Construction Dispute: Lien vs Small Claims Court in Ontario

A contractor is suing you in Small Claims Court over unpaid renovation work. Or maybe they've registered a construction lien on your property. These are different legal mechanisms with different courts, different deadlines, and different consequences — and mixing them up can cost you.

When Construction Disputes Go to Small Claims Court

Ontario Small Claims Court handles claims for money or personal property up to $50,000. A contractor can sue you here for unpaid invoices, breach of contract, or damages from a failed project, as long as the amount claimed falls within the limit.

Typical Small Claims construction disputes include:

• Unpaid invoices for completed or partially completed work
• Claims for damages caused by defective workmanship
• Deposit recovery disputes
• Disputes over scope changes and extras not covered by the original agreement

The contractor files a Plaintiff's Claim (Form 7A), you have 20 days to file a Defence (Form 9A, $77 fee), and the case proceeds through a settlement conference and potentially a trial.

When It's a Construction Lien Instead

Ontario's Construction Act creates a separate mechanism: the construction lien. A lien is a legal claim against your property — registered on title — that says the contractor (or subcontractor, or supplier) is owed money for an improvement to the property.

The Construction Act has strict timelines:

• A lien must be preserved within 60 days after the applicable trigger under section 31 of the Construction Act; the trigger depends on the claimant and project milestones
• A preserved lien must be perfected within 90 days after the last day on which it could have been preserved

Lien actions don't go to Small Claims Court. They're heard in the Superior Court of Justice, regardless of the amount. The remedies are different too — a lien can encumber your property and, if enforced, may result in its sale. A Small Claims judgment can also be enforced against real property through a writ of seizure and sale of land, as well as by garnishment and seizure of personal property.

The Overlap Problem

Here's where it gets complicated. A construction lien claim and a claim for the underlying contract debt are distinct proceedings. A lien action must be brought in Superior Court; a separate money claim may fall within Small Claims Court's jurisdiction if it is within the monetary limit. A party cannot recover twice for the same loss.

As a defendant, check whether the contractor has also registered a lien on your property. You can search the land registry (Ontario's Teranet/OnLand system) using your property's PIN or legal description. If a lien exists, identify whether the plaintiff is seeking enforcement of the lien or only a money judgment. A construction lien cannot be enforced through Small Claims Court; an ordinary contract claim remains subject to the court's monetary jurisdiction.

Defending a Construction Claim in Small Claims Court

If the dispute is properly in Small Claims Court (no lien, or the lien has expired), your defence options include:

Incomplete or defective work. If the contractor didn't finish the job or the work was substandard, document the deficiencies with photographs, independent inspector reports, and quotes from other contractors to complete or repair the work.

No written contract. Many residential renovation disputes arise from verbal agreements or vague written quotes. Without a clear contract specifying the scope, price, and timeline, both parties end up arguing about what was actually agreed.

Change orders and scope creep. Contractors sometimes claim extras that were never authorized. If you didn't approve a change order in writing, you may not be liable for the additional cost.

Setoff. If the contractor's defective work caused you damage (water intrusion, electrical issues, having to hire someone else to finish), you can reduce the amount owing by the cost of remediation. If your damages exceed the contractor's claim, file a Defendant's Claim (Form 10A, $108 fee) within 20 days of filing your Defence.

When the Contractor Should Have Filed a Lien But Didn't

If the contractor missed the applicable 60-day lien preservation deadline, they lose their lien rights. They may still sue for the underlying contract debt in the court with jurisdiction, including Small Claims Court if the amount falls within its limit. This changes the enforcement landscape — a money judgment without a lien is harder to collect against a homeowner than a lien registered on title.

If you're defending against a contractor who preserved a lien but let it expire without perfecting it (starting a court action within 90 days after the last day to preserve it), the lien is discharged. The contractor may still sue for the underlying debt in the court with jurisdiction, including Small Claims Court if the amount falls within its limit.

Our Defending a Claim in Ontario Small Claims Court guide covers the evidence and preparation strategy for construction disputes alongside the full defence process.

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