Foundation repair costs range from $500 for minor crack injection to $20,000–$50,000+ for pier systems under a settling house. The repair method — crack injection, push piers, helical piers, wall anchors, or waterproofing — determines scope and cost. This calculator builds a complete foundation repair estimate based on the number of repair points and linear footage of work.
Epoxy crack injection (structural crack in poured concrete): $300–$600 per crack depending on length and depth. Polyurethane foam injection (non-structural, hydrophobic): $200–$400 per crack. Carbon fiber straps for bowing block or poured walls: $400–$800 per strap, typically installed every 4–6 feet. These repairs are relatively fast and high-margin — a 4-hour job can bill $1,500–$2,500 for a typical crack repair visit.
Push pier (steel driven to load-bearing strata): $1,200–$2,000 per pier installed. A typical house corner stabilization uses 2–4 piers. Helical pier (screwed into soil, used where push resistance is insufficient): $1,500–$2,500 per pier. Total pier system jobs on a residential home commonly run $8,000–$25,000 depending on pier count and access difficulty. Lifetime transferable warranties are standard and a strong sales differentiator.
Interior drain tile system (French drain along footing, sump pump): $5,000–$15,000 for a typical basement perimeter. Exterior waterproofing (excavate to footing, membrane, drainage board, backfill): $10,000–$25,000+ and significantly more disruptive. Interior dimple mat with sump: $3,000–$8,000. Sump pump installation (standalone): $800–$1,500. Window well drains and downspout extensions are often effective at a fraction of the cost — recommend these when appropriate before selling interior systems.
Significant structural repair (underpinning, major wall repair) often requires a structural engineer's report: $500–$1,500. Some municipalities require permits for foundation work; others do not. Engineered repair plans add credibility with homeowners and make your warranty more defensible. For pier systems, always document the lift achieved (in inches) and final elevation with photos and a written report for the homeowner's file.