Ontario Renovation Contracts: What the Law Requires in Every Agreement (2026)
If you are planning a renovation in Ontario, there is one thing you should know before signing anything: **the law already dictates what must be in your contract**. Ontario's Consumer Protection Act, 2002 (CPA) and the Construction Act, R.S.O. 1990 (as amended) set out specific requirements that protect both homeowners and contractors.
Most people have no idea these rules exist. This guide explains every mandatory element, what happens when contractors skip them, and how to generate a compliant contract in minutes.
The Legal Framework
Two pieces of Ontario legislation govern renovation contracts:
Together, they create a comprehensive set of rules that most contractors and homeowners ignore at their peril.
What the CPA Requires in Every Renovation Contract
Any renovation agreement over $50 must be in writing and include specific information. Here is the complete checklist:
| Required Element | Why It Matters |
|---|---|
| Contractor's full legal name | Needed for lien searches, small claims, and WSIB verification |
| Contractor's business address | Physical address, not just a PO box |
| Contractor's phone and email | Two methods of contact minimum |
| Detailed description of work | Specific enough to measure completion |
| Itemized payment schedule | When each payment is due and for what work |
| Total cost including HST | No hidden fees after signing |
| Start and completion dates | Both must be stated explicitly |
| Warranty descriptions | What is covered, for how long, and what is excluded |
| 10-day cooling-off notice | Required if contract is signed at the homeowner's residence |
| Change order process | How scope changes are documented and priced |
Missing even one of these elements can give the homeowner grounds to void the contract.
The 10-Day Cooling-Off Period
One of the most important protections under the CPA: **if a renovation contract is signed at your home** (not at the contractor's office), you have 10 calendar days to cancel for any reason, without penalty.
During this period:
This right cannot be waived, even if the contract says otherwise.
What Happens Without a Written Contract
If a contractor performs work without a proper written contract, the CPA gives the homeowner extraordinary rights:
This is why professional contractors insist on written contracts. It protects them as much as it protects you.
The 10% Statutory Holdback
Under Ontario's Construction Act, **10% of every payment must be held back** by the homeowner for 60 days after substantial completion. This holdback protects against construction liens filed by subcontractors or material suppliers.
For a $100,000 renovation:
Failing to maintain the holdback can make you personally liable for unpaid subcontractor claims.
Prompt Payment Rules
The Construction Act's prompt payment provisions require:
These rules apply to most residential renovations and protect contractors from payment delays.
How to Create a Compliant Contract
Rather than starting from scratch, you can use RenoNext's free [Contract Generator](/contracts) to create an Ontario-compliant renovation contract. It automatically includes all CPA-mandated fields, calculates the 10% holdback, and generates a professional PDF ready for signatures.
For cost estimates to pair with your contract, check out our [Cost Guides](/costs) covering 25 trades across 15 Ontario cities.
