Co-Buying a Multiplex With Family in BC (2026)

Buying a Vancouver multiplex with a sibling, a parent, or a close friend is more common than people realize. With prices where they are, pooling is often the only way two people can each get into a strong neighbourhood. The math works. The structure, if you skip it, doesn't. Here's how to set up a co-purchase properly.

The decision before the decision: tenants in common vs joint tenants

Two ways to hold property together in BC:

• Joint tenants — both own 100% with right of survivorship. If one dies, the other inherits automatically. Common between spouses.
• Tenants in common — each owns a defined share (50/50, 80/20, etc.). On death, your share goes through your will, not to the co-owner. Almost always the right structure for non-spouse co-buyers.

If you're buying with a friend, sibling, or parent, choose tenants in common. It keeps your estate planning clear and lets each party leave their share to whomever they want.

The co-ownership agreement — the document that matters most

A co-ownership agreement is a written contract between you and your co-buyer covering everything that could go differently than expected. The minimum it should address:

• Ownership shares — who owns what percentage of title (often matched to who put in what fraction of the down payment).
• Mortgage payment splits — how the monthly cost is divided. Often proportional to ownership.
• Living arrangement — who lives in the unit? Does one person live there and pay the other rent? What's the rent?
• Decision-making — what requires unanimous agreement vs majority? (Major repairs, new mortgages, selling.)
• Exit — what happens if one party wants out? First right of refusal? Mandatory listing? Forced buyout formula?
• Death — what happens to the deceased party's share? Does the survivor get first option to buy?
• Divorce or relationship breakdown — how does that change ownership?
• Default — what if one party stops contributing to the mortgage?

Get this drafted by a real estate or family law lawyer. Budget $1,000–$2,500 for a thorough agreement. Compared to the cost of resolving a dispute later, this is the cheapest insurance you'll buy in your life.

Independent legal advice — non-negotiable

Each party in a co-purchase needs their own lawyer. Even if you're siblings who get along perfectly, the lawyers cannot represent both of you. The standard practice is each party gets a lawyer, lawyers exchange drafts, both parties sign once both lawyers say it's fair to their client.

This isn't bureaucratic theatre. It's how you make sure you both understand what you're signing and that the terms are equitable. Skipping it is the most common reason co-purchases blow up later.

Living arrangement: the conversation people skip

If only one of you will live in the unit, you need to decide on day one:

• Is the resident party paying market rent to the non-resident? Or are they paying only the proportion of mortgage equal to their ownership share?
• What about utilities, strata fees, property tax — are these split, or does the resident cover them?
• Capital improvements (new floor, kitchen reno) — does the resident decide alone, or jointly?
• What if the resident wants to move out and rent the unit to a tenant?

In our experience, the cleanest arrangements are either: (a) both parties live in the unit (a rare scenario for multiplexes), or (b) one party lives there, paying market rent to the other on the non-resident's share. The math is more complex but the relationship survives better.

Mortgage qualifying as a co-buyer

Lenders treat co-buyers as joint borrowers — both incomes count, both debts count, both credit scores matter. The lender will run credit on both of you and use the lower score to set the rate. Both parties become equally and severally liable for the mortgage — meaning if one stops paying, the lender can pursue the other for 100% of the missed payment.

Practically, this means a co-buyer with bad credit is a problem for both of you. Talk about credit scores openly before you start house-hunting.

Tax implications worth understanding

Two big ones:

• Principal Residence Exemption — generally only one of you can claim the unit as your principal residence for capital gains purposes. The other party owes capital gains tax on their share when sold (or transferred). Plan this from day one with your accountant.
• BC First-Time PTT Exemption — if both buyers are first-time buyers and both meet the threshold, you can claim the exemption proportionally. If only one is a first-time buyer, you may get a partial exemption. Always confirm with your lawyer.

Common questions

Can I co-buy with a friend who lives in another city?

Yes, but the BC Speculation and Vacancy Tax may apply to the non-resident's share if the unit isn't their principal residence. The math becomes: is the after-tax return worth it for them? Often the answer is yes for sibling-with-sibling, less obvious for friends.

What happens if my co-buyer wants to sell before I'm ready?

This is exactly what your co-ownership agreement should address. Common structures: a 60–90 day right of first refusal for the staying party to buy out the leaver at appraised value, with a fallback to listing the unit if they can't.

Is co-buying really worth the legal complexity?

If it's the only way you can both afford to be in your preferred neighbourhood, yes. The legal cost ($2,000–$4,000 total) is small relative to the difference between owning a home together and not owning one at all. The complexity is manageable with good documentation.

What this comes down to

Co-buying a Vancouver multiplex unit with family or friends is a real strategy for getting into the market. The legal and tax structure matters more than the math. Get a proper co-ownership agreement, hire separate lawyers, talk through the living arrangement before you write an offer, and document everything in writing. The relationships will outlast the mortgage.

Pooling resources with family and want help finding the right unit? Browse our curated listings of brand-new multiplex homes across Vancouver and Burnaby on the properties page, or talk to a real person on our team who knows the buildings, the developers, and what's coming next.