Ottawa buyers who can't afford to purchase alone are increasingly exploring co-ownership arrangements, buying a property with friends, siblings, or even acquaintances to pool down payments and income. Co-buying can work well with the right structure, and poorly without one.
Why Co-Buying Is Growing in Ottawa
With Ottawa's benchmark price around $685,000 and the minimum down payment for two buyers often split between limited savings, co-buying has become a pragmatic solution for first-time buyers who want to enter the market. Ottawa's federal worker demographic, where two friends in their late twenties might each earn $75,000 to $90,000, often makes combined income viable for a purchase that neither could qualify for alone.
The Two Legal Structures
In Ontario, co-owners take title as either Joint Tenants or Tenants in Common. Joint Tenancy includes the right of survivorship, if one owner dies, their share automatically passes to the surviving owner(s). Tenants in Common allows each owner to hold a defined percentage share and to will that share independently. For co-buyers who are not romantic partners, Tenants in Common is almost always the appropriate structure, as it allows each party to hold their proportionate share of equity.
The Co-Ownership Agreement: Non-Negotiable
Before closing, co-buyers must have a co-ownership agreement drafted by a real estate lawyer. This document addresses: the ownership percentage split (which may not be 50/50 if down payments differ), how monthly expenses are divided, what happens if one owner wants to sell and the other doesn't, the buyout mechanism and how the property is valued in a buyout, what happens if one owner can't make mortgage payments, and how major renovation or maintenance decisions are made.
Skipping this agreement is the single most common and most expensive mistake in co-ownership arrangements. Ottawa lawyers who handle these agreements typically charge $1,500 to $3,000 for a comprehensive co-ownership agreement.
Mortgage Mechanics
Both co-borrowers are typically on the mortgage, which means both credit scores and income are considered in qualification. Both parties are jointly and severally liable, each person is 100% responsible for the full mortgage if the other defaults. Lenders see co-buyer applications regularly and have standard processes for them.
Tax Considerations
In a co-ownership arrangement, each owner's principal residence exemption applies proportionally to their share of the property. If one co-owner already owns another property, the principal residence exemption becomes more complex and tax advice is required. Both the CRA website and a qualified tax accountant should be consulted before closing on a co-purchase.
Co-Buying with Family
Parent-child co-buying arrangements are also increasingly common in Ottawa. Parents with equity in their own paid-off or low-mortgage properties co-sign or co-buy with children, effectively bridging the down payment gap. These arrangements require the same legal structure, plus careful thought about estate planning implications.
When to Walk Away from a Co-Buy
Co-ownership works best when both parties have aligned timelines, compatible lifestyles, shared financial discipline, and genuine trust. If any of those elements are absent, the legal and financial fallout from a co-ownership breakdown: forced sales, buyout disputes, credit damage, can exceed the benefits of having entered the market earlier. Take the time to structure it properly or don't do it at all.
