How to Hire a General Contractor Contractor in Ontario
General contractors in Ontario coordinate entire renovation or construction projects — hiring and managing subcontractors, pulling permits, and ensuring Ontario Building Code compliance. For new home construction, GCs must be registered with Tarion Warranty Corporation. For renovations, verify WSIB, liability insurance, and permit compliance.
Ontario General Contractor Licensing Requirements
No single mandatory license, but must comply with OBC
General contractors should carry comprehensive liability insurance, WSIB, and pull all required permits. For new home construction, must be registered with Tarion.
When to Hire a General Contractor Contractor
- You're planning a kitchen or bathroom renovation
- You want to finish your basement
- You're building an addition or converting a garage
- Your project involves multiple trades (plumbing + electrical + framing)
- You need someone to manage permits and inspections
- You're building a new home or major structure
Timeline: Kitchen remodel takes 4-8 weeks. Bathroom remodel takes 2-4 weeks. Basement finishing takes 6-12 weeks. Home addition takes 3-6 months.
General Contractor 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 WSIB and comprehensive liability insurance?
- 2Are you registered with Tarion (if building a new home)?
- 3Will you pull all required building permits?
- 4Who are your subcontractors and are they licensed for their trades?
- 5What is your project management process (schedules, updates)?
- 6What is the payment schedule tied to milestones?
- 7What warranty do you offer on your work?
Red Flags — When to Walk Away
- No WSIB
- No liability insurance
- Won't pull permits
- Not Tarion registered for new builds
- No written contract
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 General Contractor 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 General Contractor Contractor in Ontario
Free online tool to verify any contractor's WSIB coverage status.
Verify contractor WSIB coverage before hiring — protects you from liability
New home builder licensing. Search 7,000+ licensed builders in the Ontario Builder Directory.
New home warranty. Verify builders are registered with Tarion.
Building code requirements for construction and renovation in Ontario
Searchable list of businesses with unresolved consumer complaints in Ontario.
Frequently Asked Questions — Hiring a General Contractor in Ontario
- Do I need a licensed general contractor contractor in Ontario?
- No single mandatory license, but must comply with OBC
- How much does general contractor work cost in Ontario?
- Kitchen Remodel: $15,000-$75,000 (complete). Bathroom Remodel: $8,000-$35,000 (complete). Basement Finish: $20,000-$70,000 (complete). Addition: $150-$400 (per square foot). Prices are approximate and vary by region.
- How do I verify a general contractor 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 general contractor contractor?
- No WSIB. No liability insurance. Won't pull permits. Not Tarion registered for new builds. No written contract.
- 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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