Half of Canadian Buyers Would Share a Home: The Math Behind Multigenerational Plans
On a $1 million home in British Columbia, the Property Transfer Tax comes to $18,000, and the traditional property ladder asks you to pay some version of that bill two or three times. You pay it on the condo, again on the townhouse, and again on the detached house. Add realtor commissions, legal fees and movers at each step.
That math helps explain a 2026 RBC poll. It found 54% of prospective buyers would consider buying with family members other than a spouse, and 73% of first-time buyers want a home they can stay in rather than a starter. Families are working out that each move costs money they never get back. Buying with family changes three numbers at once: what the household qualifies for, how many times it pays to move, and how much risk each person carries. Whether the plan works depends on running all three before anyone signs.
Every move you skip is money you keep
A family that buys a long-term home once avoids the tax, commissions and legal costs of two or three later purchases. Over a decade or so, those avoided costs can add up to tens of thousands of dollars. Treat that figure as part of the case for buying the larger home now.
Interest follows the same logic. Here is an illustrative example. Two households each carry a $500,000 mortgage, for $1 million of debt. One shared property financed at $900,000 means $100,000 less borrowing that generates interest every month. The savings come from combining two down payments and buying one roof instead of two.
The lender adds up everyone's debts too
Most lenders allow incomes to be pooled on a multigenerational application, which can raise what a family can borrow by a wide margin. Families tend to overlook the other half of that rule. Every applicant's car loan, student loan and credit history goes into the same calculation.
One person with a weak credit file or a high debt load can shrink the whole household's approval, or sink it entirely. Before you shop, have each person pull their credit report and list what they owe. You'll know what the household can actually qualify for before you fall for a house that needs more.
A legal suite works on several fronts
BC's small-scale multi-unit housing legislation has limited how far many municipalities can block secondary suites in traditional single-family zones. That makes a legal, separate space for grandparents or adult children easier to permit than it was a decade ago. In the Cowichan Valley, CVRD bylaws on detached and garden suites still decide what's possible on a given lot. Read them before you write an offer.
Around Duncan, homes that are already suite-ready are often contested. Many families end up looking at properties with a shop that could be converted, or room for a garden suite. If the space will house a senior or a family member with a disability, the federal Multigenerational Home Renovation Tax Credit applies to up to $50,000 of qualifying costs. That works out to a refundable credit of up to $7,500.
Watch how the space is used. If part of the home starts to look like a strictly income-producing rental, the CRA may question the Principal Residence Exemption on that portion.
The co-ownership agreement decides how it ends
Sharing a title means sharing exposure. If one person on the mortgage faces a lawsuit or a bankruptcy, the whole property can be at risk. Selling also takes everyone's agreement. Adding children to title can make a later estate transfer simpler, but it has tax consequences you should review with an accountant first.
A written co-ownership agreement covers what happens when someone wants out, stops paying, or dies. It sets out who owns what share, how a buyout is priced, and how long the others have to arrange financing. Families that skip it are trusting that everyone will feel the same way in fifteen years.
Before you look at listings, write down three figures: the combined approval after every debt is counted, the moving costs this purchase saves you, and the price at which each person could be bought out. If the plan still works with all three on the table, it's worth pursuing.
On a $1 million home in British Columbia, the Property Transfer Tax comes to $18,000, and the traditional property ladder asks you to pay some version of that bill two or three times. You pay it on the condo, again on the townhouse, and again on the detached house. Add realtor commissions, legal fees and movers at each step.
That math helps explain a 2026 RBC poll. It found 54% of prospective buyers would consider buying with family members other than a spouse, and 73% of first-time buyers want a home they can stay in rather than a starter. Families are working out that each move costs money they never get back. Buying with family changes three numbers at once: what the household qualifies for, how many times it pays to move, and how much risk each person carries. Whether the plan works depends on running all three before anyone signs.
Every move you skip is money you keep
A family that buys a long-term home once avoids the tax, commissions and legal costs of two or three later purchases. Over a decade or so, those avoided costs can add up to tens of thousands of dollars. Treat that figure as part of the case for buying the larger home now.
Interest follows the same logic. Here is an illustrative example. Two households each carry a $500,000 mortgage, for $1 million of debt. One shared property financed at $900,000 means $100,000 less borrowing that generates interest every month. The savings come from combining two down payments and buying one roof instead of two.
The lender adds up everyone's debts too
Most lenders allow incomes to be pooled on a multigenerational application, which can raise what a family can borrow by a wide margin. Families tend to overlook the other half of that rule. Every applicant's car loan, student loan and credit history goes into the same calculation.
One person with a weak credit file or a high debt load can shrink the whole household's approval, or sink it entirely. Before you shop, have each person pull their credit report and list what they owe. You'll know what the household can actually qualify for before you fall for a house that needs more.
A legal suite works on several fronts
BC's small-scale multi-unit housing legislation has limited how far many municipalities can block secondary suites in traditional single-family zones. That makes a legal, separate space for grandparents or adult children easier to permit than it was a decade ago. In the Cowichan Valley, CVRD bylaws on detached and garden suites still decide what's possible on a given lot. Read them before you write an offer.
Around Duncan, homes that are already suite-ready are often contested. Many families end up looking at properties with a shop that could be converted, or room for a garden suite. If the space will house a senior or a family member with a disability, the federal Multigenerational Home Renovation Tax Credit applies to up to $50,000 of qualifying costs. That works out to a refundable credit of up to $7,500.
Watch how the space is used. If part of the home starts to look like a strictly income-producing rental, the CRA may question the Principal Residence Exemption on that portion.
The co-ownership agreement decides how it ends
Sharing a title means sharing exposure. If one person on the mortgage faces a lawsuit or a bankruptcy, the whole property can be at risk. Selling also takes everyone's agreement. Adding children to title can make a later estate transfer simpler, but it has tax consequences you should review with an accountant first.
A written co-ownership agreement covers what happens when someone wants out, stops paying, or dies. It sets out who owns what share, how a buyout is priced, and how long the others have to arrange financing. Families that skip it are trusting that everyone will feel the same way in fifteen years.
Before you look at listings, write down three figures: the combined approval after every debt is counted, the moving costs this purchase saves you, and the price at which each person could be bought out. If the plan still works with all three on the table, it's worth pursuing.
Sources
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