Many foundation problems look alike from inside the house: a sticking door, a crack over a window, a floor that is no longer flat. Different causes call for very different repairs, from sealing a hairline crack to adding supports under a beam. An inspection narrows that down, and it is also how a contractor builds a written price.
What gets checked
| Area | What the inspector looks for |
|---|---|
| Outside walls and footing line | Cracks, stair-step patterns in brick, gaps, bulges, grading that sends water to the wall |
| Inside walls, ceilings and floors | Cracks, doors and windows that stick, slopes, bounce |
| Crawl space | Piers, posts and girders, joist condition, signs of rot or insects, standing water or damp soil |
| Drainage | Gutters and downspouts, slope away from the house, low spots |
| Moisture and humidity | Stains, condensation, vapor barrier condition, equipment such as a dehumidifier |
| Past repairs | Old patches, added supports, permit history |
A visit usually includes measurements, a level or laser, and photos. A good contractor shows you what they see and what it means, rather than only quoting a total. Not every crack or sticking door is a foundation problem, and an honest inspection sometimes ends with “this is cosmetic”. See signs of foundation problems to check what you can see yourself first.
Contractor visit or structural engineer
| Contractor visit | Structural engineer you hire | |
|---|---|---|
| Who it’s for | Most homeowners with a visible problem | Large, unusual or disputed problems; buyers; people wanting an independent view |
| What you get | A walk-through and a written repair plan and price | A written report on cause and recommended repair |
| Who benefits from the repair | The contractor, if you hire them | Nobody, because the engineer does not sell the work |
| Cost reference | Set by the contractor; ask on the call | HomeGuide: $300–$750; Homeyou Charlotte: $250-$600 |
The two are not exclusive. Some owners pay for an engineer’s report and then get contractor bids against it; others start with contractor estimates and bring in an engineer if the quotes disagree. The inspection versus engineer guide goes deeper. Published fee sources disagree: HomeGuide, HomeAdvisor and This Old House each give different ranges for an engineer’s report, partly because scope differs.
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The crawl space part
If your house sits over a crawl space, the underfloor check is often where the answer is. North Carolina’s home inspector standards require inspectors to probe structural components where deterioration is suspected, and a foundation contractor does the same. If the inspection points to a sagging floor, the next pages are sagging floors over a crawl space and joist and girder repair.
Buying or selling
For a purchase, a standard home inspection is a starting point, not the last word: the standards note inspections are not technically exhaustive. North Carolina’s disclosure statement asks sellers about foundation defects and about water seepage or dampness, and it notes that structural issues remain material facts even after repair. The selling guide covers both sides.
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After the inspection
Expect a written plan that names the problem, the repair and a price. Structural repair needs a permit, which the contractor pulls. Costs vary a lot by scope; foundation repair cost shows the ranges.
How to prepare for the visit
- Clear access to the crawl space hatch and any utility areas, and tell the contractor about low clearance or locked panels.
- Write down what you have noticed and when: cracks, sticking doors, slopes, damp smells, musty air.
- Bring any past inspection reports, permit records or disclosure forms.
- Note plumbing leaks, drainage changes, tree removal or past repairs.
- Ask that the visit includes the crawl space if the house has one, not only the outside.
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What the written plan should include
| Item | Why it matters |
|---|---|
| The problem named in plain language | So you can compare quotes on the same diagnosis |
| Photos or measurements | Evidence for each repair item |
| A line-item scope | The number of supports, joists or feet of wall, not just a lump sum |
| Permit responsibility | Who pulls it and who pays |
| Whether the cause is being fixed | Water, grading or a failed support |
| Terms of any written coverage | Exactly what is covered and for how long, in writing |
A plan that names a problem but skips the cause is a quote for symptoms. Ask what happens if the issue returns, and whether any monitoring is recommended.
The soil question
People often ask whether Charlotte soil is “the problem”. The honest answer is that Mecklenburg County has several soil units, rated from low to very high for shrink-swell in the county survey, and neighbouring lots can differ. Only the parcel’s own soil map or a contractor’s inspection settles it for your house. Soil rarely explains a foundation problem alone; water, grading and construction details matter too. The Charlotte soil guide lays out what the survey says.
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What an inspection can’t do
An inspection is a look at one day, not a forecast. Soil moisture changes with the season, a dry spell can open cracks that close again after rain, and what is visible from a crawl space hatch is not everything. A contractor may suggest monitoring, repeat measurements, or a structural engineer’s opinion if the picture is unclear. That is a reasonable answer, not a dodge. Be wary instead of an inspection that ends in a quote for the most expensive repair without explaining what the evidence is.
Before you sign
- Get at least three written estimates and compare scope, not only totals.
- Be wary of an alarming list of “needed” repairs from a low advertised price; the NC Department of Justice warns about that pattern.
- Ask to be shown each problem they are quoting for.
- Contracts signed at your home can usually be canceled within three days, per NC DOJ; ask about this.
Want a contractor to look at it? Call to schedule an inspection.