Mice Control Ontario — Out of Your Walls, for Good
Most companies seal on day one — and mice die inside your walls. Our exit-first protocol treats first so mice leave and die outside, then we return in ~3 weeks to verify and seal. Done properly, in two visits.
A female mouse can produce 5–10 litters per year (up to 60 offspring)
Mice can squeeze through a 6mm gap — the width of a pencil
Rodents chew electrical wiring — a leading cause of house fires
Mice spread hantavirus, salmonella, and other pathogens through droppings
Warning Signs
How to Know You Have Mice & Rats
Early detection is the key to fast, cost-effective elimination. Here's what to look for:
- ✓ Droppings along walls, in cabinets, under sinks (dark, rice-sized pellets)
- ✓ Gnaw marks on food packaging, wood trim, or wiring insulation
- ✓ Scratching or scurrying sounds in walls or ceiling at night
- ✓ Nesting material (shredded insulation, paper, fabric) in hidden areas
- ✓ Grease rub marks along walls and baseboards from repeated travel paths
Want to confirm exactly what you're seeing? Read our full rodent identification guide in the Ontario Pest Library — photos, look-alikes and species comparisons.
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If you're seeing any of these signs — or something that just doesn't look right — don't wait. Our licensed technicians will inspect, identify, and give you a clear answer with no obligation.
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Mice & Rats in Ontario
Species Found in Ontario Homes
House Mouse (Mus musculus)
Ontario's most common indoor rodent. Small, grey-brown, 7–10cm. Excellent climbers. Nest in wall voids, attics, and behind appliances.
Deer Mouse (Peromyscus maniculatus)
Tan/white colouring with large ears. Primary carrier of hantavirus. More common in rural Ontario and cottage country.
Norway Rat (Rattus norvegicus)
Much larger than mice — up to 40cm including tail. Burrow under foundations. Can cause significant structural damage and contaminate food stores.
Roof Rat (Rattus rattus)
Slimmer and more agile than Norway rats. Climb trees and enter via rooflines. Less common in Ontario but present in GTA.
Our Process
How We Eliminate Mice & Rats
A science-based, 4-step approach that treats the root cause — not just the symptoms.
Full Inspection + Entry Point Mapping
We inspect your entire property — interior and exterior — documenting every gap, crack, and penetration where rodents can enter. Most properties have 8–15 entry points the homeowner hasn't noticed.
Treat First — Exit Routes Stay Open
We place interior treatment and commercial-grade exterior bait stations based on evidence (droppings, rub marks, gnaw patterns). We deliberately do NOT seal on day one — exit routes stay open so mice leave the structure and die outside, not inside your walls.
Return Visit (~3 Weeks): Verify & Seal
Once the population is knocked down, we return to verify activity has stopped and seal minor entry points with professional-grade materials: galvanized steel mesh, expanding foam with steel wool, and weatherstripping. Sealing at the right time is what most companies get wrong.
Ongoing Protection + Guarantee
For properties with higher exterior pressure — ravine lots, farmland edges, older homes — the Sani IQ Rodent Program ($445 at the first visit, then $150 a quarter) keeps exterior stations in and serviced every quarter, all year, with a 12-month warranty.
Recommended Plan
Sani IQ Rodent Program — $445 at the first visit, then $150 a quarter
Mice inside? The Rodent Program removes them in three weeks, seals how they got in, and keeps the stations in all year with a 12-month warranty. Just want them kept out? Protect includes rodent prevention. Billed after each visit — no monthly fees. Free re-service between visits, a photo report every visit, cancel any time.
Common Questions
Mice & Rats Control — FAQ
How much does mice control cost in Ontario?
Mice inside? The Sani IQ Rodent Program is $445 at the first visit, then $150 a quarter — removal in three weeks, gaps sealed, stations kept in all year, 12-month warranty. Getting ahead of them? Sani IQ Protect ($249 a visit, four visits a year) includes rodent prevention.
I only saw one mouse. Is that a big deal?
One mouse typically means more. Mice are nocturnal and cautious — if you see one during the day, the population is likely large enough that competition for food is pushing them into the open. Act early: a small problem is much easier and cheaper to resolve.
Are your rodent treatments safe for pets?
Yes. We use tamper-resistant bait stations that are inaccessible to pets and children. The specific bait formulations we use are also selected for minimal risk to secondary poisoning in household pets.
Do you seal the entry points?
Yes — but not on day one, and that's deliberate. Seal too early and mice die inside your walls. We treat first so mice exit and die outside, then return in about three weeks to verify knockdown and seal minor entry points. Sealing is part of the service, sequenced correctly.
Where do the mice go to die?
Outside — by design. Because we keep exit routes open during treatment and control the exterior population with commercial-grade bait stations, mice leave the structure rather than dying in wall voids. That's the difference between our exit-first protocol and seal-first approaches.
How long does it take to get rid of mice?
Most active infestations show significant improvement within 1–2 weeks of treatment. Full resolution — verified knockdown plus sealing at the ~3-week return visit — typically completes within a month. Quarterly monitoring keeps the barrier effective across seasons.
Can mice come back after treatment?
If exclusion isn't done properly, yes. That's why every Sani IQ Protect plan includes rodent prevention on every visit — Ontario's freeze-thaw cycles and construction can open new gaps. We inspect and reseal every visit.
Where We Do This
Mice & Rodent Control Service Areas
Local pricing, process and FAQs for mice & rats in each city we serve.
- Professional Mice Exterminator in Barrie
- Mice Control in Bradford
- Mice Control in Brampton
- Mice Control in Burlington
- Mice Control in Etobicoke
- Mice Control in Guelph
- Mice Control in Hamilton
- Mice Control in King City
- Mice Control in Kitchener
- Mice Control in London
- Mice Control in Markham
- Mice Control in Milton
- Mice Control in Mississauga
- Mice Control in Newmarket
- Mice Control in Oakville
- Mice Control in Oshawa
- Mice Control in Richmond Hill
- Mice Control in Scarborough
- Mice Control in Toronto
- Mice Control in Vaughan
- Mice Control in Whitby
Also Common in Ontario
Related Pest Problems
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