Illegal Lease Clauses in Ontario: What Landlords Can’t Enforce

Ontario’s Residential Tenancies Act, 2006 sets out a framework of baseline rights and obligations for most residential tenancies in the province. One of its most important features, and one that surprises a lot of tenants and landlords alike, is that a lease term conflicting with the Act is generally void — it simply has no legal effect, even if both parties signed the document that contains it.

This rule exists because residential tenancy law in Ontario is designed to set a floor of protection that private agreements generally can’t go below. A landlord and tenant remain free to agree to terms that give the tenant more than the Act requires, but they generally can’t use a signed lease to strip away rights the Act guarantees. The clauses discussed below are some of the most common examples that keep showing up in standard-form leases despite generally being unenforceable.

It’s worth being clear about what this does and doesn’t mean. A void clause generally doesn’t invalidate the whole lease — the rest of the agreement typically remains binding. It also doesn’t mean a tenant can simply ignore any clause they personally dislike; it specifically refers to provisions that conflict with rights and protections the Act itself sets out.

It’s also worth understanding why this rule exists in the first place. Residential tenants and landlords generally don’t negotiate from an equal bargaining position — a prospective tenant facing a tight rental market often has little practical ability to push back on a standard-form lease term before signing. By making certain clauses void regardless of whether the tenant agreed to them, the Act removes the incentive for landlords to include terms a tenant might not feel able to refuse.

A blanket clause prohibiting pets is one of the clearest and most litigated examples of a void lease term in Ontario. Even though it’s extremely common to see “no pets” written into standard-form leases, the Act generally treats this type of provision as unenforceable. That doesn’t mean a pet can never become a genuine issue — serious damage, substantial interference with other tenants, or safety concerns can still be addressed — but the blanket prohibition itself generally has no legal effect. Our dedicated article on renting with pets in Ontario covers this in detail.

A related clause sometimes seen alongside a pet ban is one requiring a tenant to pay a penalty, surcharge, or extra monthly charge if a pet is discovered in the unit. Since the underlying prohibition is void, a penalty tied directly to breaching that prohibition generally doesn’t survive either — a landlord generally can’t enforce a financial consequence for violating a rule that itself has no legal effect.

Some leases include language suggesting the tenant gives up their right to dispute matters before the Landlord and Tenant Board, or agrees in advance to accept whatever outcome the landlord decides. A clause like this generally conflicts with the structure of the Act, which is built around tenants and landlords having access to the Board to resolve disputes, and is generally unenforceable regardless of how the waiver is worded.

A closely related clause sometimes seen is one asking a tenant to agree, in advance, to move out by a specific future date without the landlord needing to serve proper notice or obtain an order from the Board. Pre-signed agreements to vacate outside the Act’s normal notice and hearing process generally run into the same fundamental problem — they attempt to bypass a structure the Act doesn’t allow parties to opt out of by agreement.

A clause stating that a tenant may never have guests, under any circumstances, generally runs into the same problem as a no-pets clause: it conflicts with a tenant’s general right to reasonably enjoy their rental unit, which ordinarily includes having visitors. A more limited and reasonable guest policy — for example, addressing extended or recurring overnight stays that start to resemble an undisclosed additional occupant — is treated quite differently from an absolute, unconditional ban.

The underlying theme across these examples is consistent: a rule aimed at a specific, demonstrable problem tends to be viewed very differently from a blanket prohibition that removes a right entirely, regardless of context.

It’s worth distinguishing this from occupancy limits, which address a genuinely different concern — how many people can safely and lawfully live in a unit — rather than restricting a tenant’s ability to have visitors. A reasonable occupancy standard tied to the unit’s size and applicable safety codes is generally treated as a separate matter from a guest policy altogether.

Many residential tenancies in Ontario are subject to a provincial annual guideline that caps how much rent can increase in a given year, along with a required notice period before any increase takes effect. A lease clause that purports to build in an automatic increase beyond that guideline, or that skips the required notice, generally isn’t enforceable simply because the tenant signed a lease containing it.

Increases above the guideline generally require a landlord to follow a specific process, including, in limited circumstances, an application to the Landlord and Tenant Board. Our guide to rent increase rules in Ontario goes into this in more detail, including which tenancies are exempt from the guideline altogether.

It’s also worth noting that a lease can validly state the current rent and even describe how future increases will generally be handled, without necessarily being void — the problem arises specifically where a clause tries to guarantee an increase that skips the required notice, exceeds the guideline without following the proper process, or applies to a tenancy the guideline doesn’t actually cover in the way the clause assumes.

A recurring theme among problematic lease clauses is an attempt to charge something the Act doesn’t contemplate — a separate “pet deposit,” a non-refundable “administration fee,” a charge for processing a rental application, or a fee tied to using a specific payment method. Ontario’s rules around what a landlord can collect from a residential tenant are specific, generally limited to rent itself and a permitted rent deposit, and generally don’t stretch to cover ad hoc charges invented by a particular landlord.

Our article on deposits and last month’s rent in Ontario covers what’s actually permitted in more depth, which is a useful companion to understanding why many of these extra fees generally don’t hold up.

Charges tied to a specific payment method are another recurring example — a landlord requiring payment through a particular app and then charging a convenience fee on top, or charging more for accepting a cheque instead of e-transfer, generally runs into the same basic problem: it’s a charge the Act doesn’t contemplate, layered on top of the rent itself, regardless of how it’s labelled on an invoice or in the lease.

Spotting a clause that looks unusual is only the first step — understanding whether it actually conflicts with the Act, versus simply being an inconvenient but valid term, requires looking at the specific wording and the specific right it affects. Not every clause a tenant dislikes is void; the examples above are specific, recognized categories where the Act has been understood to override a conflicting lease term.

For a broader look at how Ontario leases are generally structured and what to check before signing, see our guide to lease agreements in Ontario, or browse the full Leases hub for related topics.