Foundation Inspection: Cost & Scope
When the home inspector says "recommend further evaluation by a structural engineer," most buyers panic — or worse, skip it. Here's exactly what an engineer's inspection costs, what they look for, and which findings actually kill a deal.
Crack triage matrix
| What you see | Likely cause | Action |
|---|---|---|
| Vertical hairline (<1/8") | Concrete shrinkage | Monitor. Seal with epoxy if water entry. |
| Diagonal at corner of opening | Settlement | Engineer inspection. Often piers needed. |
| Stair-step in CMU/brick | Differential settlement | Engineer + piers, $5K–$30K. |
| Horizontal in basement wall | Soil/water pressure | Major — bracing or wall replacement. |
| Gap at sill plate | Foundation moving | Engineer + underpinning likely. |
| Doors not closing + crack | Active movement | Walk or negotiate credit + engineer letter. |
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The HomeScore Inspection Analyzer cross-references every flagged finding against repair-cost benchmarks — including which foundation notes warrant an engineer and which don't.
Frequently asked
How much does a foundation inspection cost?+
Structural engineer inspections run $400–$800 in 2026. A general home inspector flags concerns but cannot stamp a report. If you see horizontal cracks, stair-step cracks wider than 1/4", or doors not closing — pay for the engineer. Otherwise it's the best $500 in real estate.
What's the difference between a home inspector and structural engineer?+
Home inspector observes and reports. Structural engineer diagnoses, designs the repair, and stamps a report your lender / insurer / next buyer will accept. Anything more than cosmetic gets escalated to the engineer.
What cracks are dealbreakers?+
Horizontal cracks (soil pressure pushing in), wide stair-step cracks in CMU walls, gaps in the foundation-to-sill plate, or any crack with active water seepage. Vertical hairline cracks in poured concrete are usually shrinkage — annoying, not structural.
What does foundation repair cost in 2026?+
Minor crack sealing $500–$1,500. Piers (slab or pier-and-beam): $1,200–$3,000 per pier, typically 4–10 needed = $5K–$30K. Full underpinning: $15K–$45K. Sump pump + interior drainage: $4,000–$10,000. Always get 2 bids before negotiating.
Will a lender close on a home with foundation issues?+
Conventional and FHA — usually no until repaired or credited. VA — very strict, often requires a structural engineer's letter clearing the issue. Best play: get the engineer's report inside contingency, request seller-funded repair or full credit.