Want to Sue Your Contractor in Ontario? Here’s How to Start.

If a home renovation has gone sideways, Ontario’s Small Claims Court may let you sue your contractor without hiring a lawyer. Here is when it makes sense to sue, where to file, and what evidence to bring.

Illustration of Nimbus the dog inspecting a contractor's unfinished home renovation in Ontario

Hi, I’m Nimbus, Courtready’s very fluffy intern and part-time renovation critic.

If your home project has gone sideways and you’re wondering whether you can sue your contractor, here is a clear, simple guide to getting started in Ontario.

When Would You Sue a Contractor?

Here are some common situations:

  • Unfinished work. You paid for a full bathroom renovation. The contractor disappeared after tearing everything out and installing half a shower and a pile of dust.
  • Bad work. Your new kitchen cabinets are crooked, the drawers won’t close, and the “premium” countertop is already cracking.
  • Damage to your home. The contractor’s work caused a leak that damaged your floors, or they broke something valuable and refuse to fix it.

In each of these, you might be looking to sue for the money it will take to fix things, or to get some of your payment back.

Issue (examples) When can you sue?
Unfinished work After giving reasonable time to return and complete the work.
Bad work When the work is unsafe, incomplete, or below the agreed standard.
Damage As soon as the damage occurs.
Paid but did not start the job After giving reasonable time to return and start the work.

Is Ontario’s Small Claims Court the Right Place?

If the amount you are claiming is $50,000 or less, Ontario’s Small Claims Court may be the right place to sue your contractor.

$50,000 The most you can claim in Ontario’s Small Claims Court. At or below this amount, it may be the right place to bring your case.

Ontario’s Small Claims Court is:

  • Designed for everyday people. You don’t need a law degree to start a claim.
  • More efficient than higher courts. The forms and steps are more straightforward.
  • Flexible about representation. You don’t need a lawyer or paralegal, but you are allowed to hire one if you want help.

Whatever the issue, your case is only as strong as your evidence. Here is what to gather:

Issue (examples) Evidence (if applicable)
Unfinished work Agreement, payment records, communications, photos, videos.
Bad work All of the above, plus an expert report if possible.
Damage All of the above.
Paid but did not start the job Agreement, payment records, communications.

Want a Step-by-Step Guide?

If you’re thinking, “Nimbus, this still sounds stressful,” you’re not wrong.

That’s why we built Courtready Academy, so we can walk you through Ontario’s Small Claims Court step by step in a video series of eight sessions:

  1. Introduction to Ontario’s Small Claims Court
  2. Preparing your case
  3. Starting your lawsuit
  4. Serving the other party
  5. Defence and defendant’s claim
  6. Default proceedings
  7. Settlement conference
  8. Pre-trial considerations

You’ll also get six template documents based on a hypothetical dispute about a failed roof repair. The cost is just $39.96.

If you want to learn how the process works in plain language (with fewer hairballs), Courtready Academy walks you through all of it.

You don’t need a law degree to hold a contractor accountable.

Good to Know

This guide is general legal information, not legal advice, and every dispute is different. For more free tools used by legal professionals and self-represented people across Ontario, visit courtready.ca.