Buying a home with friends is one of the most practical strategies for entering an expensive housing market — but it comes with legal, financial, and relationship complexities that most buyers do not think about until it is too late. This guide covers everything you need to know.
Why co-buying is becoming common
| Factor | Impact |
|---|---|
| Unaffordable single-buyer market | Average home prices in Toronto and Vancouver require $150,000–$250,000+ household income |
| Combined buying power | Two incomes of $75,000 qualify for roughly double what one income can |
| Shared costs | Mortgage, property taxes, insurance, utilities, and maintenance split 2+ ways |
| Building equity together | Both owners build equity instead of paying rent |
Legal structures for co-ownership
Joint tenancy
| Feature | Detail |
|---|---|
| Ownership split | Equal shares only (50/50, 33/33/33, etc.) |
| Survivorship | If one owner dies, their share automatically transfers to the other(s) |
| Sale | All owners must agree to sell the entire property |
| Best for | Equal partners who want simplicity |
Tenancy in common
| Feature | Detail |
|---|---|
| Ownership split | Can be unequal (e.g., 60/40, 70/30) |
| Survivorship | No automatic transfer — deceased owner’s share goes to their estate/heirs |
| Sale | Each owner can sell their share independently (though finding a buyer for a partial share is difficult) |
| Best for | Unequal contributions, investors, or situations where you want your share to go to your estate |
Recommendation: Most co-buying arrangements between friends should use tenancy in common because contributions are often unequal and you want the flexibility to specify what happens to your share.
How mortgage qualification works
| Factor | How Lenders Handle Co-Buyers |
|---|---|
| Income | Combined gross income of all applicants |
| Debt | Combined debts of all applicants |
| Credit | All applicants’ credit scores reviewed — weakest score may affect rate offered |
| Liability | Joint and several — each person is liable for the full mortgage amount |
| Down payment | Can come from any combination of the applicants |
Example: two friends buying together
| Friend A | Friend B | Combined | |
|---|---|---|---|
| Income | $75,000 | $85,000 | $160,000 |
| Monthly debts | $300 | $200 | $500 |
| Credit score | 720 | 680 | Lender uses lower: 680 |
| Down payment contribution | $40,000 | $60,000 | $100,000 |
| Max home price (approximate) | — | — | ~$725,000 |
The co-ownership agreement (essential)
This is the single most important document in a co-buying arrangement. A real estate lawyer should draft it before you make an offer.
What it must cover
| Clause | Why It Matters |
|---|---|
| Ownership percentages | Who owns what share — especially if down payment contributions are unequal |
| Monthly cost splitting | How you divide mortgage, taxes, insurance, utilities, maintenance |
| Major expense decisions | What requires unanimous approval (e.g., renovations over $5,000) |
| Right of first refusal | If one owner wants to sell, the other gets first option to buy their share |
| Valuation method | How the property is valued for a buyout (independent appraisal, average of two appraisals, etc.) |
| Exit timeline | How much notice is required and how long the buyout process takes (typically 90–180 days) |
| Default provisions | What happens if one owner stops paying their share |
| Dispute resolution | Mediation before litigation — saves money and relationships |
| Death or incapacity | What happens to a deceased owner’s share (estate rights vs. surviving owner’s rights) |
| Relationship changes | What happens if one co-owner gets married, has kids, or wants to move a partner in |
Cost of a co-ownership agreement
| Service | Typical Cost |
|---|---|
| Lawyer drafting co-ownership agreement | $1,500–$3,500 |
| Incorporating a buyout clause and valuation methodology | Included in above |
| Title registration (tenants in common with specified shares) | $200–$500 additional |
Do not skip this step. The legal fee is trivial compared to the cost of a dispute. Friendships that survive co-ownership have a clear, written agreement from day one.
Financial considerations
How to handle unequal contributions
| Scenario | How to Structure It |
|---|---|
| Equal down payment, equal income | 50/50 ownership, split everything equally |
| Unequal down payment (60/40) | Ownership at 60/40 or equal ownership with a promissory note for the difference |
| Equal down payment, unequal income | Consider a proportional split based on income contribution, or equal ownership with a side agreement |
| One person does most renovations (sweat equity) | Assign a dollar value to the work and adjust ownership percentages periodically |
Tax implications
| Tax Issue | Detail |
|---|---|
| Principal residence exemption | Each co-owner can claim the PRE on their share if they live in the home — you cannot designate another property |
| Rental income (if one moves out) | If one owner moves out and the other pays “rent,” this may create taxable rental income |
| Capital gains on sale | Each owner reports their proportional share of any capital gain |
| Attribution rules | If ownership splits differ from economic contributions, CRA attribution rules may apply |
What can go wrong (and how to prevent it)
| Risk | Prevention |
|---|---|
| One person stops paying | Default clause in co-ownership agreement with cure period and buyout option |
| One person wants to sell, other does not | Right of first refusal clause with defined timeline and valuation method |
| Disagreement about renovations or maintenance | Major expense threshold requiring mutual written agreement |
| One person moves a partner in | Clause addressing additional occupants and how it affects costs |
| One person’s credit deteriorates | Does not directly affect the mortgage in place, but prevents future refinancing — address in agreement |
| One person loses their job | Emergency provision: temporary payment adjustment with catch-up schedule |
| Friendship deteriorates | Mediation-first dispute resolution clause avoids costly litigation |
Step-by-step: how to co-buy a home
| Step | Action |
|---|---|
| 1 | Have an honest financial conversation: incomes, debts, credit scores, savings, risk tolerance |
| 2 | Agree on budget, location, property type, and ownership structure |
| 3 | Hire a real estate lawyer to draft the co-ownership agreement |
| 4 | Get pre-approved for a mortgage together |
| 5 | Search for properties and make an offer |
| 6 | Register title as tenants in common with specified shares |
| 7 | Set up a joint account for housing costs (mortgage, taxes, insurance) |
| 8 | Review the agreement annually and update if circumstances change |
Alternatives to full co-ownership
| Alternative | How It Works | Best For |
|---|---|---|
| One person buys, other pays rent | Owner on title, friend as tenant | Unequal financial positions; simpler structure |
| Parent co-signs but does not live there | Parent helps with qualification but has no ownership | First-time buyers who need income support |
| Shared equity with a company | Programs like Key or Ourboro provide down payment in exchange for equity share | Buyers who want to own solo but need help with down payment |