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Buying a House With a Friend or Family Member in Ontario

Thinking of buying a home with a friend or relative in Ontario? See the risks of shared title and mortgage and what a co-ownership agreement covers.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • How you hold title decides whether a co-owner's share goes to the other owners or to their estate on death.
  • Unmarried partners are not covered by the equalization rules, so written terms matter.
  • Land transfer tax is based on the value of the consideration, which can include an assumed mortgage or a benefit given.

Pooling money with a friend, sibling or parent can make a home affordable. It also ties your finances and your plans to someone else's, and the arrangement has to work when life changes: a job move, a new partner, a death or a falling out.

This article walks through the main risks of sharing title and a mortgage, and what a written co-ownership agreement should cover, especially if one person wants out.

Sharing a home means sharing risk

When several people are on title and on the mortgage, your finances are linked. How the mortgage obligation works if one owner stops paying depends on the terms of your mortgage, so ask your lender and lawyer to explain it before you sign. A missed payment by one person can become a problem for all.

Also think about what happens if one of you wants to sell, buy out the other, or cannot afford the carrying costs. These questions are far easier to answer before you buy than during a dispute.

Choose how you hold title

Co-owners hold title as joint tenants or tenants-in-common. On the death of a joint tenant, the surviving co-owners inherit the deceased's share. On the death of a tenant-in-common, the share becomes part of the deceased's estate.

For friends or relatives who contribute different amounts, tenants-in-common is often the better fit, since co-owners may agree to unequal shares. Joint tenancy suits people who want the survivor to take the whole home, but it may not match what each person wants for their own family.

Money, gifts and family sales

Family help often comes as a gift toward the down payment. CMHC lists a non-repayable financial gift from a relative among traditional down payment sources. Put in writing that it is a gift, not a loan, so nobody disputes it later.

What a co-ownership agreement should cover

If you are not married, there is no automatic set of rules dividing the home between you. Common-law partners are not required to divide property under Ontario's equalization rules and may have to go to court to recover a contribution. How the law treats friends or relatives who buy together depends on your situation, so a written agreement and advice from a lawyer are worth arranging before you buy.

A cohabitation agreement can set property terms for common-law partners. Whoever you buy with, a lawyer can draft terms that fit your arrangement.

What to do next

Signing the agreement before you close, while everyone is on good terms, is much easier than negotiating it after a disagreement.

Frequently asked questions

Should friends buy as joint tenants or tenants-in-common?

It depends on what you want to happen on death. Joint tenancy sends a deceased owner's share to the survivors, while tenants-in-common send it to the estate. Tenants-in-common can also hold unequal shares.

What if one of us wants to sell?

That is best settled in a co-ownership agreement before you buy, including how a buy-out works and how long the others have to respond. Without one, the outcome can depend on the facts, so get legal advice early.

Does my family member's gift affect land transfer tax?

How a gift toward your down payment is treated depends on the details of your deal. Land transfer tax is based on the value of the consideration, which can include any liability assumed or benefit conferred. Ask a lawyer about your deal.

Are unmarried co-owners protected like spouses?

Common-law partners are not required to divide property under the equalization rules and may need to go to court to recover a contribution. A written agreement is the practical protection.

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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