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Can You Dispute a Condo Special Assessment in Ontario?

See what options an Ontario owner may have when a special assessment seems unfair, including the Condominium Authority Tribunal and the Superior Court.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • Boards can levy special assessments without owner approval, so a dispute usually turns on the reason, the process or the documents.
  • A dispute over a lien can go to the Condominium Authority Tribunal if it is tied to an issue within the Tribunal's jurisdiction, while liens tied to issues outside it, such as repairs, must go to the Superior Court of Justice.
  • Not paying carries real risk, because an unpaid assessment gives the corporation a lien that can end in a sale of the unit.

If a special assessment seems unfair, too large or improperly passed, you may wonder whether you can push back. The honest answer is that it depends on why it was levied, how it was passed and what your building's documents say.

This article sets out the general starting points and the forums that may be involved. It cannot tell you whether your assessment is valid, which is something a lawyer can assess from your documents.

Start with the board's power and the reason

A condo board can levy a special assessment through common expense fees without owner approval. Reasons include unforeseen expenses, a major repair that exceeds its budget, and litigation costs. Owners must pay their share, which follows the same percentage as their common expense share.

So the fact that owners did not vote is not, on its own, a ground to object. More useful questions are whether the stated reason is genuine, whether your share was calculated correctly and whether the board followed the declaration, by-laws and rules.

Possible grounds to look at

Whether any of these applies depends on the facts, so keep the notice, the board minutes and any correspondence.

Where a dispute can go

Start by writing to the board and asking for its reasons and supporting documents. If that does not resolve it, the forum depends on the issue.

A lien tied to an issue within the Condominium Authority Tribunal's jurisdiction can be disputed at the Tribunal. Examples are nuisance (noise, smoke, odour), parking, storage, pets, records and settlement compliance. Liens tied to issues outside that jurisdiction, such as repairs, must go to the Superior Court of Justice.

Whether a challenge to a special assessment itself fits the Tribunal or belongs in court depends on the exact issue. The rules on where lien disputes are heard have also been the subject of proposed changes, so confirm the current position with a lawyer before choosing a forum.

The risk of withholding payment

An unpaid special assessment gives the corporation a lien against the unit, covering the unpaid amount, interest, and reasonable legal costs and expenses. The lien expires three months after the default unless the corporation registers a Certificate of Lien.

Before registering, the corporation gives a Notice of Lien, and if the arrears are not paid within 10 days it can register the certificate. A Notice of Sale Under Lien can follow, with a redemption date 45 days after it is issued. If you still have not paid, the corporation can sue for possession in the Superior Court of Justice and sell the unit.

You can pay everything the lien secures at any point until the unit is sold, and the corporation must then discharge it. Because costs grow along the way, get advice before deciding to hold back payment.

What to do next

Frequently asked questions

Can I dispute an assessment because owners did not vote on it?

Not on that ground alone. A board can levy a special assessment through common expense fees without owner approval. Your declaration and by-laws may still matter, so have them reviewed.

Can the Condominium Authority Tribunal hear my dispute?

A lien tied to an issue within the Tribunal's jurisdiction, such as nuisance, parking, storage, pets, records or settlement compliance, can be disputed there. Issues outside it, such as repairs, go to the Superior Court of Justice. Whether your issue fits depends on its details.

What if I bought the unit recently and the certificate did not mention assessments?

A status certificate may state special assessments levied since the current budget and why, and what it includes or leaves out binds the corporation. In one court decision the CAO describes, a buyer was exempt because the certificate had not clearly disclosed that assessments might be levied.

Can the corporation sell my unit over an unpaid assessment?

It can be the end point of the lien process. After a Notice of Sale Under Lien and the redemption period, the corporation can sue for possession and sell the unit after judgment. You can pay what the lien secures at any point until the sale.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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