No. On a matrimonial home in Ontario, one spouse cannot sell, transfer or place a mortgage on the property without the other spouse’s agreement.
Section 21 of the Family Law Act is the provision that says so, and it applies whatever the title says. Being the only person on the deed is not an exception. Paying the whole deposit is not an exception. Having moved out is not an exception. A transaction that ignores the rule can be set aside by a court, which is why a deal signed by one spouse alone is not the shortcut it looks like.
There are four narrow routes by which a matrimonial home changes hands or gets mortgaged without both spouses signing. Your spouse consents, either by signing the document or by signing a consent to the transaction. Your spouse released those rights in a properly executed separation agreement. A court order authorizes the transaction under section 23. Or the property is not a matrimonial home at all, which turns on how the two of you used it rather than on who paid for it.
A refusal is a problem to solve rather than a permanent wall. Where both of you are on title, either co-owner can apply to the court for an order to sell under the Partition Act. Where only one of you is on title, section 23 is the route to ask a court to authorize a sale. Both of those are legal processes and they belong to your family lawyer rather than to us. What we can tell you is what the house is worth today, what it costs to run each month while the question stays open, and how long a sale realistically takes once the two of you or a court have settled it. Those numbers move more conversations than arguments do.
On our own files we deal with consent before a photographer is booked. We confirm at the first meeting who is on title and whether the home is a matrimonial home, and we confirm who signs the listing agreement. Both spouses sign it where the law requires it. Deals collapse late when somebody assumes a signature will be there and it is not, and a signature that is not coming is far better discovered in week one than after a firm offer.
The Flowers Team has handled 50 divorce-related transactions since January 2024, and in 2026, 1 in every 7 Flowers Team transactions involves a separating household (Source: Flowers Team internal records, January 2024 to September 2026). Almost every one of those files opens with a version of this question.
This is general information, not legal advice. Your family lawyer confirms how these rules apply to your situation.
Read the consent rules in full, including the four exceptions
Read how we handle a home sale during a separation
Ask for a free home evaluation