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Marriage Contracts and the Matrimonial Home in Ontario

See what an Ontario marriage contract can and cannot say about the matrimonial home, including possession rights, and what it can do about property division.

Family Law5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 6, 2026
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Key takeaways
  • A marriage contract term that tries to limit a spouse's matrimonial home rights under Part II is unenforceable.
  • A marriage contract must be in writing, signed and witnessed to be enforceable.
  • A contract can still affect property division, such as excluding certain property from net family property.

Many couples sign a marriage contract to set out who keeps what. It is natural to assume the contract can also decide who gets the family home if the relationship ends. In Ontario, the matrimonial home is treated differently.

This article explains what a marriage contract can and cannot do about the home, where it still matters, and what to check if you already have one.

The basic rule on the home

Under the Family Law Act, a marriage contract term that tries to limit a spouse's rights under Part II (Matrimonial Home) is unenforceable. That covers the equal right of possession, which both spouses have whether or not their name is on title.

So even if the contract says one spouse gives up any right to live in the home, that term will not be enforced against the Part II rights.

A matrimonial home is any property in which a spouse has an interest and that is or was ordinarily occupied by the spouses as their family residence. If you have separated, this is judged at the time of separation, and a couple can have more than one matrimonial home. Owning shares in a corporation that give a right to occupy a housing unit, such as in a co-operative, counts as an interest in that unit.

If only one spouse has an interest in the home, the other spouse's right of possession is personal as against the owning spouse. Title alone does not tell the whole story, which is why it is worth reading your contract alongside the Act.

What a marriage contract can still do

A domestic contract generally prevails over the Act unless the Act provides otherwise. The restriction on matrimonial home rights is one place where the Act does provide otherwise.

A contract can still deal with other matters. For example, property the spouses agreed by domestic contract to exclude is excluded from net family property. Be careful, though. The gift and inheritance exclusion does not apply to a matrimonial home, and no date-of-marriage deduction is allowed for a property that is a matrimonial home. How these rules interact with your specific wording is worth confirming with a lawyer.

This matters if one spouse owned the home before the marriage. The family home's full value is shared even then. A gift or inheritance used to buy or pay down the family home also loses its protection. Gifts between spouses are not excluded under the gift and inheritance rule, although a court may consider them when deciding whether to vary the equal share.

Formalities and disclosure

A marriage contract, cohabitation agreement or separation agreement is unenforceable unless it is made in writing, signed by the parties and witnessed.

A court may set aside a domestic contract, such as a separation agreement, if a party failed to disclose significant assets, debts or other liabilities that existed when it was made. Full disclosure when signing protects the agreement.

Release of rights in a separation agreement

One of the situations in which a spouse may sell or mortgage a matrimonial home interest is where the other spouse released their rights in a separation agreement. A spouse's right of possession, when only the other spouse has an interest in the home, ends when they stop being spouses unless a separation agreement or court order says otherwise.

If you are a common-law couple, the Part II right of possession does not apply to you at all. A cohabitation agreement works in a different framework, so get advice about your own situation.

Selling, mortgaging and getting court help

Even with a contract in place, the Act limits what one spouse can do alone. A spouse may not sell or mortgage an interest in a matrimonial home unless the other spouse joins in or consents, the other spouse released their rights in a separation agreement, a court order authorizes it, or a different property has been designated as the matrimonial home by both spouses and that designation is registered.

There is an exception for good-faith buyers. A court cannot set aside a sale or mortgage made in breach of that rule if the buyer or lender acquired the interest for value, in good faith and without notice that the property was a matrimonial home.

What to do next

Frequently asked questions

Can our marriage contract say who gets the house if we separate?

It cannot limit Part II matrimonial home rights, because a term trying to do so is unenforceable. Other parts of the contract may still matter.

Does a contract change who owns the home?

A court can decide questions of ownership or possession between spouses. The contract does not remove the Part II protections.

What makes a marriage contract valid?

It must be in writing, signed by the parties and witnessed.

Can an old contract be challenged?

A court may set aside a domestic contract if a party failed to disclose significant assets, debts or liabilities that existed when it was made.

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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