What foundation repair costs in Miami-Dade

Structural repair prices look opaque from the outside because they are built from quantities rather than from a rate card. Two houses on the same street with identical-looking cracks can be a $900 job and a $28,000 job, and the difference is not the contractor. It is how many piers the engineer specified and how far down competent bearing sits. What follows is the shape of the market in Miami-Dade, so you can tell which conversation you are in.

Crack repair: $500 to $3,000

A single crack injected with epoxy in a stem wall or slab, including surface preparation and finish, commonly runs $500 to $1,200. Several cracks on one wall, $1,500 to $3,000. Adding carbon fiber reinforcement across a block wall, where an engineer calls for it, adds roughly $400 to $900 per strip.

The thing that changes this number is not the injection, it is the assessment. If crack monitoring shows the wall is still moving, injection is the wrong scope and the conversation moves to underpinning, an order of magnitude up. Which is exactly why 30 to 90 days of readings is a good investment. Details in the crack repair scope.

Slab leveling: $1,400 to $6,500

A section of driveway or a walkway with a stepped joint is often $1,400 to $2,500. A full pool deck or a large patio runs $3,500 to $6,500. Interior slab lifting costs more per square foot because ports have to be cored through finished flooring and patched afterward, so budget $1,200 to $4,500 on top for that access and reinstatement.

Polyurethane foam costs more per hole than cementitious grout but uses fewer holes and adds a fraction of the weight, which matters when the reason the slab dropped was weak support in the first place. The comparison is in slab lifting methods compared.

Spalling and concrete restoration: priced by quantity

Concrete restoration is quoted by the amount of material removed and rebuilt, not by the job. Localized residential repairs commonly run $60 to $180 per square foot of removal and rebuild, with a mobilization minimum that makes very small repairs uneconomic on their own. A single balcony edge might be $2,500 to $8,000. Building-wide restoration driven by a recertification report runs into six figures on larger structures.

Expect the quantity to grow after demolition starts, because sounding finds delaminated concrete that visual inspection could not. A well-written contract prices the additional square footage at an agreed unit rate rather than reopening the whole number. Budget a contingency from the outset; on restoration work that is normal practice, not pessimism.

Underpinning: $9,000 to $35,000

Piers are priced individually, roughly $1,300 to $2,600 installed depending on type and depth, and a typical single-family job needs somewhere between six and eighteen of them. A corner that has dropped might be six piers and $10,000 to $16,000. A long wall with multiple cracks plus an interior slab area can pass $30,000.

Four things move this number in Miami specifically: how deep competent bearing sits, which on the ridge can be very shallow and west of it can be well down; whether access allows a machine to reach each location; whether any of the work is inside the house; and what has to be put back afterward. Full scope detail is on the settlement repair page.

Seawall work: priced by the linear foot

Grouting and joint sealing on an otherwise sound wall commonly runs $150 to $400 per linear foot. Cap replacement, $300 to $700 per linear foot. Tiebacks add cost per anchor, typically spaced every six to ten feet. Full replacement is the expensive end, generally $900 to $2,200 per linear foot in Miami-Dade depending on wall height, water depth, and access.

Where equipment cannot reach by land, barge or crane mobilization is a substantial separate line. And the permitting is the schedule driver rather than the construction, since seawall work needs a county environmental permit alongside the building permit. See the seawall guide.

The costs that are not the repair

• Engineering, $1,500 to $4,000. Report, analysis, and sealed drawings for the permit submittal. Comes first, because nothing can be priced accurately without it.
• Subsurface investigation. A boring log or test pits, sometimes inside the engineering fee and sometimes separate. On a piering job it is what makes the pier schedule defensible.
• Permit fees. In unincorporated Miami-Dade the published schedule sets a $147.00 minimum building permit fee, and charges alterations or repairs to a single-family residence or duplex at $0.070 per $1.00 of estimated cost, minimum $25.88, maximum $847.95, under Implementing Order 4-63 effective 30 June 2025. Additional inspections beyond the initial one and one follow-up are $92.48. Starting work before the permit is issued doubles the fee. Municipalities set their own schedules.
• Restoration. Concrete, pavers, stucco, tile, and planting put back at every work location. Commonly $800 to $3,500 on a residential job.
• Occupied building phasing. On multifamily work, staging, protection, and maintaining access around residents. $1,500 to $8,000 and up depending on the building.

What a quote should tell you

• The method, and why that method rather than another.
• Quantities: how many piers, at what spacing, to what depth or torque criterion, or how many square feet of concrete removal.
• What the quantities are based on: the elevation survey, the boring log, the sounding survey, the engineer's schedule.
• A unit rate for quantities beyond the estimate, so an overrun is arithmetic rather than a renegotiation.
• Who carries the engineering, the permit, and the inspections.
• What gets put back, and to what standard.
• A payment schedule tied to milestones rather than to dates.

To size your own situation quickly, the cost estimator takes a scope and an extent and returns the band, including the extras above.

Get a free quote

Call (786) 841-1091 or send the quote form. Describing what you are seeing costs nothing, and so does the written quote that follows.