Your First Tenant: A Garden Suite Landlord's Starter Guide
Becoming a first-time landlord with a new garden suite means learning Ontario's rental rules fast. A practical starter guide to leases, screening, insurance, and the LTB.
You're a Landlord Now: What Actually Changes
Building a garden suite and renting it out for the first time makes you a residential landlord under Ontario's Residential Tenancies Act, with real legal obligations that most new landlords underestimate. The Act governs the lease you use, how much notice you must give to enter the unit, how rent increases work, and what process you must follow if a tenancy ever needs to end, and it favours predictable, documented processes over informal understandings. This is not meant to be intimidating; thousands of GTA homeowners successfully rent out garden suites every year, but going in with accurate expectations, rather than assuming it works like renting a room to a friend, saves real trouble later. The suite itself needs to be a legal, permitted unit before any of this matters, since renting an unpermitted structure creates risk that no lease can paper over.
The Ontario Standard Lease, Explained
Every residential tenancy in Ontario, including a new garden suite, must use the province's standard lease form, a template the government publishes specifically to standardize terms and protect both parties. It covers the basics, rent amount, due date, deposit rules, who pays which utilities, but it also has sections for additional terms specific to your unit, parking, use of outdoor space, pet policies where applicable. Rent deposits in Ontario are capped at one month's rent and can only be applied to the last month of tenancy, not damage, which surprises landlords used to different rules elsewhere. Ontario also limits how much and how often rent can be increased for existing tenants under the province's rent guideline, though a new suite's first-ever rent is set freely by the landlord. Using the correct standard lease form from day one, filled out completely, is the single easiest way to avoid a dispute later.
Screening Tenants Legally
Screening a tenant well protects your suite, but it has to be done within Ontario's human rights rules, which prohibit discrimination based on family status, source of income, including whether rent will be paid via a housing benefit, and several other protected grounds. What you can legally do: request references from previous landlords, verify employment and income, typically looking for income around three times the monthly rent as a rough guideline, and run a credit check with the applicant's written consent. What crosses a line: asking about immigration status beyond what is needed to confirm legal right to reside in Canada, refusing an applicant with children, or setting a blanket policy against tenants using rent assistance. A consistent, documented screening process applied the same way to every applicant is both the fairest approach and the one that holds up if a decision is ever challenged.
What the Landlord and Tenant Board Actually Means for You
The Landlord and Tenant Board, Ontario's tribunal for residential tenancy disputes, is worth understanding before you need it rather than during a crisis. It handles everything from rent arrears applications to maintenance disputes to eviction proceedings, and in recent years its processing times have stretched to many months for a hearing, a reality every new landlord should factor into their risk planning rather than assume can be resolved quickly. The practical takeaway is not to fear the LTB, but to treat prevention as the real strategy: thorough screening up front, a clear lease, and prompt, documented communication when issues first appear resolve the large majority of problems long before an LTB application would ever be filed. Most garden suite landlords in the GTA never need the Board at all, and the ones who do fare much better having kept clean records from day one.
Insurance You Actually Need
New landlords often assume their existing homeowner's insurance covers a rented suite; it typically does not, and finding that out after a claim is one of the more expensive lessons a first-time landlord can learn. Once you have a tenant, you generally need a landlord policy, sometimes called rental dwelling insurance, covering the structure, liability if a tenant or their guest is injured on the property, and loss of rental income if the suite becomes uninhabitable after a covered event. It is also standard, and worth writing into the lease, to require tenants to carry their own tenant's insurance covering their belongings and their liability, since your landlord policy generally will not cover a tenant's possessions. Confirm with your insurer before the suite is tenanted, not after, since some homeowner policies technically require notification when a secondary unit is rented, and an unnotified claim can be denied.
The HST Question New Landlords Forget
One tax detail catches new landlords off guard: building a suite specifically to rent it out generally makes you a builder for HST purposes under the self-supply rule, meaning you owe HST on the suite's fair market value at the time of first tenancy, offsettable through the New Residential Rental Property Rebate, which must be filed within two years of that date or the rebate is forfeited. On a suite costing around $400,000, that rebate can exceed $24,000, so missing the filing window is a genuinely costly mistake, not a minor paperwork slip. A suite built primarily for a family member to live in, rather than to rent, generally avoids triggering self-supply in the first place. Either way, this is exactly the kind of detail to confirm with an accountant before your suite's first tenant moves in, not after.
Setting Up for a Smooth First Year
The first year as a landlord goes more smoothly when the groundwork is done before the suite is even finished. Line up your standard lease template, your screening criteria, and your landlord insurance quote while construction is still underway, so you are ready to move the moment the occupancy permit comes through rather than losing weeks of rent to administrative catch-up. Set your opening rent using real comparables in your specific area, since the $1,900 to $2,600 GTA one-bedroom range is a starting reference, not a guarantee for your street. Home Garden Suites builds the suite; the landlord decisions above are yours to make, ideally with a lawyer or accountant's input where the stakes are meaningful, but a well-built, legal, properly permitted suite is the foundation every part of this guide depends on.
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