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Defending a Partition Act Application by a Co-Owner in Ontario

Served with a Partition Act application in Ontario? Learn who it covers, how to think about defending a forced sale, and what to gather and do next.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • Section 2 of the Partition Act allows joint tenants, tenants in common and other interested parties in Ontario land to be compelled to partition or sale.
  • Being served does not mean the property will be sold automatically; the outcome depends on the facts and the evidence you put forward.
  • Your response, supporting evidence and any alternatives, such as a buyout, are most useful when prepared early with a lawyer.
  • If a sale does happen, it must still be reported to CRA, even where the gain is exempt.

If a co-owner has started a court application to force the sale of a home or other land you share, it can feel like the decision has already been made. That is not necessarily so. The application is a request to the court, and how it turns out depends on the facts.

This article explains what the Partition Act covers, how to think about a defence in practical terms, and how to prepare. Because the outcome turns on the facts of your co-ownership, treat this as a starting point for a conversation with a lawyer.

What the Partition Act allows

Section 2 of the Partition Act allows joint tenants, tenants in common and other interested parties in Ontario land to be compelled to partition or sale. In everyday terms, one co-owner can ask a court to divide the property or, more commonly with a house, to order it sold so the proceeds can be shared.

Ontario's e-Laws shows the Act's consolidation period from December 15, 2009. Because statutes and court decisions can change, have a lawyer confirm the current wording and the case law that applies to you.

Who this can affect

Type of co-ownerCovered by section 2?
Joint tenantsYes
Tenants in commonYes
Other interested parties in the landYes

Common situations include former partners who bought together, siblings who inherited a home, and relatives or friends who pooled money on a purchase. How you hold title, and what was agreed when you bought, shapes your position.

Thinking about a defence

How a court approaches a request to force a sale depends on the facts and on the current case law, so it is worth confirming with a lawyer. Which arguments succeed depends on your situation, and evidence will matter.

Points that people in your position commonly look at include the following. They are areas to discuss, not promises of how a court will rule.

Practical points for your response

Court papers come with deadlines. Look at the date you were served and any response dates on the documents, and do not let them pass while you are deciding what to do. Missing a step can leave the court hearing only one side.

Your evidence should be organized and factual. Keep your tone measured in anything you write. Messages that attack the other owner can hurt more than they help, and they may be read by a judge.

If a sale does go ahead

If the property is sold, either by agreement or by order, how the sale is carried out and how the proceeds are handled is worth discussing with a lawyer. On the electronic land registry, most transfer of title documents require two different lawyers to sign for completeness, with limited exceptions. A single lawyer may not act for both transferor and transferee, though a firm of two or more lawyers may if different lawyers represent each party.

On the tax side, CRA says all sales of real property must be reported, including a principal residence, even with no gain or a fully exempt gain. Ask an accountant how your share of any gain is treated.

What to do next

Frequently asked questions

Can a co-owner really force me to sell?

The Partition Act allows joint tenants, tenants in common and other interested parties to be compelled to partition or sale. Whether a court orders a sale in your case depends on the facts, so being served is not the same as losing the property.

Does it matter whether we are joint tenants or tenants in common?

Section 2 applies to both. The way you hold title can still affect your rights and what happens to your share, so it is worth confirming with a lawyer.

Can I buy out the other owner instead?

Often that is something to consider, since it can end the dispute without a forced sale. It requires agreement on value and enough financing, and a lawyer can help structure it.

Do I owe tax if the property is sold?

CRA says all sales of real property must be reported, even where there is no gain or the gain is exempt. Whether tax is owing depends on your circumstances, so ask an accountant.

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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