How to Vet a Contractor in Ontario: The Complete 2026 Checklist
Hiring a contractor in Ontario isn't like buying a product online. You're inviting someone into your home, trusting them with tens of thousands of dollars, and depending on their expertise to modify your largest asset correctly and safely.
Get it wrong, and you're facing incomplete work, code violations, legal disputes, or dangerous conditions. Get it right, and you've found a professional partner who'll deliver quality work on time and on budget.
Step 1: Verify WSIB Clearance
The Workplace Safety and Insurance Board (WSIB) provides injury insurance for workers in Ontario. If a contractor doesn't have WSIB coverage and someone gets hurt on your property, **you could be held financially responsible** for their medical costs and lost wages.
How to Check
**Red Flag:** If a contractor claims they "don't need WSIB" or offers to "work around" requirements, walk away.
Step 2: Confirm Liability Insurance
General liability insurance protects you if the contractor damages your property or causes injury during the renovation. Minimum coverage: **$2 million**.
Verification Process
Step 3: Verify Trade Licences
Ontario doesn't have universal contractor licensing, but specific trades require licences:
| Trade | Licensing Body | How to Verify |
|---|---|---|
| Electrical | ESA (Electrical Safety Authority) | esasafe.com or 1-877-372-7233 |
| Gas Fitting | TSSA (Technical Standards & Safety Authority) | tssa.org or 1-877-682-8772 |
| HVAC (refrigerant) | TSSA | tssa.org |
| General Contractor | Municipal | Your city's licensing department |
Building Permits
For structural work, additions, or major renovations, building permits are required under the Ontario Building Code. Your contractor should:
**Warning:** If a contractor suggests skipping permits to "save money," that's a dealbreaker. Unpermitted work can make your home uninsurable, create liability during future sales, and result in forced removal plus municipal fines.
Step 4: Check References and Past Work
Don't just collect phone numbers — actually call them.
Questions to Ask References
Red Flags
Step 5: Review the Written Contract
A professional contractor will provide a detailed written contract. Essential elements:
**Scope of Work** — Detailed description including specific materials, fixtures, and finishes.
**Payment Schedule** — Clear milestones tied to work completion. Never more than 10% deposit upfront.
**Timeline** — Start date, estimated completion date, and process for handling delays.
**Warranty** — What's covered, for how long, and how claims are handled.
**Change Order Process** — How changes to the scope will be priced and approved in writing.
**Permits** — Who obtains them, who pays, and confirmation that required inspections will be completed.
Contract Red Flags
Step 6: Verify Business Legitimacy
Step 7: Check for Complaints
Where to Search:
Look for **patterns**, not individual complaints. How the contractor responds to negative reviews tells you more than the review itself.
Step 8: Trust Your Instincts
Good Signs:
Red Flags:
Ontario-Specific Considerations
Construction Act Holdback
Ontario's Construction Act gives contractors, subcontractors, and suppliers the right to place liens on your property if they're not paid. Protect yourself by retaining the statutory 10% holdback for 45–60 days after substantial completion.
Tarion Warranty
If your renovation involves building new living space (an addition), you may fall under Tarion warranty requirements. Verify whether your contractor is Tarion-registered if this applies.
The Quick-Reference Checklist
Documentation:
Due Diligence:
Project Planning:
The RenoNext Shortcut
Following this complete checklist takes 10–20 hours of research per contractor. RenoNext pre-verifies all these checkpoints for every pro on the platform:
✓ WSIB clearance verified and current
✓ Liability insurance confirmed ($2M+ coverage)
✓ Trade licences verified for specialised work
✓ Identity verification completed
✓ Business registration confirmed
✓ Work quality reviewed through past projects
When you hire through RenoNext, the vetting is already done. You can focus on finding the right fit for your project rather than spending weeks verifying credentials.
Professional contractors expect these questions and welcome the scrutiny. Anyone who's defensive about verification isn't someone you want working on your home.
