Opinion column by the ImmoMulti Team. Facts are sourced; opinions are our own.
"Three of us pool our money and buy a nice plex together." The idea floats around every investor group. But is buying your first building with partners on the North Shore — as a partnership, in indivision or through a corporation — a brilliant shortcut to ownership, or a conflict trap that ends at a lawyer's office? As a direct buyer of multi-unit properties, we have a view on this, and it unsettles both camps.
🔥 The Opinionated Take
Our position: buying a plex with partners is an excellent idea — but only with a written agreement signed before the purchase. The partnership isn't the problem; the absence of rules is. Without a co-ownership agreement (indivision) or a shareholders' agreement signed at the notary's, you don't own a building: you own a legal time bomb. The nuance that changes everything for a North Shore investor: it isn't who you buy with that decides success, it's what you wrote down before signing.
The Leverage That Makes It Tempting
Let's be honest about why the idea appeals: with two or three people, you add up the down payments and the qualifying income. A solo first-time buyer struggles to assemble the down payment for a $750,000 triplex on the North Shore; split three ways, the step becomes manageable. Financing too: multiple co-borrowers strengthen the credit file presented to the lender. Buying with partners is, first and foremost, an access lever into the multi-unit market when you don't have the capital or income on your own.
It's exactly the logic behind strategies we've defended before, such as house hacking — living in your plex so the rents pay for it. Teaming up pushes that lever one notch further: you pool not only the risk, but also the management time and expertise. One handy partner, one accountant, a third who knows the tenants: on paper, the dream team.
Why buying with partners attracts first-time investors
- Pooled down payment: a plex becomes reachable sooner.
- A credit file strengthened by several co-borrowers.
- Shared management time and complementary skills.
- Risk spread instead of carried alone.
The Agreement: Your Only Real Insurance
Here's the fact too many partners ignore. When you buy a building with partners and sign nothing beyond the deed of sale, you automatically fall into indivision (undivided co-ownership), governed by the default rules of the Civil Code of Quebec. And those rules almost never reflect your real understanding. The law presumes, in particular, that you own in equal shares and that income is split equally — even if one of you put up 60% of the down payment. Without an agreement, your unequal contribution legally evaporates.
That's why a co-ownership agreement (or a shareholders' agreement if you buy through a corporation) drafted by a notary or lawyer isn't a luxury: it's the founding act of the partnership. It sets each person's contribution, the real split of shares and profits, who decides what day to day, financing and guarantees, and the exit rules. As Éducaloi reminds us, in the absence of such an understanding, the general rules of law apply — rarely to your advantage.
Sources: Éducaloi — What Kind of Home Should You Buy in Quebec? (presumption of equal shares in indivision) and Civil Code of Quebec, art. 1010 and following (undivided co-ownership).
A Partner's Exit Decides Everything
If you remember one thing: the exit clause is the heart of the agreement. Everything is fine as long as everything is fine. The day a partner divorces, moves away, runs short on cash or falls out with the others, it's the exit clause — or its absence — that decides whether you're handling a formality or a catastrophe.
The legal trap is precise. Article 1030 of the Civil Code provides that "no one is bound to remain in indivision": in principle, a co-owner may demand partition at any time, which can force the sale of the building. Picture it: one partner decides to leave, and has the right to trigger the sale of your plex at the worst moment in the market. Fortunately, a co-ownership agreement can postpone that right to partition for a fixed period, and instead organize an orderly buyout mechanism.
| Event | Without an agreement | With a well-drafted agreement |
|---|---|---|
| A partner wants out | Risk of a partition demand and forced sale (art. 1030 C.C.Q.) | Buyout of shares using a pre-set pricing formula |
| Death of a partner | Shares pass to the estate — you inherit unknown co-owners | Buyout clause for survivors, often funded by insurance |
| Serious dispute | Decisions deadlocked, costly court proceedings | Arbitration clause or a "shotgun" clause provided for |
| Unequal contributions | Presumption of equal shares regardless | Shares and profits split by actual contribution |
You'll find the same governance logic when choosing between doing things yourself or delegating — a debate we dug into in self-managing your plex vs hiring a property manager. Buying with partners means, above all, accepting that you'll govern with partners.
🎭 Devil's Advocate
Let's be fair to the other camp, because it has good arguments. The first: an agreement is expensive and doesn't stop a falling-out. Notary or lawyer fees, drafting costs, time spent negotiating calmly… for a modest first building, some will say it's disproportionate, and that a solid verbal understanding between people who trust each other beats a 20-page contract no one re-reads.
The second argument is stronger: even the best agreement won't protect you from a bad partner. A partner who stops paying their share of the mortgage, becomes insolvent or sabotages the management puts you in a bind, agreement or not — the bank can claim the full loan from each jointly liable co-borrower. Quebec legal firms repeat it: a poorly prepared indivision turns "buying together into a headache," and no paper replaces the choice of a good partner. The other camp's lesson is fair: the agreement manages the consequences, it doesn't pick the person for you.
The Verdict for a North Shore Owner
After weighing both camps, we land here: buying your first plex with partners is a good idea, as long as you treat the partnership like a business, not a friendship. The access lever is real and valuable in a North Shore market where a triplex's entry price discourages solo buyers. But the non-negotiable condition is the written agreement — indivision or shareholders' — signed before the purchase, with a real exit clause. Choose your partners the way you'd choose a co-founder, write the rules while everyone is calm, and have the structure validated by a notary and an accountant. Done in that order, buying with partners isn't a conflict trap: it's an accelerator.
Read also
On structuring decisions of the same kind: incorporating your plex: tax advantage or trap? and investing in a plex in the regions or in Greater Montreal.
Analyze the deal before you team upRun the real return on the plex you're eyeing with partners. →