Foundation crack repair cost
Every figure comes from a named source, with its year. When sources disagree, we show them all. Real prices depend on your house: these are benchmarks to spot an unusual quote, not quotes.
The minimum to expect
| Single injection (1 crack) | 400-$900 $ per crack | Fissure Expert (aucun numéro RBQ sur la page) · price list published by a company |
| Crack repair | $450 to $900 per crack | Solution ProFissure (RBQ 5770-6285-01) · price list published by a company |
Ranges
| Polyurethane injection | 400-$900 $ per crack | Fissure Expert (aucun numéro RBQ sur la page) · price list published by a company |
| Epoxy injection | 300-$1,000 $ per crack | Fissure Expert (aucun numéro RBQ sur la page) · price list published by a company |
| Several cracks and cold joints | 800-$3,000 | Fissure Expert (aucun numéro RBQ sur la page) · price list published by a company |
| Interior injection | $500 to $1,500 (also: $400 and $1,000) per crack | Soumission Rénovation (plateforme de soumissions) · quote platform — has an interest in generating requests |
| Exterior repair with excavation | $3,000 to $5,000 per crack | Soumission Rénovation (plateforme de soumissions) · quote platform — has an interest in generating requests |
| RénoPlex subsidy (Montréal): repair a crack | $370 per crack | Ville de Montréal · official source |
What moves the price
- Stable or not: if the foundation moves, only an exterior membrane will seal it (excavation, licence 2.5; sealing, licence 7). — CAA-Québec
- Interior injection is often cheaper but only lasts if the concrete is good; interior finish sometimes has to come off. — CAA-Québec
- Inference: a single crack (370 $) is far below RénoPlex's 3 000 $ minimum in Bloc 1.
Who does this work near you
Or choose: South Shore (167) · Montreal (84) · Laval (55) · Mirabel (63) · Terrebonne (56) · Saint-Jean-sur-Richelieu (45) · all cities →
Sources
- Injection de fissures de fondation (Fissure Expert (aucun numéro RBQ sur la page)), 2026-04-13 (modifié) — price list published by a company — fissure-expert.com/injection-fissures-fondation/
- Prix d'un drain français au Québec — Guide des coûts 2026 (Solution ProFissure (RBQ 5770-6285-01)), 2026-07-06 — price list published by a company — www.solutionprofissure.com/post/prix-drain-francais/
- Prix réparation fissure fondation Québec (Soumission Rénovation (plateforme de soumissions)), 2026-05-08 (modifié) — quote platform — has an interest in generating requests — soumissionrenovation.ca/fr/blogue/quel-est-le-prix-dune-reparation-de…
- RénoPlex : déterminer les montants accordés par type de travaux (Ville de Montréal), 2026-08-18 (mis à jour) — official source — montreal.ca/articles/renoplex-determiner-les-montants-accordes-par-ty…
- Réparer un drain résidentiel ou une fondation (CAA-Québec), 2016-01-04 — trade association — www.caaquebec.com/fr/conseils/entretenir-une-residence/guides/drain-e…