Foundation repair spans a huge cost range — from $500 for a minor crack seal to $50,000+ for full underpinning on a shifted foundation. 2026 pricing: hairline crack injection $500-$1,500, major crack structural repair $1,500-$4,500, steel push piers $1,800-$3,200 per pier (typical homes need 4-12), helical piers $2,500-$4,500 per pier, slab leveling (mudjacking or polyurethane) $500-$2,000 per sq yard.
Diagnosing severity first
Before any repair contractor, get a structural engineer's report ($400-$900). Engineers are independent — they have no financial interest in selling piers you don't need. Foundation repair contractors frequently over-diagnose because pier sales are their revenue. An engineer's report documents current movement, identifies causes (drainage, expansive soil, trees), and specifies whether repair is actually needed or whether stabilization (fixing drainage, root barriers) solves the problem.
Crack types and what each means
Hairline vertical cracks in poured foundation walls: normal concrete shrinkage, usually cosmetic, seal with epoxy injection if water is coming through. Horizontal cracks: serious structural concern from lateral earth pressure, requires engineering evaluation. Stair-step cracks in block foundation: settling movement, often requires piers. Diagonal cracks from corners: usually settling; may or may not require structural repair depending on width and active movement. Any crack that's growing over time (mark with tape and date) warrants professional evaluation.
Pier systems — steel push vs helical
Steel push piers drive directly below existing footings to load-bearing strata (usually bedrock or competent clay). Best for heavier structures where static load provides resistance. Helical piers screw into the ground — the advantage is they can be load-tested during install to verify bearing capacity, and they work better in sandy or unstable soil. Both systems run $1,800-$4,500 installed per pier; typical houses need 4-12 piers depending on settlement pattern.