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Construction & Renovation:
Contractor Disputes Including Workmanship Quality Concerns, Among Other Issues
Last Updated: June 11 2026
Question: What should I do if a contractor or homeowner in Ontario claims unpaid invoices or defective workmanship and threatens Small Claims Court?
Answer: In Ontario construction or renovation disputes, act quickly to preserve evidence (contract, change orders, photos, texts, invoices), document deficiencies and remediation quotes, and respond in writing to payment or deficiency allegations to reduce escalation and support a settlement or Small Claims defence/counterclaim for issues like defective work, holdbacks, unjust enrichment, or failure to mitigate. Olson Craig Legal provides Lawyer & Paralegals support across Ontario with a practical plan to protect your cashflow and reputation, clarify your legal position, and pursue a cost-effective resolution, so call (226) 886-2001 to get started.
Common Disputes Affecting Contractors
Legal cases wherein the issue in dispute involves a property owner and a contractor are very common. In the Small Claims Court, disputes between a property owner and a contractor are an almost everyday occurrence. It is common that the allegations in construction law cases will involve a property owner alleging defective work or incomplete work and the contractor alleging failure of payment due.
Challenges
Disputes involving construction or renovation projects are often challenging due to the many legal issues that typically apply within the realm of construction law. Common issues may involve the extent of, and quality of, evidence required, such as the need sometimes for an independent witness to inspect and provide a reports as to what workmanship was done correctly and what workmanship was done incorrectly thus whether the required workmanship standards were met. Disputes involving construction or renovation projects are often additionally troublesome as contractors and property owners alike will frequently begin a lawsuit without first obtaining proper legal advice.
Furthermore, lawsuits involving construction or renovation projects commonly include legal issues that go beyond defective workmanship issues and may also include concerns such as unjust enrichment, consumer protection laws, failures to mitigate, among other concerns.
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