Mice and Rat Problems in the GTA — Solved Permanently, Not Temporarily
Full rodent exclusion for GTA homes — trapping, entry point sealing, and monitoring. No poisons in living areas.
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GTA-Wide Coverage
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Typical Cost Range in the GTA
$200–$800
Final cost depends on severity, property size, and treatment method.
Every fall in the GTA, the same thing happens. Temperatures drop below 10°C and mice start looking for warmth. They find it in your house. A mouse can squeeze through a gap the width of a dime — 6 millimetres. That is the gap where your gas line enters through the foundation wall. That is the space under your garage door where the weatherstrip has worn down. That is the crack where the brick meets the window frame on a 40-year-old semi in Leslieville.
Mice are not just a nuisance. They chew electrical wires — the Electrical Safety Authority has linked rodent damage to house fires across Ontario. They contaminate kitchen surfaces with urine and droppings. A single pair of mice can produce 60+ offspring in a year. By the time you see one mouse in the kitchen, there are usually 15–20 more in the walls.
Rats are a different animal entirely. Norway rats in the GTA are mostly concentrated around older commercial areas, restaurants, and waterfronts — the Distillery District, Port Credit, parts of downtown Brampton. They burrow under foundations, and a rat can chew through concrete that has not fully cured. Rats require a different trapping approach and heavier exclusion materials.
Traps alone do not solve the problem. If the entry points are still open, new mice move in within days. Real rodent control means sealing every gap on the building envelope with steel wool, caulking, metal flashing, or concrete — and then trapping what is already inside.
How It Works
What to expect when you work with licensed mice & rat control professionals.
Entry Point Survey
A technician walks the entire foundation perimeter, checks every utility penetration (gas, water, electrical, cable), inspects the garage door seal, and examines where brick meets window and door frames. Inside, they check behind the stove, under the kitchen sink, and around basement utility stacks.
Exclusion First
Every gap 6mm or larger gets sealed. Steel wool packed into pipe gaps, metal flashing over larger holes, concrete patching for foundation cracks. The goal is to cut off entry before trapping begins — otherwise you are just catching new mice forever.
Strategic Trapping
Snap traps and tamper-resistant bait stations go along runways — the paths mice use along walls and baseboards. Placement matters more than quantity. Traps get checked and reset on a regular schedule until activity stops.
Monitoring & Verification
Follow-up visits 2–4 weeks later confirm the population is eliminated. Any new activity triggers additional trapping and a re-inspection of the exclusion work. Most companies include 2–3 follow-up visits in the initial price.
Signs You May Need Mice & Rat Control
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Rice-shaped droppings (3–6mm) along baseboards, in kitchen drawers, or under the sink — fresh droppings are dark and soft, old ones are grey and crumbly
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Scratching or scurrying sounds in walls and ceilings between midnight and 4 AM
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Gnaw marks on food packaging, electrical wires, or the corners of wooden baseboards
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Grease marks along walls where mice run the same path night after night — their fur leaves a dark residue
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Shredded paper, insulation, or fabric tucked into a hidden corner — nesting material
Why Hire a Professional
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Mice can fit through a 6mm gap. A professional knows every common entry point on GTA housing types — semis, detached, towns, condos — and seals them all in one visit.
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Poison bait inside living areas is dangerous for kids and pets, and a mouse that eats poison and dies inside a wall smells for weeks. Professionals use exterior bait stations and interior snap traps.
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Trapping without sealing entry points is pointless. New mice move in from outside within days. Exclusion first, trapping second.
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Rats require different trap sizes, different bait, and heavier exclusion materials than mice. A pro identifies which rodent you have and adjusts the approach.
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Most professional rodent jobs include 2–3 follow-up visits over 4–6 weeks. If activity continues, they come back at no extra charge.
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