The Short Answer
Engineer first. Not because repair companies are villains — many do excellent work — but because of a structural conflict of interest: the same company diagnoses the problem and sells the fix. When the diagnosis is free and the revenue is in the piers, scopes drift upward. An independent structural engineer has no piers to sell. Their product is the correct answer.
The Incentive Problem, Plainly
A typical sequence: homeowner sees cracks → calls a repair company for a "free inspection" → receives a proposal for a dozen piers. Sometimes that's exactly right. But settlement symptoms have several possible causes, and more than one honest outcome:
- Normal aging: older homes settle; some out-of-level is original construction. Verdict: do nothing.
- Drainage / expansive soil: much of California sits on clay that swells and shrinks seasonally. Fixing gutters, grading, and irrigation often stabilizes movement for a fraction of pier cost. Verdict: fix the water first.
- Localized settlement: a corner or porch moving. Verdict: targeted underpinning — a few piers, not a perimeter.
- Progressive structural distress: widening cracks, doors racking seasonally worse, separation at additions. Verdict: engineered repair, properly permitted.
Reading the Symptoms
| Symptom | Often means | Urgency |
|---|---|---|
| Hairline stucco/drywall cracks | Finish movement, seasonal soil cycles | Low — monitor |
| Diagonal cracks off door/window corners | Differential movement | Medium — assess |
| Stair-step cracks in block/brick | Foundation movement | Medium-high — assess |
| Sloping floors, sticking doors, gaps at base | Settlement or framing issues | Assess — cause varies |
| Cracks widening over months; separation at addition joints | Active movement | High — engineer now |
Yes, Repairs Need Permits
Underpinning, helical or push piers, and structural foundation repairs are permitted work in California, and jurisdictions commonly want an engineer's evaluation or a stamped repair design in the submittal. A repair done without a permit creates the same resale and liability problems as any unpermitted structural work — plus, unpermitted piers can't prove they hit refusal depth or capacity. Paperwork is part of the repair.
The Sequence That Protects the Owner (and You)
- Independent assessment — site visit or photo-based review; cause, severity, and whether repair is needed at all.
- Fix water first where drainage is the driver — cheapest structural repair in existence.
- Engineered scope — if repair is warranted: locations, method, depths/capacities, permit documents.
- Competitive bids on the fixed scope — now the proposals are comparable.
- Permit, install, verify — installation records checked against the design.
For contractors: bringing the independent engineer to the table is a trust move that wins the job. You become the one who protected the client from being oversold.