A foundation inspection is a close check of a building's foundation and the signs of movement around it, carried out to find out whether the structure has a problem, what caused it and what needs fixing. A home inspector, a repair contractor or a structural engineer can do one, but those three inspections are not the same thing. The right choice depends on the question you need answered.
If you are buying a house, have spotted a crack, or an inspection report told you to "consult a structural engineer", you are not alone in wondering who to call. In this guide I will explain who can inspect a foundation, what they check, what each option costs in 2026, how to read the report, and how buyers and sellers should use it.
Short answer
Use a home inspector for a whole-house check when you buy. Use a structural engineer when you see signs of movement, because an engineer finds the cause and writes the repair scope. A free inspection from a repair company is a sales visit. An engineer's foundation inspection costs about $600 on average, with a typical range of $300 to $1,000, and takes one to two hours.
Buying a home
Home inspector first
A wide check of the house, with referrals for anything structural.
Pricing a repair
Contractor quotes
Useful for prices, once the scope is settled.
Signs of movement
Structural engineer
Independent cause, severity and repair scope in writing.
Who Should Inspect Your Foundation?
Three people commonly look at foundations, and they do different jobs. Below I am sharing the differences in a table.
| Factor | Home inspector | Repair contractor | Structural engineer |
|---|---|---|---|
| Main job | Whole-house visual check | Sell and carry out repairs | Diagnose and specify |
| Typical cost | $343 on average | Often free | About $600 on average |
| Finds the cause? | Not required to | Gives an opinion | Yes |
| Independent? | Yes, if hired by you | No | Yes, if not paid by a contractor |
| Written repair scope? | No | A sales proposal | Yes |
| Best for | Buying a home | Pricing an agreed scope | Any structural concern |
As the table shows, the choice comes down to the question you are asking. ASHI's Standard of Practice says a home inspector is not required to provide engineering analysis or an opinion on structural adequacy, so a report that recommends an engineer is doing its job. Our guide to the structural engineer vs home inspector explains the difference in full.
What Does a Foundation Inspection Check?
A good inspector reads the whole house, because the pattern of damage matters more than any single crack. Below I am sharing what a typical visit covers.
- The site: Grading, drainage, gutters, downspouts and nearby trees show where water and soil movement may come from.
- The outside walls: Brick and block cracks, leaning walls and gaps around openings show which way the house moved.
- The rooms: Sloping floors, sticking doors and cracks at corners point to the low area.
- Floor levels: An engineer may take elevation readings across the floor to map the movement.
- The basement or crawl space: Foundation walls, piers, beams and joists show the condition of the structure.
- Moisture: Water marks, wet soil and leaks often explain the movement.
- Past repairs: Patches, piers or braces show that someone has dealt with this before.
How Much Does a Foundation Inspection Cost?
The price depends on who you hire, the size of the house and how easy the foundation is to reach. Below I am sharing typical prices in a table.
| Service | Typical cost | Source |
|---|---|---|
| General home inspection | $343 on average ($296–$424) | HomeAdvisor, via Bankrate |
| Engineer's foundation inspection | About $600 ($300–$1,000) | This Old House, 2026 |
| Engineer's hourly rate | $100–$500 per hour | This Old House, 2026 |
| Complex engineering work | Up to about $3,000 | This Old House, Apr 2026 |
| City permit, where needed | $100–$400 | This Old House, Apr 2026 |
| Contractor's inspection | Often free | Sales visit |
As the table shows, an independent opinion costs far less than most repairs. Use this simple sum to judge whether it is worth paying for one:
Value of an inspection = cost of the repair you avoid or reduce − inspection fee
Example: Suppose a contractor proposes 8 piers at $1,000 to $3,000 each, or $8,000 to $24,000. An engineer's inspection for $600 finds that only 4 piers are needed. You save at least $3,400 even at the lowest pier price.
How to Prepare for a Foundation Inspection
A little preparation gives you a better answer. Below I am sharing what to do before the visit.
- Gather records: Collect past reports, repair invoices, warranties and permits.
- Write a timeline: Note when each crack appeared and whether it has changed.
- Clear access: Move storage away from foundation walls, and open the way to the crawl space.
- Mark your concerns: Note the doors, floors and cracks that worry you.
- List your questions: Ask for the cause, the severity, the urgency and the repair.
How to Read a Foundation Inspection Report
This Old House says an engineer's report usually contains photos, an explanation of the issues and recommendations for repairs or further testing. Below I am sharing what a useful report should tell you.
| Section | What to look for | Red flag |
|---|---|---|
| Observations | Locations, measurements and photos | General comments with no numbers |
| Cause | A stated cause with reasons | No cause given |
| Severity | Whether movement looks active or old | Alarming words with no evidence |
| Recommendations | A repair scope and its urgency | A brand name with no reasoning |
| Limits | What could not be seen | No mention of hidden areas |
| Credentials | License number and signature | No named professional |
As the table shows, a useful report separates what was measured from what was concluded. If you cannot follow the reasoning, ask the engineer to explain it. Then use the scope to collect quotes, and compare them with our repair quote checklist.
How Should Buyers and Sellers Use an Inspection?
Timing and paperwork matter most in a sale. Below I am sharing the main points for each side.
- Buyers: Book the engineer as soon as the home inspection flags the foundation, so that you finish before your contingency ends. Our guide to buying a house with foundation problems shows how to turn the report into a better price.
- Lenders: FHA, VA and conventional loans can all require structural defects to be repaired before closing, so tell your loan officer early.
- Sellers: Nolo reports that nearly every state requires sellers to disclose certain known material defects, so a report you order may need to be disclosed.
- Both sides: Keep the engineer's report, the invoices, permits and warranty together, because the next buyer will ask for them.
So, What Kind of Inspection Do You Need?
The answer depends on your situation.
- If you are buying and see no problems: A home inspection is enough to start.
- If the report flags the foundation: Hire a structural engineer before your contingency ends.
- If you own the house and see movement: Go straight to a structural engineer.
- If you only see hairline cracks: Mark and monitor them first.
- If a contractor has given you a large quote: Pay for an independent inspection before you sign.
- If you are selling and already know of cracks: Get an engineer's report so that you can price or fix the problem.
What You Should Do: Decide what question you need answered, then hire the person who answers it. For anything structural, that person is a licensed engineer who does not sell repairs.
Common Mistakes to Avoid With Foundation Inspections
- Treating a home inspection as a structural sign-off: Its standard does not require an opinion on structural adequacy.
- Treating a free inspection as independent: It is a sales visit.
- Hiring an unlicensed "engineer": Check the license with your state board.
- Waiting until the last day of a contingency: Engineers can be booked days ahead.
- Patching cracks before the visit: Filler hides evidence the inspector needs.
- Asking only "is it bad?": Ask for the cause, the repair and the urgency.
Conclusion
A foundation inspection only helps if the right person does it. A home inspector gives you a wide check, a contractor gives you a price, and a structural engineer gives you the cause and the repair. An engineer's inspection costs about $600 on average, which is small next to most repairs. Keep the report and use it in any quote, sale or negotiation. For more help, read our independent advice for buyers and sellers.
Frequently Asked Questions
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How much does a foundation inspection cost?
This Old House puts a structural engineer's foundation inspection at about $600 on average, with a typical range of $300 to $1,000. Engineers charge about $100 to $500 per hour. A general home inspection averages $343 and covers the whole house, but only by sight.
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How does a structural engineer check a foundation?
An engineer inspects the exterior, the interior walls and floors, and the basement or crawl space, then looks for a pattern of movement. Measurements of cracks, wall bow and floor levels show where the house has moved. This Old House says a visit takes about 90 minutes.
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Do you need a structural engineer for foundation repair?
You should use one for structural work, such as a bowing wall, a sinking footing or a large pier job. An engineer gives you an independent diagnosis and a written scope for contractors to price. Some towns also require engineered plans, so ask your building department.
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Is a free foundation inspection really free?
The visit is usually free because it is a sales call. The company earns money from the repairs it recommends, so treat the visit as a quote and not as an independent diagnosis. It costs you nothing to accept one, but get a second opinion before you commit to a large repair.
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Should a seller get a foundation inspection before listing?
It often helps if you already see cracks or sloping floors. A report lets you fix the problem or price it in before a buyer's inspector raises it. You may then have to disclose what the report found, so check your state's disclosure rules first.
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How long does a foundation inspection take?
This Old House says a structural engineer's inspection takes about 90 minutes, and that most take one to two hours. Finished basements and tight crawl spaces take longer. The written report usually follows after the visit, so ask when you will receive it.
Sources and Standards
- This Old House, How much does a foundation inspection cost?, 2026.
- This Old House, Foundation inspection: why hire a structural engineer, updated April 2026.
- American Society of Home Inspectors, Standard of Practice for Home Inspections, effective March 1, 2014.
- Bankrate, How much does a home inspection cost?, citing HomeAdvisor.
- NCEES, Licensure.
- Nolo, Selling a house with defects: what you must disclose.
- U.S. Department of Veterans Affairs, VA Lenders Handbook, Chapter 12: Minimum Property Requirements.
- Fannie Mae, Selling Guide B4-1.3-06.