Lease Agreements in Ontario: Key Terms to Understand Before You Sign

A lease is a contract that gives one party — the tenant — the right to occupy and use a property owned by another party — the landlord — for a defined period, in exchange for rent. Like any contract, it’s built on the same basic elements: an offer, acceptance, consideration (the rent), and terms specific enough for both sides to know what’s expected of them.

What makes leases distinct from many other contracts is the layer of legislation that often sits on top of the private agreement. In Ontario, most residential tenancies are governed by the Residential Tenancies Act, which sets out baseline rights and obligations that apply regardless of what the lease itself says — meaning a lease can give tenants more protection than the statute requires, but generally can’t take away rights the statute guarantees. Commercial leases work differently, and are covered in depth in our separate commercial lease insights hub.

Whether a lease is written or verbal, its core function is the same: to set out clearly who is responsible for what, for how long, and at what cost. The more specific and clear that written record is, the less room there is for disagreement later about what was actually promised.

Even where a landlord uses a standard-form lease template, it’s worth remembering that “standard” doesn’t mean “unchangeable.” Terms can often be discussed and adjusted before signing, particularly around move-in dates, minor repairs promised before occupancy, or specific conditions either side wants documented. Once signed, a lease is generally treated as the final word on what was agreed, which is exactly why the negotiation window before signing is worth taking seriously.

It’s also worth understanding, at a basic level, what type of tenancy you’re entering into. A fixed-term lease runs for a set period and generally can’t be ended early by either side without agreement or a recognized legal ground. A month-to-month tenancy continues indefinitely until properly ended by either party with the required notice. A lease can also cover a room in a shared house, a basement apartment, or a purpose-built rental building — and while the core legal framework is often similar, some details (like which specific rules apply to owner-occupied or shared accommodations) can differ in important ways.

Most leases specify a term — a fixed period such as one year — after which the tenancy either ends, converts to a month-to-month arrangement, or renews under new terms, depending on what the lease and applicable law provide. Understanding what happens automatically at the end of the fixed term, versus what requires a new agreement or active notice from either party, is one of the most important things to clarify before signing.

Some leases include a right to renew on specific terms, while others simply lapse into a periodic tenancy once the fixed term ends. It’s worth checking whether the lease requires you to give notice if you don’t intend to renew, since some agreements treat silence as an agreement to continue on the same terms, which can create an unwelcome surprise if you assumed the lease would simply expire.

The lease should clearly state the rent amount, the due date, accepted payment methods, and what happens if a payment is late — including any late fee, which needs to comply with applicable rules rather than being an arbitrary penalty. For residential tenancies, Ontario law places specific limits on deposits: landlords can generally collect a rent deposit (commonly equal to one month’s rent, or one rental period’s worth) but are generally not permitted to collect a separate damage deposit on top of it.

Rent increases for many residential tenancies are also subject to provincial rules, including a required notice period and, in many cases, a maximum allowable increase under the province’s annual guideline, with certain exemptions depending on the type and age of the building. Reviewing how the lease addresses future increases — and confirming what rules actually apply to your specific tenancy — helps avoid confusion well before a renewal date arrives.

Some leases also try to pass on additional charges beyond base rent — utilities, parking, or administrative fees, for example. Whether these charges are permitted, and how they must be disclosed, depends on the type of tenancy and how the charge is structured. A fee that isn’t clearly disclosed and agreed to before the tenancy begins is more likely to be challenged than one that was transparent from the outset, which is one more reason a careful read of the full lease — not just the headline rent figure — matters before signing. Ask for an itemized breakdown of every recurring charge if the lease doesn’t already provide one, so there are no surprises on your first few rent payments.

Leases typically divide responsibility for the condition of the property between landlord and tenant. Landlords are generally responsible for maintaining the property in a good state of repair and complying with health, safety, and maintenance standards, while tenants are generally responsible for keeping their unit reasonably clean and for repairing damage they or their guests cause beyond normal wear and tear.

A good lease will describe how repair requests should be made, and a reasonable timeline for addressing them. If a lease is silent on this, it doesn’t mean repairs aren’t the landlord’s responsibility — baseline maintenance obligations generally exist regardless of what the lease says — but having a clear process in writing tends to reduce friction and misunderstandings when something actually needs fixing.

It’s worth documenting the condition of the unit at move-in, ideally with dated photos, and keeping a written record of any repair requests you make during the tenancy along with the landlord’s response. This kind of record rarely matters when everything goes smoothly, but it becomes valuable quickly if a dispute arises later about who was responsible for a particular repair, or about the condition of the unit at move-out.

Many leases include additional rules covering things like pets, guests, smoking, alterations to the unit, and use of common areas. These provisions are enforceable to varying degrees — a blanket “no pets” clause, for example, is generally not enforceable in most residential tenancies in Ontario under current law, even if it appears in a signed lease, while other restrictions (like rules about noise or alterations) are more commonly upheld.

Because not every clause in a lease is automatically enforceable simply because it’s written down, it’s worth understanding which restrictions reflect genuine legal requirements and which may not hold up if challenged. This is an area where confirming your specific rights, rather than assuming the lease is the final word, can make a real difference.

Occupancy limits, guest policies, and rules about running a business out of a residential unit are also common inclusions. These provisions generally need to be reasonable and consistently applied — a rule that exists on paper but is selectively enforced against certain tenants can itself become a point of dispute. When reviewing a lease, it’s worth asking not just “what does this clause say” but “is this actually something I can live with day to day,” since some restrictions that seem minor at signing can become genuinely disruptive over a full lease term.

It’s also common for leases to include clauses about subletting or assigning the unit to someone else. Many leases require landlord consent before a tenant can sublet or assign, and that consent generally can’t be unreasonably withheld in most residential tenancies, though the process for requesting it — and what counts as “reasonable” — can vary. If you anticipate needing flexibility during the lease term, it’s worth understanding this clause before you’re actually in a position where you need to rely on it.

Before signing any lease, read it in full rather than skimming for the rent amount and move-in date. Pay particular attention to term length, renewal mechanics, deposit and rent increase terms, maintenance responsibilities, and any restrictions that matter to your specific situation. Our lease review checklist walks through this in a structured, step-by-step way.

It’s also worth thinking ahead to how the lease might end, even before it begins. Our guide to ending a lease agreement in Ontario covers notice periods, termination rights, and the issues that most often arise when a tenancy comes to a close — information that’s much easier to absorb calmly before you sign than to figure out under pressure later.

Finally, don’t rely solely on verbal promises made during a showing or negotiation — if a landlord or tenant agrees to something that matters to you, such as a specific move-in date, a promised repair, or an agreed exception to a standard clause, ask for it to be added to the written lease. A written lease that reflects everything that was actually agreed is far easier to enforce than a memory of a conversation months later.