The first question every homeowner asks when a foundation crack shows up is the same: what’s this going to cost me? Honest answer: it depends on what’s actually wrong. A single hairline crack at a stem wall is a few hundred bucks. A two-story home that’s settling on hillside fill can run into the tens of thousands. Both are foundation repair, both fall under the same Yelp category, and both get the same Google search results — but they’re not remotely the same job.

Here’s what foundation repair actually costs in San Diego County in 2026, broken down by the specific repair tactic, with real price ranges.

The five common repair tactics, by price

Crack injection runs $400 to $1,200 per crack in San Diego. Structural epoxy for dry, stable cracks. Hydrophobic polyurethane for wet, leaking cracks. Single-crack visit takes 3 to 6 hours; most homes that need injection need 1 to 4 cracks done. A single-crack package falls in the low end of the range; a 3-to-4-crack package is closer to the high end.

Slab jacking with polyurethane foam runs $8 to $25 per square foot lifted. Used to fill voids and lift settled interior slabs (a single low corner of a kitchen, a sunken garage slab, a settled hallway over an old plumbing trench). Most slab jacking jobs come in at $1,500 to $4,500 total.

Helical pier underpinning runs $1,800 to $3,500 per pier installed. Most settled corners need 4 to 8 piers; full perimeter underpinning on a typical 1,800 sq ft home runs 12 to 20 piers. Total ranges $25,000 to $50,000 for full perimeter, $8,000 to $18,000 for partial corner repair. ICC-rated equipment, torque-verified install, engineer-stamped plan.

Push pier underpinning runs $2,200 to $4,000 per pier installed. Reserved for two-story homes, masonry construction, and situations where helical can’t reach engineered capacity. Refusal-driven install, deeper pier termination depths, more excavation per pier — hence the price premium.

Full house leveling with mixed underpinning + slab jacking runs $20,000 to $60,000 for a typical residential job. Not a single repair; it’s a full project: pre-survey, engineer plan, multi-day pier install, synchronized lift, post-lift survey, and cosmetic reset. Whole-house leveling on hillside lots or two-story homes can exceed $80,000.

What drives the price up or down

Number of piers. This is the biggest single driver. Soil profile, structure load, and movement extent determine pier count. The structural engineer’s stamped plan specifies the number; we bid the plan. More piers = higher price.

Pier depth. Helicals advance until torque verifies capacity; push piers until reaction pressure verifies. In San Diego County, depths range from 8 ft (decomposed granite over bedrock in inland canyons) to 35 ft+ (deep clay or alluvial fill near old creek beds). Deeper = more shaft sections, more drive time, higher cost per pier.

Access. Hillside lots, tight side yards, and limited equipment staging all add labor. A flat lot with truck access at every pier location is cheaper than a hillside backyard reachable only through the garage.

Structural complexity. Two-story homes, masonry construction, and homes with finished basements take more engineering and bigger piers. Light single-story slab-on-grade homes are simpler and cheaper per square foot.

Permit and engineering. Required for any pier install in San Diego County. Engineering runs $1,500 to $5,000 depending on scope. Permit fees vary by jurisdiction; we pull the permit and quote it as a line item, never marked up.

Concurrent work. If we’re already onsite for underpinning, adding drainage retrofit, slab jacking, or crack injection costs less than booking each separately. Most foundation repair plans bundle these because the cause and the symptom usually need to be addressed together.

What’s NOT included in most ranges

Three things often drive the final price above an initial range, and homeowners should know about them up front:

  • Cosmetic repair after lift. Drywall patching, paint, tile repair. Usually $1,500 to $5,000 in finish trades after structural work is done.
  • Plumbing leak repair when the cause was a slab leak. We coordinate with a plumber; their work is billed separately, typical range $1,500 to $4,500 for a re-route or spot repair.
  • Geotechnical soils report if the building department requires one for the permit. $1,500 to $4,500 from a licensed geotechnical engineer. Required for jobs above roughly 6 piers in most San Diego jurisdictions.

Will insurance cover it?

Usually no. Standard California homeowner’s policies exclude soil movement, settlement, and earth movement, even when the underlying cause is a plumbing leak. The exception is sudden damage from a covered peril (vehicle hits the home, water main breaks, fallen tree). Document the cause carefully — if there’s a coverable angle, your adjuster has what they need.

If it’s a plumbing-leak slab void: the leak repair itself (and sometimes the resulting water damage) may be covered. The foundation repair almost never is.

What to ask any contractor before you sign

A few questions that separate the good bids from the bad:

  • “Can I see the structural engineer’s stamped plan?” If there isn’t one, the price is a guess.
  • “What’s the per-pier price, and how many piers does the plan call for?” If they can’t give you both, the math isn’t transparent.
  • “What’s your warranty?” Real underpinning warranties run lifetime-of-structure on materials and labor, transferable on sale.
  • “Will you pull the permit?” If they say no, walk away. Unpermitted underpinning fails buyer inspections.
  • “How will you address the cause?” If the answer is “we just install piers,” you’re going to repair this house twice.

Free inspection, written quote, no pressure

Every foundation repair quote we give starts with a free onsite inspection. Level survey, crack mapping, photo documentation, verbal estimate. If you want a written report you can submit to a buyer, seller, lender, or insurance carrier, that’s a paid inspection ($450 and up) and includes the full level survey and photo-annotated report.

Either way, you get the price before any work starts. No hourly billing, no surprise change orders.