Ontario Lease Clauses That Hold Up at the LTB

Q: What is the most common Ontario lease clause mistake landlords make?

Vague utility language is the most common problem we see. Tenant pays utilities sounds straightforward but collapses whenever a shared meter, condo fee, or disputed reading is involved. The second most common mistake is including clauses that directly conflict with the RTA, such as damage deposits or maintenance cost-sharing arrangements, believing that a signed agreement makes them enforceable. Neither vagueness nor signatures save a clause that conflicts with the Act.

Updated: April 2026

By Françoise Pollard, Realtor®, and Keith Goldson, Broker, Keith & Françoise Real Estate Team, eXp Realty Brokerage. We help tenants, landlords, and corporate relocators with leasing in Ontario across the GTA and Niagara Region, including Mississauga, Brampton, Milton, Burlington, Oakville, Hamilton, Etobicoke, Toronto, St. Catharines, Niagara Falls, Welland, and Thorold.

Key Takeaway

Ontario lease clauses stand or fall on one test: does the clause conflict with the Residential Tenancies Act? If it does, it carries no weight at the LTB regardless of what both parties signed. Landlords who rely on unenforceable clauses risk losing applications, facing rent abatements, and walking into hearings with no ground to stand on. The fix is straightforward: write clauses that add specificity without removing rights.

Most Ontario landlords assume that whatever they put in the lease, the tenant signs, both parties initial, becomes enforceable. It doesn’t work that way. Some Ontario lease clauses hold up at the Landlord and Tenant Board. Some fail completely. Others fall into a grey area where the outcome depends on how the clause was drafted and the specific facts at the hearing. Knowing which category a clause falls into before you sign determines whether your lease protects you or creates problems you didn’t see coming.

We review leases regularly across the GTA and Niagara Region for both landlords and tenants. The same mistakes appear repeatedly: vague utility terms that collapse into a dispute over a $300 hydro bill, maintenance clauses that the LTB won’t touch, and “standard” language borrowed from outdated agreements that contradicts the Residential Tenancies Act. This article covers what works, what fails, and what you need to decide before you sign. For a broader overview of how leasing works in Ontario, see our complete leasing guide.

On This Page

What actually matters with Ontario lease clauses How additional terms work What to include in your Ontario lease Clauses that hold up at the LTB Clauses in a grey area Condo-specific lease clauses What happens when clauses don’t hold up How to write clauses that hold up Your Ontario lease strategy Frequently asked questions

What Actually Matters With Ontario Lease Clauses

Three things determine whether a clause holds up: whether it conflicts with the RTA, whether it’s specific enough for the LTB to enforce, and whether it sits in the right document. Section 4 of the RTA voids any term inconsistent with the Act, regardless of who signed it. Specificity is what separates a clause the LTB will enforce from one a member sets aside as too vague. The right document means terms specific to a tenancy belong in Section 15 of the Ontario Standard Lease, not buried in a side agreement that may not survive scrutiny.

How Additional Terms Work in the Ontario Standard Lease

Since April 30, 2018, most private residential landlords in Ontario must use the Ontario Standard Form of Lease. The standard lease includes Section 15, where landlords and tenants can agree to additional terms beyond the default requirements. Those additional terms are not automatically enforceable just because both parties signed them.

The LTB applies one test to every additional term: is it consistent with the Residential Tenancies Act? If the clause conflicts with the Act, it carries no legal weight. The rest of the lease stays intact, but that clause disappears entirely at a hearing. Landlords often discover this at the worst possible moment, when they’re trying to enforce something they believed was airtight.

The legal foundation: Section 4 of the RTA

Section 4 of the Residential Tenancies Act states that any provision in a tenancy agreement inconsistent with the Act is void. Section 15 of the Ontario Standard Lease form is where landlords add additional terms, and that section itself states explicitly that an additional term cannot take away a right or responsibility under the RTA. The two work together: Section 4 sets the rule, and Section 15 of the standard lease form is the only place additional terms belong. A clause must be clear, specific, and legally permissible to survive. Broad, vague, or rights-removing language fails at every one of those tests. For the full breakdown of which specific clauses the LTB will never enforce, see our article on illegal lease clauses in Ontario.

What Should You Include in Your Ontario Lease?

Most landlords think about what they want to restrict. The more useful question is what the lease actually needs to include, what it’s smart to add even when not required, and what to leave out entirely.

Must include

Beyond the standard lease fields, every Ontario lease should specify the exact utility split. State which utilities the tenant pays for and which the landlord covers, and name each one explicitly: hydro, gas, water, hot water tank rental. Vague references to “utilities” produce disputes. The lease should also identify parking by unit or spot number, state the key deposit amount if applicable, and document any rent discount clearly in the discount section of the standard form.

Optional but smart

Smoking restrictions belong here because the RTA itself does not regulate smoking; without a clear lease term, the landlord has no enforcement tool. BBQ rules tied to fire code or the condo declaration belong here because tying the restriction to a specific source gives it the legal anchor it needs. Lawn care responsibilities for houses with yards belong here when the tenant has exclusive yard access, since Section 20 governs the unit itself but the LTB has consistently allowed this kind of property-specific arrangement for outdoor maintenance. A clause requiring the tenant to notify the landlord promptly of maintenance issues is reasonable, enforceable, and protects both sides. For condos, incorporating the corporation’s declaration and by-laws by reference is both smart and legally sound. Specifying a preferred method of rent payment is also practical, though landlords cannot make post-dated cheques mandatory.

Avoid completely

Some Ontario lease clauses fail at the LTB without exception: damage deposits, no-pet clauses, guest restrictions, late payment fees, early termination penalties, and any clause that shifts mandatory maintenance obligations to the tenant. Including them wastes space, creates false expectations, and costs credibility at a hearing when the LTB member sees a lease built on unenforceable language. If you’re unsure whether a clause crosses the line, the detailed breakdown is in our article on illegal lease clauses in Ontario. For landlord and tenant rights more broadly, see our guide on tenant rights and landlord obligations in Ontario.

What Ontario Lease Clauses Actually Hold Up at the LTB?

Clauses that hold up share common traits: they’re specific, they don’t remove RTA rights, and they reflect a reasonable expectation given the property type. The following categories have consistent enforcement records at the LTB.

Utility clauses

Clauses that assign responsibility for specific utilities to the tenant work when they’re explicit. “Tenant is responsible for hydro as billed directly by Toronto Hydro” holds up. “Tenant pays utilities” does not, because it’s vague and open to dispute. If the tenant doesn’t control a utility, such as gas heat where the furnace is landlord-managed, the landlord cannot assign that cost to the tenant. The LTB evaluates whether the allocation matches actual access and control.

Smoking restrictions

A clause prohibiting smoking inside the unit, on the balcony, or in common areas is enforceable. The LTB consistently supports smoking bans when they appear in the lease before the tenancy begins. Specify exactly which areas the ban covers. “No smoking” without a defined scope leaves room for argument. “No smoking inside the unit, on the balcony, or within 9 metres of any entrance” is specific enough to enforce.

Parking assignment

Clauses that assign a parking spot by number and state any applicable fee are enforceable. The LTB will honour a clear parking assignment that forms part of the original tenancy agreement. The clause cannot be used as a penalty mechanism. A landlord who threatens to revoke parking access mid-tenancy because of an unrelated dispute will not find support at the Board.

Key replacement costs

A clause charging the tenant for lost keys is enforceable when the fee reflects actual replacement cost. The RTA limits the key deposit to the actual cost of replacing the key, which is typically a small amount for standard residential keys. A clause charging well above replacement cost fails because it functions as a penalty rather than a recovery of expense. Any amount beyond actual cost crosses into illegal deposit territory.

Increased entry notice

Section 27 of the RTA sets the minimum at 24 hours’ written notice before entry. A clause requiring 48 hours’ notice is enforceable because it gives the tenant more protection than the law requires. You can increase the minimum. You cannot reduce it. A clause saying “12 hours’ notice is sufficient” has no effect at the LTB. For a full breakdown of how entry rules apply throughout the tenancy, see our guide on access and showings during a tenancy in Ontario.

Lawn and yard maintenance

For houses where the tenant has exclusive use of the yard, a clause assigning lawn mowing and basic garden maintenance to the tenant can be enforceable. The clause must match the property type and the tenant’s actual access. A tenant renting a basement unit with no yard access cannot be held responsible for the property’s outdoor maintenance. When the obligation fits the tenancy, the LTB generally supports it.

Which Ontario Lease Clauses Fall Into a Grey Area?

Some clauses are neither clearly enforceable nor clearly prohibited. For these, the LTB’s decision depends on how the landlord drafted the clause, whether it reads as reasonable in context, and the specific facts of the dispute.

Tenant insurance requirements

A clause requiring liability insurance has stronger footing than one requiring contents insurance, because the RTA gives landlords no authority to mandate content coverage. Liability coverage protects the property and other tenants, which gives the clause a more defensible rationale. Even so, enforcement at the LTB is inconsistent. If you include this clause, state the reason clearly and keep the requirement proportionate.

Air conditioning

Charging separately for air conditioning is enforceable if AC is not a standard feature of the unit and the arrangement was clear at the start of the tenancy. Attempting to add an AC charge mid-tenancy, or charging for AC service when the unit already had AC installed, fails. The LTB treats AC as a standard feature once it’s present in the unit.

BBQ restrictions

A BBQ ban in a condo where the declaration or fire code prohibits it is enforceable when the lease references that source directly. A blanket BBQ ban in a house with a private yard is much harder to defend. Tie the restriction to a specific rule or safety reason. “No BBQs on the balcony per the condominium corporation’s fire code policy” holds up. “No BBQs” with no explanation does not.

Subletting consent requirements

A clause requiring the landlord’s written consent before subletting is enforceable and standard. A clause prohibiting subletting entirely is not. Section 97 of the RTA gives tenants the right to sublet with landlord consent, and Section 97(2) specifies that consent cannot be arbitrarily or unreasonably withheld. Section 95 covers assignment, where consent rules also apply. The lease can make the process clear. It cannot eliminate the right.

Condo-Specific Ontario Lease Clauses

Condo rentals involve an additional layer of rules. The condominium corporation’s declaration and by-laws apply to everyone in the building, including tenants. Landlords can incorporate those requirements directly into the lease, and the LTB supports this approach because the obligation comes from the Condominium Act, not the landlord’s preference.

Referencing the declaration

Include a clause stating that the tenant agrees to comply with all condominium declaration provisions and by-laws. This converts condo rule violations into lease violations the landlord can act on. Keep a copy of the current declaration and rules on file so you can produce them at a hearing if needed. Rules that aren’t documented create enforcement problems regardless of what the lease says.

Parking and locker assignment

Identify the parking space and locker by their registered unit or level number. State any monthly parking fee separately. Specify what happens if the tenant uses the wrong space or loses a parking pass. Condo parking assignments are frequently the subject of disputes. Specific language prevents most of them.

Noise and common area conduct

A clause requiring the tenant not to cause noise that disturbs other residents between 10 p.m. and 7 a.m. is enforceable. Tie the clause to the condo corporation’s quiet hours if the declaration specifies them. A clause requiring the tenant not to obstruct hallways, stairwells, or lobby areas reflects the landlord’s legal obligation and aligns with condo requirements. Both hold up at the LTB consistently.

Utility responsibility in condos

Condo utility structures vary. Some buildings bill hydro directly to unit owners; others include it in maintenance fees. Clarify exactly which utilities the condo covers through maintenance fees and which the tenant pays separately. Mismatch between the lease and the actual billing structure produces disputes at the end of every tenancy. Get this right at the start. For more on how condo tenancies work in Ontario, see our guide on renting a condo in Ontario.

Worried Your Lease Has Clauses That Won’t Hold Up?

Most landlords don’t discover a clause is unenforceable until it costs them at a hearing. Most tenants don’t realize a clause is void until after they’ve complied with it. We can review the lease before either side has to find out the hard way.

Talk to Our Team

What Happens If Your Ontario Lease Clauses Don’t Hold Up?

This is the section most landlords skip, and it’s where the real cost lives.

The clause is simply ignored

At a hearing, the LTB member will not enforce a clause that conflicts with the RTA. If a landlord built their entire application around that clause, the member sets it aside entirely. At that point, the landlord has no basis for the position they took and no time to build a new one.

The application fails

A landlord who files an L2 application to evict a tenant based on a lease clause violation, where that clause is void under the Act, will have the application dismissed. Both the filing fee and preparation time are gone. Hearing dates at the LTB occupy months of waiting under current timelines, and none of that is recoverable. Discovering a clause doesn’t work this way is one of the more expensive lessons in landlord-tenant law. For the full picture of how leases properly end, including the difference between enforceable termination and unenforceable termination penalty clauses, see our guide on how residential leases end in Ontario.

The eviction timeline extends

According to Tribunals Ontario, LTB hearings for most application types currently schedule five to seven months out from the filing date. A landlord who files based on an unenforceable clause, has the application dismissed, and then re-files correctly has effectively added most of a year to the resolution timeline. That delay has a direct financial cost in unpaid rent, ongoing maintenance obligations, and lost opportunity.

Credibility damage affects the whole case

A lease filled with void clauses tells the LTB member something about how the landlord approaches the tenancy. Landlords who arrive at hearings relying on unenforceable language lose credibility on the legitimate parts of their application too. The member’s assessment of good faith matters in close cases, and a lease built on clauses the Act explicitly voids is not a strong start.

We’ve Seen This Play Out

We worked with a landlord in Hamilton who had included a clause requiring the tenant to pay the first $300 of any repair inside the unit. The relationship deteriorated after a plumbing issue, and the landlord withheld a portion of the last month’s rent deposit to recover the repair cost the tenant had refused to cover. At the LTB hearing, the member noted that the clause directly conflicted with the landlord’s maintenance obligations under Section 20 of the RTA, that the deduction from the deposit was also improper, and the landlord ended up ordered to repay the full amount. The clause created the entire dispute. Without it, the landlord had a straightforward tenancy.

We also saw a Toronto landlord lose a case over a utility clause that said simply “tenant pays utilities.” The tenant paid hydro but disputed gas costs because the building’s gas supply ran through a shared meter the tenant couldn’t read or verify. The LTB found the clause too vague to enforce for the gas portion and ruled in the tenant’s favour. The fix would have taken one sentence: naming each utility explicitly and linking each one to the specific meter or account the tenant controlled. Vague language always fails when money is at stake.

How Do You Write Ontario Lease Clauses That Hold Up?

Four principles separate enforceable clauses from ones that collapse under scrutiny.

Step 1: Start with RTA compliance

Before writing any additional term, ask whether it conflicts with the Act. If a clause removes a right the RTA gives tenants, restricts something the Act explicitly protects, or imposes a fee the Act prohibits, remove it. There is no version of an illegal clause that the LTB will enforce, regardless of how it’s worded. Start from compliance, not from what you wish the law permitted.

Step 2: Avoid removing rights

The RTA sets a floor. Additional terms can build above that floor by adding specificity, assigning responsibilities, or clarifying arrangements. They cannot go below it. A clause that reduces tenant rights in any area the Act covers is void. Focus the additional terms section on things the Act doesn’t already address, such as parking assignments, utility splits, smoking restrictions, and property-specific maintenance arrangements.

Step 3: Keep wording specific and measurable

Vague clauses fail because the LTB cannot enforce something ambiguous. “Tenant must keep the unit clean” means nothing at a hearing. “Tenant is responsible for weekly garbage removal to the municipal collection point at the end of the driveway” is specific and measurable. Write every clause with one question in mind: if this ends up in a dispute, can a member read this clause and know exactly what obligation it created?

Step 4: Test for enforceability before signing

Before adding any clause to the additional terms section, test it against three questions. Does it conflict with the RTA? Does it remove a tenant right? Is it specific enough to enforce? If the answer to the first two is no and the answer to the third is yes, the clause will likely hold up. If it fails any one of those tests, rewrite it or remove it. A shorter lease with enforceable terms is more valuable than a longer one full of clauses the LTB will strike down in a dispute.

What This Means for Your Ontario Lease Strategy

An Ontario lease succeeds or fails on what’s in Section 15 of the standard lease form. The mandatory sections handle themselves. Ontario lease clauses in the additional terms section are where landlords win or lose at the LTB, and where tenants either get a fair agreement or get clauses that won’t survive scrutiny.

Three principles separate clean leases from costly ones. First, every additional term must pass the RTA compliance test before it goes in the lease. If it conflicts with the Act, no amount of agreement on the front end makes it enforceable on the back end. Second, specificity beats coverage. A short Section 15 with three precise terms outperforms a long one with eight vague ones. The LTB enforces what it can interpret, and ambiguity always works against whoever is trying to rely on the clause. Third, the cost of getting the lease right at signing is always lower than the cost of an LTB hearing afterward, regardless of which side of the dispute you’re on.

For landlords, the strategic move is a clean lease with enforceable additional terms that anchor credibility at the Board. For tenants, the strategic move is reading every additional term against the RTA before signing and pushing back on anything that doesn’t fit. Either way, the work happens before the lease takes effect, not after a dispute starts.

Read These Next

Leasing in Ontario: Complete Guide : The full landlord and tenant process from listing to move-out.
Illegal Lease Clauses in Ontario : Which clauses are void under the RTA and what happens when landlords try to enforce them.
Tenant Rights and Landlord Obligations : What the RTA requires once the tenancy begins.
Access and Showings During a Tenancy : How Section 27 entry rules apply throughout the tenancy.
How Residential Leases End in Ontario : Why early termination penalty clauses fail and what actually ends a tenancy.

Ontario Lease Clauses: Your Questions Answered

Does a tenant have to follow an Ontario lease clause that conflicts with the RTA?

No. Section 4 of the Residential Tenancies Act voids any lease term that contradicts the Act. The clause carries no legal weight even if the tenant signed it voluntarily. The rest of the lease remains valid, but that specific term is unenforceable. If a landlord attempts to enforce a void clause, the tenant can raise the issue in writing or file the appropriate application with the LTB.

Can a landlord require tenant insurance in an Ontario lease?

Requiring liability insurance has stronger legal footing than requiring contents insurance, because the RTA gives landlords no authority to mandate content coverage. Even liability requirements face inconsistent enforcement at the LTB. If you include this clause, state the reason clearly, keep the requirement proportionate, and consult a licensed paralegal before relying on it in a dispute.

Can a landlord require post-dated cheques in an Ontario lease?

No. Landlords can request post-dated cheques, but a clause making them mandatory as a condition of the tenancy is unenforceable under the RTA. A tenant who declines to provide post-dated cheques cannot be evicted or penalized for that refusal. Other payment methods the tenant proposes must be considered reasonable alternatives.

Can a landlord make the tenant responsible for lawn care in an Ontario lease?

Yes, in limited circumstances. For a house where the tenant has exclusive use of the yard, a clause assigning lawn mowing and basic outdoor upkeep to the tenant can be enforceable. The obligation must match the tenant’s actual access and the property type. A basement tenant with no yard access cannot be held responsible for outdoor maintenance. When the obligation fits the tenancy, the LTB generally supports it.

What is the most common Ontario lease clause mistake landlords make?

Vague utility language is the most common problem we see. “Tenant pays utilities” sounds straightforward but collapses whenever a shared meter, condo fee, or disputed reading is involved. The second most common mistake is including clauses that directly conflict with the RTA, such as damage deposits or maintenance cost-sharing arrangements, believing that a signed agreement makes them enforceable. Neither vagueness nor signatures save a clause that conflicts with the Act.

How do Ontario lease clauses differ for condos versus houses?

Condo leases involve an additional layer of obligations from the condominium corporation’s declaration and by-laws. Landlords can incorporate those rules by reference in the lease, and the LTB supports this approach. Houses involve fewer external rules but more property-specific obligations around yard care, parking, and exterior maintenance. In both cases, the RTA governs the tenancy, and any clause that conflicts with it is void regardless of the property type.

Keith & Françoise Real Estate Team

eXp Realty Brokerage · GTA & Niagara Region

Françoise Pollard, Realtor®, and Keith Goldson, Broker, review residential leases for landlords and tenants across the GTA and Niagara Region. We’ve handled lease reviews in Mississauga, Burlington, Hamilton, and St. Catharines, including additional-terms audits before signing, utility split clean-up, condo declaration referencing, and lease redrafts for landlords who discovered clauses wouldn’t hold up. With more than 30 years of combined experience, we help both sides understand what actually works at the LTB. For LTB hearings or legal advice on contested clauses, we always recommend working with a licensed paralegal.

Worried Your Lease Won’t Hold Up at the LTB?

Whether you’re drafting a lease or reviewing one as a tenant, we can walk you through what holds up and what creates problems. Free consultation for GTA and Niagara Region clients. For LTB filings or legal advice on contested clauses, we always refer clients to a licensed paralegal.

Talk to Our Team

Ontario landlord and tenant law can change. This article reflects legislation and procedures as of the date noted and is for general informational purposes only. Bill 60 (Fighting Delays, Building Faster Act, 2025) was passed on November 24, 2025 but its RTA amendments have not yet come into force. Confirm current rules and obligations with a qualified legal professional or licensed paralegal before making decisions.