Who Pays for Pest Control: Landlord or Tenant? (Ontario 2026)

Quick Answer: In Ontario, the landlord pays for pest control in almost every rental situation. Section 20 of the Residential Tenancies Act requires landlords to keep units fit for habitation — and that includes dealing with cockroaches, mice, and bed bugs. Tenants must keep the unit ordinarily clean and cooperate with treatment. Sani IQ works with both across Ontario.

Few things sour a landlord–tenant relationship faster than a pest problem. The tenant spots a cockroach in the kitchen, the landlord suspects housekeeping, and while both sides argue about who pays for pest control, the infestation does what infestations do: it grows. In a well-run rental, the standard is the same as in a well-run home — zero pest activity. One mouse or one cockroach is the start of a problem, not a footnote, and in a multi-unit building it rarely stays in one unit.

Here’s exactly how Ontario law divides the responsibility in 2026, what each side must do, and the fastest way to get the problem solved — because the legal fight is always more expensive than the treatment.

Who’s responsible? The scenarios at a glance

The pattern is clear: the treatment bill lands on the landlord nearly every time. Where tenants carry real risk is in cooperation — more on that below.

What does Ontario law actually say?

Section 20(1) of the Residential Tenancies Act, 2006 requires landlords to keep rental units and buildings “in a good state of repair and fit for habitation,” and to comply with health, safety, housing and maintenance standards under Ontario Regulation 517/06. Pest infestations fall squarely under that duty — regardless of what the lease says.

A landlord can’t contract out of this. A lease clause saying “tenant is responsible for all pest control” is not enforceable against the RTA’s maintenance obligation. And according to the Canadian Centre for Housing Rights, the duty applies even when the landlord believes the tenant’s housekeeping contributed to the problem — the landlord is still expected to treat the unit and work with the tenant to fix the underlying conditions.

For landlords, that’s not as one-sided as it sounds. A fast, professional response is also your legal shield: documented treatment by a licensed operator is the strongest evidence you’ve met your s. 20 duty if the dispute ever reaches the Landlord and Tenant Board.

What are tenants responsible for?

Tenants are responsible for the ordinary cleanliness of the unit and for cooperating with treatment. That means allowing entry after a proper Notice of Entry, preparing the unit as the pest control company instructs, and following prevention guidance afterward. A tenant who blocks access or skips prep can end up facing eviction proceedings — non-cooperation is taken seriously at the LTB.

Cooperation is where most treatment failures happen, and it’s worth being blunt about it: a cockroach program in a multi-unit building only works if every affected unit is prepped and treated. One unprepared unit becomes the reservoir that re-seeds the whole floor. German cockroaches move between units through shared walls, plumbing chases, and hallways — which is why our complete Ontario cockroach field guide treats “one roach” in an apartment as a building question, not a unit question.

Tenants should also know what they can’t do: withhold rent. Under the RTA, a pest problem — even a badly handled one — doesn’t create a right to stop paying rent, and tenants who do risk eviction for arrears.

Can a landlord charge a tenant for pest control?

Generally, no. The landlord must arrange and pay for treatment. A landlord may pursue costs from a tenant only in narrow circumstances — for example, where the tenant’s wilful or negligent conduct caused undue damage, or where non-cooperation forced repeat treatments. That’s a claim the landlord has to prove at the Landlord and Tenant Board; it’s not a line item they can simply add to the rent.

In practice, we rarely see cost-recovery fights end well for either side. The treatment itself is a few hundred dollars; an LTB application consumes months. The economics favour solving the problem first and keeping the paper trail.

What extra rules apply to Toronto landlords?

Toronto’s RentSafeTO program (apartment buildings of three or more storeys, ten or more units) adds hard deadlines: building owners must inspect common areas for pests at least once every 30 days, and must inspect any area of the property within 72 hours of receiving information about a pest problem. Where treatment is required, they must use a pest control company licensed by the Ministry of the Environment and keep pest management records posted for tenants.

That 72-hour clock matters. A Toronto tenant who reports cockroaches and hears nothing for two weeks doesn’t just have a maintenance complaint — the landlord is offside a municipal bylaw, and 311 will treat it that way. Other municipalities enforce similar expectations through their property standards bylaws, even without a RentSafeTO-style program. West-end landlords dealing with the city’s rising rat pressure can see how this plays out locally in our guide to pest control in Etobicoke.

What should a tenant do if the landlord won’t act?

Escalate in order — and document everything:

1. Report it in writing. Text or email the landlord with the date, what you saw, and where. Photos help.
2. Give a reasonable window. In Toronto buildings covered by RentSafeTO, that’s 72 hours to inspect; elsewhere, a few days is a fair benchmark for a first response.
3. Call 311 / your local Property Standards office. A municipal inspection creates an official record and real pressure.
4. File a T6 maintenance application with the Landlord and Tenant Board if the problem persists. Remedies can include rent abatement and an order to treat.
5. Keep cooperating. Prep the unit, allow entry, and follow the technician’s instructions — it protects both your case and your home.

The landlord’s playbook: treat fast, document everything

For landlords and property managers, the decision math is simple. A professional treatment is a controlled, one-time cost with a paper trail. A festering infestation is an uncontrolled cost: vacancy, unit turnover, a T6 application, rent abatement, and — in Durham and the eastern GTA, where older rental stock runs shallow foundations and original weeping tile — a pest problem that migrates into your other units. Landlords with rentals east of Toronto can lean on our local team for pest control in Oshawa.

DIY is the tempting middle path, and it’s worth pricing honestly: store-bought gels and traps cost less up front, but you supply the labour, the repeat visits, and the risk that a half-treated cockroach or mouse problem spreads to the next unit while you experiment. For an owner-occupier that’s a personal gamble; for a landlord it’s a gamble with a legal duty attached. Most landlords who run the numbers once never run them again.

For multi-unit owners and property managers, our commercial pest elimination programs put buildings on scheduled inspection and treatment cycles — the same documentation RentSafeTO expects, done for you.

Why Ontario landlords and tenants call Sani IQ

Sani IQ is a licensed Ontario operator using science-based Integrated Pest Management — we treat the source, not the symptom. Landlords get the documentation that proves their s. 20 duty is met: written findings, treatment records, and follow-up verification. Tenants get a technician who explains prep clearly and treatments that are safe for kids and pets. And both get the backing of 100+ five-star Google reviews and our “Pest-Free, OR It’s Free” guarantee — if pests return, so do we.

The bottom line

In Ontario, the landlord pays for pest control; the tenant keeps the unit clean and cooperates with treatment. Everything else — blame, chargebacks, withheld rent — is noise that lets the infestation compound. Whichever side of the lease you’re on, the winning move is the same: get a licensed professional in fast and let the documentation protect you.

Book it and forget about it: call (705) 302-1887 or request a free quote — same-day service is available across the GTA, Durham, and Simcoe County.

Frequently asked questions

Is a lease clause making the tenant pay for pest control enforceable in Ontario? No. Section 20 of the Residential Tenancies Act puts the maintenance duty — including pest control — on the landlord, and the Act can’t be contracted out of. A clause shifting that cost to the tenant won’t hold up at the Landlord and Tenant Board.

Who pays for bed bug treatment in an Ontario apartment? The landlord arranges and pays for bed bug treatment, even though bed bugs usually arrive by hitchhiking rather than through any building defect. The tenant’s job is preparation — laundering, decluttering, and allowing access — which is essential, because an unprepped unit is the most common reason bed bug treatments fail.

Can a tenant hire their own exterminator and deduct it from rent? That’s risky. Ontario tenants don’t have a general right to repair-and-deduct or to withhold rent. The safer route is written notice, a 311 property standards complaint, then a T6 application to the LTB, which can order treatment and compensation.

How fast must a landlord respond to a pest complaint? In Toronto buildings covered by RentSafeTO, the owner must inspect within 72 hours of learning about a pest issue and check common areas every 30 days. Outside Toronto there’s no universal deadline, but property standards officers and the LTB expect a prompt, professional response.

Who handles pests in a rented condo? The unit owner — as landlord — is responsible for pest control inside the unit under the RTA. Infestations in common elements like garbage rooms, hallways, or garages fall to the condo corporation. In practice the property manager coordinates both, which is why treating early matters.

Does the tenant ever have to pay? Only in narrow cases the landlord proves at the LTB — typically wilful or negligent conduct causing undue damage, or refusal to cooperate that forces repeat treatments. Ordinary living, and even imperfect housekeeping, doesn’t transfer the landlord’s duty to treat the unit.