Selling the Matrimonial Home in Ontario: What Section 21 Actually Requires

If you are separating and the home has to be sold, this is the law that decides whether a sale can close. It is worth ten minutes of your time before you sign anything.

This page is general information about a public statute, current as at 28 August 2026. It is not legal advice, and family law turns hard on individual facts. You need your own family lawyer. What follows is what I make sure every client and every co-operating agent understands before a listing goes up.

What counts as a matrimonial home

Under section 18(1), a matrimonial home is property in which a person has an interest and that is “ordinarily occupied by the person and his or her spouse as their family residence.” Where the spouses have separated, it is the property that was so occupied at the time of separation.

Three consequences people miss:

• There can be more than one. A city home and a cottage can both qualify if both were ordinarily occupied as family residences.
• Whose name is on title is irrelevant to the definition. The test is occupation, not ownership.
• Where the property is farm or business land, only “the part of the property that may reasonably be regarded as necessary to the use and enjoyment of the residence” is the matrimonial home.

Section 21: the rule that stops a sale

Section 21(1) is short and absolute: “No spouse shall dispose of or encumber an interest in a matrimonial home unless” one of four things is true:

1. the other spouse joins in the instrument or consents to the transaction;
2. the other spouse has released all rights under Part II by a separation agreement;
3. a court order has authorised the transaction or released the property; or
4. the property is not designated by both spouses as a matrimonial home, and a designation of another property by both spouses is registered and not cancelled.

“Encumber” matters as much as “dispose”. This section reaches refinancing and new mortgages, not only sales.

What happens if it is breached

Under section 21(2), a court may set the transaction aside — unless the person who acquired the interest did so “for value, in good faith and without notice” that the property was a matrimonial home, at the time of acquiring it or of agreeing to acquire it.

Read that from a buyer’s side and you can see why their lawyer will not simply take your word for it.

How it is handled in practice: the section 21(3) statement

Section 21(3) provides the mechanism. A statement by the person disposing of the property — that he or she is not a spouse; or is not separated and the property is not ordinarily occupied as a family residence; or is separated and the property was not ordinarily occupied at separation; or that another home is designated; or that the other spouse has released rights by separation agreement — is “sufficient proof”, unless the person receiving it had notice to the contrary.

That statement is what the buyer’s lawyer relies on. It is also why an inaccurate one is a serious matter rather than a formality.

Both spouses can stay, regardless of title

Section 19(1): “Both spouses have an equal right to possession of a matrimonial home.” This does not depend on who owns it.

Under section 19(2), where only one spouse has an interest in the property, the other spouse’s right of possession is personal as against that spouse and ends when they cease to be spouses — unless a separation agreement or court order says otherwise.

So the sole owner of a matrimonial home cannot simply require the other spouse to leave, and cannot sell it out from under them. Both facts surprise people, and both change what is realistic about timing a sale.

The matrimonial home is treated differently in the money too

Ontario’s equalization scheme carves the matrimonial home out of two ordinary rules, and both cut against the spouse who brought the home in.

• No date-of-marriage deduction. Section 4(1) lets a spouse deduct the value of property owned on the date of marriage — but expressly says property “other than a matrimonial home.” A home you owned before the marriage, which is a matrimonial home on the valuation date, cannot be deducted at its marriage-date value.
• No gift or inheritance exclusion. Section 4(2), paragraph 1 excludes property acquired by gift or inheritance from a third person after the marriage — again, “other than a matrimonial home.”

Section 5(1) then provides that on divorce, nullity, or separation with no reasonable prospect of resuming cohabitation, the spouse with the lesser net family property is entitled to one-half the difference.

I am not your accountant or your lawyer and I will not run your equalization. But the reason a Realtor should know these two carve-outs is simple: they are frequently why a client’s expectation of what the sale will leave them is wrong before we start.

Common-law partners: the point that is most often stated incorrectly

The Family Law Act defines “spouse” in section 1(1) as two people who are married to each other, or who entered a voidable or void marriage in good faith. Marriage only.

Part II, which contains the matrimonial home rules, has its own definition section — section 17 — and it defines only “court” and “property”. It does not extend “spouse” to unmarried partners.

The extended definition that captures unmarried cohabitants is section 29 — people who have cohabited continuously for at least three years, or who are in a relationship of some permanence and are the parents of a child. Section 29 governs Part III, which is support obligations. It does not reach Part II.

Stated precisely: common-law partners in Ontario have no section 21 consent right and no section 19 possession right under the Family Law Act, and the equalization regime does not apply to them. Whatever rights they may have arise from other areas of law, and that is a question for a family lawyer, not for me.

This gets repeated wrongly online constantly, in both directions. If you are common-law and someone has told you that you automatically have a veto over the sale, or that you automatically get half, get proper advice before you rely on it.

What this means for actually selling

In order:

1. Establish whether the property is a matrimonial home as section 18 defines it. Occupation at separation, not title.
2. Establish which of the four section 21(1) routes applies. If none does yet, the sale cannot properly close, and listing before that is arranged wastes everyone’s time and money.
3. Get both spouses’ instructions in writing on price, timing and terms before the property goes on the market. A listing where the two sides disagree about the number falls apart on the first offer.
4. Let the lawyers handle the section 21 documentation. A Realtor’s job is the marketing, the price and the process — not the consent.

Done in that order, a separation sale is an ordinary sale with more paperwork. Done out of order, it is a listing that cannot close, at the worst possible moment in someone’s life.

Frequently asked questions

Sources

• Family Law Act, R.S.O. 1990, c. F.3 — Ontario e-Laws. Section 1(1) definition of spouse; section 4(1) and 4(2) net family property and the matrimonial home carve-outs; section 5(1) equalization; section 17 Part II definitions; section 18(1) definition of matrimonial home; section 19(1) and 19(2) possession; section 21(1), 21(2) and 21(3) disposition, setting aside and the sufficient-proof statement; section 29 extended definition for Part III. The consolidation shows last amendment 2024, c. 2, Sched. 9. Accessed 28 August 2026.
• Ontario — What to know before buying a home. Confirmation that real estate salespersons, brokers and brokerages in Ontario must be registered with the Real Estate Council of Ontario. Published 14 March 2014, updated 28 July 2026. Accessed 28 August 2026.

Related reading

• Selling a home you inherited in Ontario: what has to be in place first
• What is my home worth in Toronto and the GTA?
• What adds value to your home before selling
• Condo versus freehold: the differences that matter when you sell