bid to the report.
What each one gives you
| Contractor “free inspection” | Independent structural engineer | |
|---|---|---|
| Cost | $0 (built into the bid) | $300–$1,000 |
| Incentive | Sells the repair | Sells the opinion |
| Output | A proposal with a pier count and price | A stamped report: cause, whether movement is active, scope if any |
| Can it say “do nothing”? | Rarely | Routinely |
| Use at sale / with insurer | Weak | Standard |
Engineer report range: Bob Vila — How Much Does Foundation Repair Cost?, updated 2024-05-29. The contractor column describes the sales model, not a price list.
Foundation inspection checklist
- Relative elevation survey of the floor: the measurement that shows where, and how much, the slab has moved.
- Crack mapping: location, width, pattern (stair-step, vertical, horizontal), and whether they are growing.
- Water: gutters, downspout discharge, grading, sprinkler pattern, plumbing leak test under the slab.
- Trees and fill: large trees within the height of the tree from the house, and signs of poorly compacted fill.
- Soil: the public survey (start with the lookup below) and, only when warranted, borings.
Structural engineer foundation inspection cost
A structural engineer's foundation inspection with a written report is published at $300–$1,000. Source: Bob Vila — How Much Does Foundation Repair Cost?, updated 2024-05-29 The price moves with the house size, whether a full relative elevation survey is included, and whether you need a stamped letter for a sale, a lender or an insurer. A geotechnical soil report with borings is a separate line at $500–$3,000 Source: This Old House — Foundation Repair Cost, updated 2026-03-06 and is rarely needed to decide a residential repair.
Against a repair quote in the thousands, the report is the cheapest line on the page relative to what it decides. It routinely ends in “monitor” or “fix the water” rather than piers, which a contractor's free inspection almost never does.
Is a free foundation inspection worth it?
As a bid, yes: it is free because it is priced into the repair, and a bid is what it produces. As a diagnosis, no: the person doing it sells the repair and almost never writes “do nothing.” Take the free inspection after the engineer's report, hand over the report, and ask for a bid to that scope.
“Foundation inspection near me”: who actually shows up
That search returns three different services under one name. Knowing which one you booked is most of the value.
- A foundation repair contractor. Free, fast, and the output is a proposal. Useful as a bid once you have a scope, not as a diagnosis.
- A home inspector. Generalist, part of a purchase inspection. Will flag cracks, sloping floors and moisture but will not diagnose cause or specify a repair; the standard next line in their report is “recommend evaluation by a structural engineer.”
- A licensed structural engineer. The only one of the three who measures, diagnoses, and can say the house does not need work. Also the only one whose report a lender, insurer or buyer treats as standard.
The map pack at the top of that search is contractors and home inspectors. Engineers rarely buy ads; find them through the state license lookup below.
What a foundation inspection report should contain
- A relative elevation survey: a floor-plan sketch with elevations, so the direction and size of movement is on paper.
- A crack map with widths and patterns, and any measurements of wall deflection.
- The engineer's read of cause: soil movement, drainage, plumbing leak, fill, trees, framing.
- Whether movement appears active or historic, and what would confirm it (a re-survey in six to twelve months is a legitimate answer).
- A scope, if any: pier type, count, locations and depth criterion, plus the moisture measures. This is the document contractors bid to.
- The engineer's stamp and license number. Without it, a buyer, lender or insurer will ask for another report.
Check the soil under an address
USDA soil survey, read for the top 60 inches under the address. Free, no account, nothing is sent to a contractor.
Usually 1–3 seconds. The USDA service occasionally takes longer.
How to find an independent engineer
- Your state engineering board's license lookup (search “professional engineer license lookup” plus your state); confirm the license is active.
- Ask two contractors which engineers they work with, then hire one neither of them named.
- Ask whether the engineer, or their firm, sells or installs repairs. If yes, keep looking.
Cost guide for what the report may recommend: foundation repair cost by method →
Questions people ask
How much does a foundation inspection cost?
A contractor's inspection is usually free because it is a sales visit. An independent structural engineer's inspection and written report is published at $300–$1,000. A geotechnical soil report with borings is $500–$3,000 and rarely needed for a residential decision.
What happens during a foundation inspection?
An engineer measures floor elevations across the house (a relative elevation survey), maps cracks and their pattern, checks doors/windows, drainage and grading, looks for plumbing leaks and tree influence, and reads the soil. The report says whether movement is active, its likely cause, and what, if anything, to do.
Is it illegal to sell a house with foundation issues?
No, but in most states known defects must be disclosed on the seller's disclosure form. An engineer's report is what turns 'issues' into a documented, priced item at sale.
The home inspector flagged the foundation. Now what?
A home inspector reports what they saw and refers you on; they do not diagnose. Before closing, get a structural engineer's letter (published at $300–$1,000): it turns 'foundation issues' into a priced scope you can negotiate, a reason to walk, or a reason to stop worrying. Ask the seller for any prior engineer reports and repair warranties, and whether the warranty transfers.
How do you know if the foundation of a house is bad?
Stair-step cracks in brick, doors and windows that stop closing, sloping floors, separation at the roofline or between wall and ceiling, and cracks that widen over months. Hairline drywall cracks alone are common and usually cosmetic.
We are not engineers and this is not an engineering opinion. We report public soil-survey data and published price ranges. Nothing here states that a specific house is or is not structurally sound; a licensed structural engineer who has seen the house can.