How to Hire a Concrete Contractor in Ontario
Concrete work in Ontario is highly weather-dependent — pouring concrete below 5°C causes it to freeze before curing, leading to cracking and failure. The best concrete season is May through October. Foundation work and retaining walls over 1 metre typically require a building permit under the Ontario Building Code.
Ontario Concrete Licensing Requirements
No mandatory Ontario license
Concrete work may require building permits depending on scope (foundations, retaining walls).
When to Hire a Concrete Contractor
- Your driveway has large cracks, heaving, or settling
- Your foundation has visible cracks or water is leaking in
- You want a new patio, walkway, or garage pad
- Your sidewalk is a trip hazard
- You need a retaining wall for a sloped yard
- You're building a new garage, shed, or addition (foundation required)
Timeline: Driveway replacement takes 2-4 days (including removal). Concrete patio takes 1-3 days. Foundation repair varies from 1 day (crack injection) to 1-2 weeks (full excavation).
Concrete Costs in Ontario (2026)
Prices are approximate for Ontario (CAD). Actual costs vary by city, scope, and season. Always get 3 written quotes.
Questions to Ask Before Hiring
- 1Do you carry liability insurance and WSIB?
- 2What mix strength (MPa) will you use for this application?
- 3Do you include rebar or wire mesh reinforcement?
- 4How do you handle drainage and grading?
- 5Will you pull a building permit if required?
- 6What is the minimum cure time before I can drive/walk on it?
- 7What warranty do you offer against cracking?
Red Flags — When to Walk Away
- No experience references
- No insurance
- Won't discuss drainage
- Demands full upfront payment
Homeowner Checklist — Before You Hire
- Get at least 3 written quotes for comparison
- Verify WSIB clearance certificate (protects YOU from liability)
- Check Google reviews AND ask for local references
- Confirm they will pull all required permits
- Never pay more than 10-15% deposit upfront
- Get everything in writing — scope, timeline, payment schedule
- Verify their business insurance is current
- For regulated trades (electrical, plumbing, gas), verify their license number
Payment: 10-15% deposit, progress payments tied to milestones, 10% holdback until completion. Ontario's Construction Act provides a 10% holdback right on construction projects.
Best Time to Hire a Concrete Contractor
Spring is peak booking season. Contact contractors in February for the best availability.
Summer is the busiest season. Prices are highest and wait times longest. Book early.
Fall is the sweet spot — contractors are less busy, prices drop, and you prepare for winter.
Winter is off-season for exterior work. Interior renovations get the best prices and fastest timelines.
How to Verify a Concrete Contractor in Ontario
Free online tool to verify any contractor's WSIB coverage status.
Verify contractor WSIB coverage before hiring — protects you from liability
Building code requirements for construction and renovation in Ontario
Searchable list of businesses with unresolved consumer complaints in Ontario.
Frequently Asked Questions — Hiring a Concrete in Ontario
- Do I need a licensed concrete contractor in Ontario?
- No mandatory Ontario license
- How much does concrete work cost in Ontario?
- Driveway: $4,000-$12,000 (2-car driveway). Sidewalk: $8-$18 (per square foot). Foundation Repair: $2,000-$15,000 (per project). Prices are approximate and vary by region.
- How do I verify a concrete contractor in Ontario?
- Check WSIB coverage at wsib.ca. Check Google reviews and ask for references. Always get 3 written quotes.
- How much deposit should I pay a contractor?
- 10-15% deposit, progress payments tied to milestones, 10% holdback until completion. Ontario's Construction Act provides a 10% holdback right on construction projects.
- What are the red flags when hiring a concrete contractor?
- No experience references. No insurance. Won't discuss drainage. Demands full upfront payment.
- What if I have a dispute with my contractor?
- Ontario Consumer Protection, Better Business Bureau, Small Claims Court (up to $35,000). Document everything and keep copies of all contracts and receipts.
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