With average home prices exceeding $700,000 nationally and $1 million+ in Toronto and Vancouver, co-buying has become a practical strategy for Canadians priced out of the market individually.
For co-buyers who are not romantic partners, tenancy in common is almost always the better choice because it allows unequal ownership, independent transfer, and estate planning flexibility.
How Co-Buying Affects Your Mortgage
Qualification
Factor
How It Works
Income
All buyers’ incomes combined
Debt ratios
All buyers’ debts combined (GDS/TDS calculated together)
Credit score
Lowest score among all applicants is used
Down payment
Combined from all buyers
Liability
Each buyer is 100% liable for the full mortgage
Example: Co-Buying Power
Buyer
Individual Income
Individual Max Mortgage
Combined Max Mortgage
Buyer A
$75,000
~$375,000
—
Buyer B
$65,000
~$325,000
—
Combined
$140,000
—
~$700,000
The Co-Ownership Agreement
A co-ownership agreement is a legally binding contract that protects all parties. Do not co-buy a home without one.
What It Should Cover
Clause
Details
Ownership percentages
Who owns what share (e.g., 60/40 based on contribution)
Financial responsibilities
Who pays what — mortgage, taxes, insurance, maintenance
Down payment tracking
Records each person’s contribution with proof
Buyout procedure
How one owner can buy out the other(s), including valuation method
Right of first refusal
The remaining owner(s) get first option to buy before an outside sale
Sale triggers
What events trigger a required sale (job loss, inability to pay, dispute)
Dispute resolution
Mediation or arbitration before court
Renovation decisions
How renovation costs and decisions are shared
Occupancy terms
Who lives there, who rents, guest policies
Exit timeline
How much notice is required before forcing a sale
Death/incapacity
What happens if an owner dies or becomes incapacitated