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

Scenario	Who’s responsible
Cockroaches, mice, or bed bugs in an apartment or rented house	Landlord — must arrange and pay for treatment (RTA s. 20)
Infestation spreading between units in a building	Landlord — building-wide response is a maintenance obligation
Wasp nest on the building exterior, balcony, or eaves	Landlord — structure and exterior are the landlord’s to maintain
Unit conditions attracting pests (garbage, clutter)	Shared — landlord still treats; tenant must restore ordinary cleanliness or risk eviction proceedings
Tenant refuses entry or won’t prepare the unit for treatment	Tenant problem — non-cooperation can support a landlord’s application to the LTB
Condo rented out to a tenant	Unit owner (landlord) for the unit; condo corporation for common elements
Commercial lease (restaurant, office)	Whatever the lease says — the RTA doesn’t apply to commercial tenancies

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.

Bed bugs specifically: who pays, and what each side has to do

Bed bugs are the pest that generates the most landlord-tenant conflict in Ontario, and the answer is the same as it is for cockroaches or mice: in almost every case the landlord arranges and pays for the treatment. Section 20(1) of the Residential Tenancies Act makes the landlord responsible for keeping the unit fit for habitation and in compliance with health and maintenance standards, and an active bed bug infestation fails that test. This holds even when nobody can prove where the bugs came from — and with bed bugs, nobody usually can.

The narrow exception is wilful damage or negligence under section 34, and landlords consistently underestimate how hard that is to establish at the Landlord and Tenant Board. A tenant bringing in a used mattress is not, on its own, wilful damage. A tenant who repeatedly refuses to prepare the unit after written notice is a different matter, and that is the version that occasionally succeeds.

What the tenant is actually on the hook for

Tenants don’t pay for treatment, but they do have a real cooperation duty, and failing it is the fastest way to lose an LTB application:

• Report in writing, immediately. Email or text, so it is dated. A verbal report to a superintendent is very hard to prove three months later.
• Prepare the unit as instructed. Bagging clothing, laundering on high heat, pulling furniture off walls, clearing closet floors. Preparation is genuinely most of what makes a treatment work — a technician cannot treat what they cannot reach.
• Give access on the scheduled day. Refusing entry after proper notice hands the landlord a defence.
• Don’t self-treat first. Store-bought foggers scatter bed bugs deeper into wall voids and into neighbouring units, and they make professional treatment slower and more expensive.

The one trap tenants fall into

You cannot withhold rent over a pest problem in Ontario. Not for bed bugs, not for anything. The RTA gives no such right, and tenants who stop paying end up defending an eviction for arrears instead of pursuing their actual complaint. The correct route is a T6 application to the LTB for maintenance, which can order the work done and can order a rent abatement for the period you lived with the problem.

Why a single unit is never a single unit

Bed bugs move through wall voids, along shared plumbing and electrical runs, and in the hallway on people and belongings. By the time one unit reports, adjacent and directly above/below units are frequently already involved.

This is the arithmetic landlords get wrong. Treating one reported unit and stopping is the cheapest invoice and the most expensive outcome — the infestation re-seeds from an unreported neighbour and you pay for the same building three or four times. Inspecting the surrounding units at the same time costs more on day one and routinely costs less by month six. For landlords and property managers running multiple units, our commercial and multi-unit pest elimination programs are built around exactly this: treat the block, not the complaint.

Documentation, for both sides

Whoever you are, keep dated photographs, every written report and reply, all invoices and technician reports, and a log of every visit. LTB outcomes in these disputes turn on the paper trail far more often than on the pest.

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.

Every Sani IQ job begins with a $95 professional inspection, credited in full when you go ahead with the treatment — which for a bed bug dispute is usually the single most useful document either side can get, because it establishes what is actually present and how far it has spread.

Landlords and property managers across Toronto and the wider GTA use us because we inspect the surrounding units, not just the one that complained, and because we document every visit in a form that stands up at the Board. For any building with more than a few units, the annual protection plan is the recommendation, not the one-time call. A one-time treatment resolves the unit in front of you; scheduled year-round coverage is what stops the same building from generating the same complaint next spring, and it converts an unpredictable emergency cost into a fixed annual line. Our plans and pricing page sets out the tiers, or the free quote quiz will narrow it in about two minutes.

Tenants: if your landlord is not acting, you can still book an inspection yourself for the $95 fee to document what is in the unit. Call (705) 302-1887.

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 147 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.

There is more detail in the bed bugs section above, including what tenants must do to prepare and why withholding rent backfires.

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.