Moving Into a Toronto Apartment This September? How to Check for Bed Bugs Before You Unpack

Quick answer: Spend 20 minutes inspecting a Toronto apartment while it is still empty — mattress seams and box spring corners, the headboard and the wall behind it, baseboards, outlet and switch plates, closet tracks, and any furniture left behind. An empty unit is the easiest time in a building’s life to spot bed bugs, because there is almost nowhere for them to hide. If you find rusty spots, black specks, shed skins, or a live insect, do not move your belongings in: document it, notify the landlord in writing, and get a professional inspection first. Sani IQ inspects and treats bed bugs across Toronto and the GTA — (705) 302-1887.

September 1 is the biggest turnover day in Toronto’s rental calendar. Leases end, students arrive, and tens of thousands of people move their entire lives through elevators, hallways, and stairwells in about seventy-two hours. It is also the single best day of the year for a bed bug population to relocate.

Bed bugs do not fly or jump, and they do not walk across the city on their own. They move because people move them: in mattresses, in couch cushions, in cardboard boxes, in the seams of a duffel bag that sat in a hallway for ten minutes next to somebody else’s furniture. Concentrate thousands of those movements into one weekend in dense mid-rise and high-rise buildings, and you get the seasonal bump Toronto pest control companies see every autumn.

The good news is that renters have far more leverage than they think, and it expires the moment the moving truck is unloaded.

Why an empty unit is your best inspection opportunity

In a lived-in apartment, bed bugs have hundreds of hiding places: mattress folds, the underside of a nightstand, a picture frame, a stack of books, the pleats of a curtain. Finding them takes patience, a flashlight, and a willingness to take furniture apart.

In an empty unit nearly all of those options are gone. What remains is the building itself — baseboards, door frames, window casings, closet tracks, outlet plates, carpet edges, and whatever furniture the last tenant abandoned. That is a short list you can work through in about twenty minutes.

There is a second advantage: anything you find in an empty unit is unambiguously not yours. Discover bed bugs three weeks after moving in and you will spend a frustrating amount of energy arguing about who brought them.

What you are actually looking for

Most people go looking for the insect itself and miss everything else. Adult bed bugs are about the size and shape of an apple seed — roughly 5 mm, flat, reddish-brown — but they are nocturnal and good at hiding. The signs they leave behind are far more common and easier to spot.

• Faecal spotting — small black or dark brown dots, usually clustered, like a fine-tip marker touched the surface; on fabric they bleed at the edges. The most reliable indicator, and it persists long after the insects are gone.
• Rusty or reddish smears — crushed bugs or blood staining, typically along a mattress seam or where a mattress meets a frame.
• Shed skins — pale, translucent shells holding the shape of the insect. Finding them means a population was breeding here, not just passing through.
• Eggs — about 1 mm, pearly white, glued into cracks. Hard to see without good light, unmistakable once you know the shape.
• A sweet, musty odour — heavy infestations smell like overripe raspberries or coriander. If an empty unit smells like that, stop and call a professional.

Bring a bright flashlight — your phone’s torch is adequate — and something thin and rigid to run along seams and cracks. An old credit card works. Do not use your fingers.

The 20-minute room-by-room inspection

The bedroom, first and longest. Evidence concentrates where the previous tenant slept. Run your flashlight along the top and bottom edges of the baseboard, paying attention to the corner nearest where a bed would have stood, and check behind loose sections with your card.

Then the outlet and switch plates on that wall. This is the step almost everyone skips and the one that most often produces a find — bed bugs use the wall void behind an outlet as a harbourage, and in multi-unit buildings that void can connect to the neighbouring apartment. Shine your light into the gaps and look for black spotting on the plate edge or the paint around it.

Finish with the window casing, the closet door track, the shelf brackets, and the underside of any built-in shelving.

Any furniture left behind. A mattress, box spring, or bed frame is the highest-risk item in the apartment and deserves half your inspection time. Run your card along every seam, tag, and piping edge — the piping around the top and bottom perimeter is the classic harbourage. Stand the box spring on its side and inspect the underside, including the corner protectors and the wooden frame under the dust cover. If the cover is torn, look inside.

For a wooden or upholstered frame, check every joint, every screw hole, and the underside of every horizontal surface. Wall-mounted upholstered headboards should be lifted off and checked on the back — that is where headboard infestations live, and you cannot see it from the front.

If you find anything on abandoned furniture, ask the landlord to remove it before you move in.

Living room, hallway, kitchen, bathroom. Same method, less time. Baseboards where a couch would have sat, outlet plates, window sills, the entrance door frame, and the gap behind the kitchen toe-kick.

The building, not just the unit. Check the hallway carpet edges outside your door and the garbage room. A pile of discarded mattresses by the loading dock is information about the building, not proof about your unit.

Before you sign: questions that are fair to ask

Ontario landlords are not required to volunteer a pest history, but they are required to keep the unit in a good state of repair and fit for habitation — and a bed bug infestation is a maintenance issue. Ask, by email, so you have a record:

• Has this unit or an adjacent unit been treated for bed bugs in the last twelve months?
• Was the treatment performed by a licensed company, and how many visits?
• Is there a follow-up inspection scheduled?
• Does the building have a written pest management policy?

A landlord who answers plainly is a good sign. A treated unit is not automatically a problem — professionally treated and verified is often safer than an unknown history. What should concern you is evasiveness, or a treatment history of a single visit, since eggs are not reliably killed by the first application.

For who is on the hook once you are living there, our guide on who pays for pest control, landlord or tenant, in Ontario walks through the Residential Tenancies Act framework.

Your first 48 hours protocol

The unit was clean and you signed. The remaining risk on moving day comes from your own belongings and the shared spaces you drag them through.

Do not use found cardboard. Free boxes from behind a store or a building’s recycling room are a genuine transmission route. Use new boxes or plastic totes.

Stage your belongings in one room. Everything in the middle of the living room floor, away from walls, for the first day rather than straight into closets and drawers. If something travelled with you, it is contained.

Launder textiles on arrival. Bedding, clothing, curtains, cloth bags — hot wash, then a hot dryer cycle of at least 30 minutes. The dryer heat is what kills bed bugs and eggs, not the wash.

Encase the mattress and box spring. Certified encasements on both, from day one, take the two best harbourages in the apartment out of play and make any future problem far easier to detect and treat.

Do not push the bed against the wall. A few centimetres of gap, with legs touching nothing but the floor, means the only route onto the bed is up the legs — where interceptor cups will catch traffic.

Check again at week two and week six. Bites often do not appear for days after the first feeding, and a small introduced population takes weeks to become obvious. A five-minute flashlight check of the mattress seams catches problems while they are still cheap to solve.

When to stop and call a professional

Call if you find live insects, shed skins, or clustered faecal spotting in a unit you are about to occupy; if you start waking with bites in a line or cluster within the first month; or if a neighbour mentions the unit next door, above, or below is being treated — bed bugs move laterally through shared walls.

Do not start with a hardware store spray. Over-the-counter pyrethroid products are the most common reason a small, containable problem becomes a building-wide one: they kill a few insects, scatter the rest into wall voids and adjacent rooms, and select for resistance in what survives.

Sani IQ handles bed bug inspection and treatment across Toronto and the wider GTA. Our guide on how long it takes to get rid of bed bugs in Ontario covers what a full protocol involves, and our bed bug treatment cost guide for Toronto and Ontario explains what drives the price of a job.

See our full range of residential pest control services, browse our pest reference library, or use the free quote quiz for a fast estimate. Weighing a one-time visit against ongoing coverage in a building with a history? Our plans and pricing page lays out the options. For local service details, see our Toronto pest control page — or call (705) 302-1887.

FAQ

Can I refuse to move in if I find bed bugs before my lease starts? You cannot unilaterally cancel a signed lease, but you can refuse to move belongings in until the unit is treated and verified — put that in writing to the landlord immediately, with photographs. A unit with an active infestation may not meet the landlord’s maintenance obligations under the Residential Tenancies Act, and if the landlord will not act, the Landlord and Tenant Board is the venue.

How long can bed bugs survive in an empty apartment? Longer than most people expect. At normal indoor temperatures an adult can survive several months without a blood meal, longer in cooler conditions. A unit vacant for six weeks is not automatically clear — which is why the inspection matters even when the previous tenant left months ago.

Do bed bugs only live in dirty apartments? No. They feed on blood, not food waste, and appear in immaculate downtown condos as readily as anywhere else. Clutter matters only because it adds hiding places and makes treatment harder.

What if the building has bed bugs but my unit does not? Ask what the building’s treatment protocol is and whether adjacent units are monitored. Bed bugs spread through wall voids, plumbing chases, and electrical conduits, so a neighbouring infestation is a real risk. Encasements, interceptors under the bed legs, and sealing gaps around baseboards and outlet plates are the practical defences.

Should I inspect a furnished rental differently? Yes — allow twice the time and inspect every upholstered piece the way you would a mattress: seams, piping, underside, and the back of any headboard. Furnished units carry more risk because the furniture has a history you cannot verify.