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What to Write About the Matrimonial Home in a Separation Agreement

Learn how buyout, sale and exclusive possession clauses work when one spouse keeps the house, and what to settle before you sign in Ontario.

Family Law7 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • For married spouses, the full value of the family home is generally shared, even if one spouse owned it before the marriage or received it as a gift or inheritance.
  • The balancing payment between married spouses is called an equalization payment.
  • Common-law partners are not legally required to split property acquired during the relationship, so the home clause may work very differently for them.
  • A separation agreement is hard to change later, so each spouse should have their own lawyer review the home clauses before signing.

When one spouse plans to keep the house, it is tempting to treat the home as settled and move on to other issues. In reality the home is often the largest asset in the separation, and the wording of the clause decides who pays what, by when, and what happens if plans fall through.

This article walks through the three most common approaches: a buyout, a sale, and one spouse staying in the home for a period. It explains what each clause needs to say so that it is clear, workable and easier to carry out. It is general information, not advice on your own situation.

Why the home needs its own clauses

For married spouses in Ontario, property acquired during the marriage must generally be split equally when the marriage ends. The full value of the family home is shared, even if one spouse owned it before the marriage or received it as a gift or inheritance. That is different from most other gifts and inheritances, which can be excluded property.

The balancing payment is called an equalization payment. In general terms, each spouse adds up what they own at separation, less debts and excluded property, then subtracts what they owned at marriage less debts (not counting the family home). A negative result counts as zero. The spouse with the larger total pays half of the difference. Because the home counts so heavily, the buyout figure and the equalization figure are usually tied together.

If you were never married, the picture is different. Common-law partners are not legally required to split property acquired during the relationship. Each generally keeps what they bought, and a partner who contributed to the other's property may need a court order to recover that contribution. A cohabitation or separation agreement can set out property rights. If you are unmarried, the home clause should say plainly who owns what and how any contribution is dealt with.

Three common approaches compared

ApproachWhat it meansKey things the clause must say
BuyoutOne spouse keeps the home and pays the other for their shareValue of the home, how it is determined, amount and date of payment, mortgage and title changes
SaleThe home is sold and the proceeds are dividedListing steps, who chooses the agent, price decisions, who pays carrying costs, how proceeds are divided
Delayed sale or stay-in-home periodOne spouse and often the children stay for a set time, then sell or buy outStart and end dates, triggering events, who pays what in the meantime, what happens at the end

Which approach suits you depends on your finances, your children's needs and whether the keeping spouse can realistically afford the home on their own. A lawyer can help you test that before it is written into an agreement.

Buyout clauses: what to include

A buyout clause is only as good as its detail. Vague wording such as "fair market value" can lead to a second dispute. Think through each of the points below.

If the keeping spouse is also paying equalization on other assets, the agreement can set one combined figure. Make sure both the home value and the other property are described clearly enough that a reader who was not at your negotiation could follow the arithmetic.

Sale and exclusive possession clauses

Exclusive possession simply means that one spouse lives in the home and the other does not. In an agreement it is usually temporary. The clause should be specific about when it begins, when it ends and what ends it, for example a fixed date, the youngest child finishing a school year, or the occupying spouse remarrying or moving in with a new partner. Whether and how the law gives possession rights over a matrimonial home is something to confirm with a lawyer for your situation.

While one spouse stays and the home has not yet been sold or bought out, the clause should answer the everyday questions:

For a straight sale, spell out who handles the listing, how the listing price and offers are approved, what happens if the spouses disagree, how real estate and legal costs are taken from the proceeds, and how the remaining money is divided. Include a deadline so that the sale does not drift.

Making the agreement hold up

Ontario.ca says separation agreements let spouses divide property as they choose, that each spouse should have their own lawyer review the agreement, and that it is hard to change later. Changing a domestic contract means negotiating a new contract and filing it with the court using form 26B. That is a good reason to get the home clauses right the first time.

Honest financial disclosure also matters. Ontario guidance on spousal support agreements says they should be made with full, honest financial disclosure, without pressure and with an understanding of the terms, or a court can set them aside. How a misstated home value or mortgage balance would affect your own agreement depends on your situation, so it is worth confirming with a lawyer.

On formalities, Ontario.ca notes that marriage contracts and cohabitation agreements must be signed by both partners in front of a witness, who also signs. Ask your lawyer which signing and witnessing steps apply to your separation agreement.

If the agreement also includes support, it is one of five kinds of domestic contract, and the Family Responsibility Office enforces it only if it is registered: file it with the Ontario Court of Justice or the Superior Court of Justice using form 26B, then send the Family Responsibility Office the contract, the court-signed form 26B and a completed registration package. How this applies to the home clauses depends on your situation, so it is worth confirming with a lawyer.

What to do next

If you are married and thinking about going to court over an equalization payment, note the deadline: six years from separation or two years from the final divorce, whichever comes first. Do not let negotiations run so long that you lose that option.

Frequently asked questions

Can I keep the house if I inherited it or owned it before the marriage?

You can negotiate to keep it, but for married spouses the full value of the family home is generally shared even if you owned it before the marriage or received it as a gift or inheritance. Other inheritances from someone other than your spouse can be excluded property, but the family home is the exception. Expect the home's value to be part of the numbers.

Does the buyout amount have to be exactly half the home's value?

Not necessarily. Equalization is based on each spouse's overall property, debts and excluded property, not on the home alone. The buyout figure is usually worked out together with the rest of the equalization calculation.

Do common-law partners have to split the house?

Common-law partners are not legally required to split property acquired during the relationship, and each generally keeps what they bought. A partner who contributed to the other's property may need a court order to recover it, and a cohabitation or separation agreement can set out property rights. Title and contributions matter a great deal, so get advice.

What if the spouse keeping the house cannot refinance in time?

Your agreement can say what happens next, such as an extension to a fixed date, then a sale. Without a fallback clause you may need to negotiate again, and changing a domestic contract means making a new one and filing it with the court.

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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