Half the calls UrbanLease takes are from people who never planned to be landlords. Job transfer to Vancouver, marriage merging two houses, a slow Calgary market in 2020, circumstances made the rental happen. The good news: a former primary residence often makes a great rental, since the owner knows it intimately. The bad news: there are six or seven decisions in the first 60 days that can quietly cost $10k–$30k if done wrong.
The math: should you really rent it out?
A 5-year hold comparison: estimated monthly rent − mortgage − property tax − insurance − vacancy allowance − maintenance reserve − management = monthly cash flow. Add principal paydown and reasonable appreciation. Compare against: sale price − selling costs − tax − reinvestment return. If the rental math is within 1% per year of the sell-and-invest math, the qualitative factors (your time, stress tolerance, distance) decide it.
The mortgage and insurance trap
A standard owner-occupied mortgage is not designed for rentals. Most lenders will allow the conversion but require notice; some require a rate switch. Standard homeowner insurance will deny claims for tenant-caused damage or tenant liability. Both issues are easy to fix, and easy to forget. The first time most accidental landlords find out is when a claim is denied.
The CRA deemed-disposition rule
When your principal residence becomes a rental, the CRA treats it as if you sold it to yourself at fair market value on the conversion date. Any gain up to that point is sheltered by the principal-residence exemption; gain after that is taxable on actual sale. You can file a section 45(2) election to defer recognition of the change of use for up to four years, which can preserve the exemption longer in specific situations. This is a conversation for an accountant, not a DIY filing.
Setting the rent on a former home
Owners systematically overprice former homes because they value the upgrades and the memories. The market does not. Strip emotion: pull comparables for the same neighbourhood, bed count, parking, and condition. Aim for the 50th percentile. A unit priced 5% too high sits twice as long.
What surprises accidental landlords most
Two things. First, how much time tenants need, even good ones email about minor things, ask for renewals, want repair updates. Second, how strictly Alberta enforces the RTA documentation rules. Missed move-in inspection, verbal rent increase, no signed lease, none of these felt like a big deal when the house was yours, but they break the rules and break the deposit at move-out.