$3,770
Total monthly principal & interest
The full payment on the property, before taxes, insurance, utilities and fees.
Yovan Gabric, REALTOR®Royal LePage Pinnacle, Brokerage
Co-ownership is how a lot of first homes are going to get bought in Halton and Peel. Here is what it actually costs, what income you actually need, and the three risks nobody puts in the brochure.
Plenty of young adults can comfortably handle a monthly housing payment. What stops them is the down payment and the income needed to qualify on their own. Two compatible buyers, pooling both, can clear a bar that neither clears alone.
The concept is straightforward. Two responsible buyers — sometimes with a gift from family — combine their down-payment funds and their borrowing capacity, buy a three or four bedroom townhouse together, split the carrying costs, and start building equity years earlier than either would have managed separately.
It is not a new idea, and it is not a workaround. It is a structured legal arrangement with its own paperwork, its own risks, and its own exit plan. Done properly, it works. Done on a handshake between friends, it is one of the more expensive mistakes available in real estate.
The goal is not to “split a house.” It is to create a documented co-ownership in which each buyer's percentage, contribution, obligations, exit rights and dispute process are written down and agreed before anyone makes an offer. Everything on this page follows from that.
A $700,000 townhouse, split two ways. These are illustrative figures, not a quote — but the structure of the calculation is exact.
| Line | Amount |
|---|---|
| Purchase price | $700,000 |
| 5% of the first $500,000 | $25,000 |
| 10% of the remaining $200,000 | $20,000 |
| Minimum down payment | $45,000 |
| Split 50/50 | $22,500 each |
| Mortgage before insurance | $655,000 |
| Mortgage default insurance premium at 4.00% | $26,200 |
| Financed mortgage | $681,200 |
A common misconception is that 5% down on a $700,000 home is $35,000. It is not. Above $500,000 the minimum steps up to 10% on the portion above that line, so the real floor is $45,000 — about $22,500 each on an even split.
At an illustrative 4.50% over a 25-year amortization:
Every insured mortgage in Canada is stress-tested at the higher of your contract rate plus two percent, or 5.25%. At a 4.50% contract rate that means the lender assesses you as though the payment were $4,563 a month, not $3,770 — a difference of about $790 every month in qualifying terms.
Once property taxes and heat are added, the two buyers together need roughly $155,000 in combined gross income to satisfy standard debt-service ratios on this purchase. That single number defines who a realistic partner is, and it is the reason to speak to a mortgage professional before looking at a single listing.
A legal secondary suite can cut the payment substantially. It is also the assumption most likely to fall apart — and it depends almost entirely on one thing most buyers never check.
If the townhouse has a legal, permitted secondary suite renting at roughly $1,500 a month, the arithmetic changes considerably:
| Line | Monthly |
|---|---|
| Mortgage principal & interest | $3,770 |
| Illustrative gross suite rent | − $1,500 |
| Remaining after gross rent | $2,270 |
| Each, on a 50/50 split | $1,135 |
A freehold townhouse can often accommodate a legal second unit, subject to municipal zoning and the Building and Fire Codes — ceiling height, egress windows, fire separation, and parking.
A condominium or POTL townhouse usually cannot. The condominium declaration typically prohibits a second dwelling unit outright, regardless of what the zoning bylaw permits. If the search is aimed at condo townhouses, the rental income should be assumed to be zero — and much of the affordability argument goes with it.
Which is why this page treats suite income as an upside, not a premise. Qualify on the payment without the rent. If a legal suite turns out to be possible, it is a bonus that accelerates the plan. If it is treated as a requirement, a single zoning answer can collapse the whole purchase.
Property taxes, home insurance, utilities, maintenance, a repair reserve, condominium or POTL fees where applicable, plus the costs and vacancies that come with being a landlord, all sit on top of that figure. Anyone presenting $1,135 as the monthly cost of home ownership is not showing you the whole picture.
Co-buying works. It also fails in specific, predictable ways, and every one of them is manageable if it is understood before the offer rather than after.
This is the one that surprises people, and it is the most important sentence on this page. You are not each responsible for half the mortgage. You are each responsible for all of it. If your co-owner loses their job, moves away, or simply stops paying, the lender does not pursue them for their half — it pursues whoever can pay. That is you, for the entire amount.
The full mortgage — not your half — appears on both credit files. When either of you later applies for a car loan, a business loan, or your own next home, lenders will count the entire $681,200 against you. In practice this means neither buyer can easily purchase again until the co-ownership is unwound. That is a real constraint on a 30-year-old's next decade, and it deserves to be a conscious decision rather than a discovery.
A partner moves in. A job relocates. A relationship ends. Someone wants out in year three of a plan that assumed five. None of these are unusual, and none are catastrophic if the co-ownership agreement already says what happens. Without one, the only remaining mechanism is a forced sale or a lawsuit.
Independent legal advice for each buyer, and a written co-ownership agreement signed before the offer becomes firm. Not the same lawyer for both — independent advice, because the two buyers' interests genuinely can diverge. This is a few hundred dollars against a $700,000 joint liability, and it is not the place to economise.
Two categories. The money rules everyone thinks about, and the exit rules almost nobody does — which is precisely why the exit rules are the ones that end up mattering.
Parents contributing to a down payment should also decide, in writing, whether the money is a gift or a loan. Lenders require gifted funds to be documented as non-repayable, and families are often surprised to learn that an informal “we'll sort it out later” can complicate both the mortgage approval and the eventual sale.
Co-buying works far better when the home is chosen for it. Two owners sharing a house have requirements a single buyer does not.
I am also a licensed general contractor with more than 25 years in construction and renovation. On a co-buying purchase that matters more than usual, because the difference between a basement that can become a legal suite and one that cannot is a question of ceiling height, egress, and fire separation — assessed on site, during the showing, before the offer. I can give you that answer and a real cost to go with it, rather than a hopeful assumption.
In this order. The sequence is deliberate — most co-buying arrangements that fail did the steps out of order.
Whether you are a parent trying to help your son or daughter into their first home, or a young professional who would consider buying with the right partner, the useful next step is a conversation — not a commitment.
I will walk you through a realistic version of the numbers for your situation, the kind of property that suits this structure, and the professionals who need to be involved before anyone signs anything. There is no obligation, and if co-buying turns out to be wrong for you, I will tell you that plainly.
Royal LePage Pinnacle Real Estate, Brokerage
Licensed general contractor · 25+ years in construction and renovation
Serving Oakville, Milton, Burlington, Mississauga, Hamilton and Etobicoke
416 953 9545 · yovan@royallepage.ca · yovan-gabric.ca