Ant Control in Markham
Professional ant control services in Markham. Licensed, insured, and locally trusted.
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Typical Cost in Markham
$150–$500
Final cost depends on severity, property size, and treatment method.
Markham has two pest realities separated by about 30 years of construction. Walk down Main Street Unionville and the heritage homes there have fieldstone foundations with gaps that mice have been using since before the town had a traffic light. Drive 15 minutes north to Cornell or Box Grove and the brand-new detached homes are already getting mice through settling gaps around gas lines and dryer vents — the foundation shifts in the first two winters and opens up entry points the builder never sealed. The Rouge River cuts through eastern Markham and delivers raccoons, skunks, and squirrels right into the backyards along Rouge River Estates. Milliken is rat territory — the dense mix of restaurants and food businesses along Steeles and McCowan feeds Norway rat populations that burrow under adjacent residential foundations. Angus Glen looks pristine, but the golf course is raccoon habitat and they do not stay on the fairways.
Our Ant Control Process in Markham
Inspection
The technician identifies the ant species from foragers, entry points, and nesting signs. Carpenter ants tunnel through wood. Pavement ants nest under slabs. Odorous house ants colonize near moisture. Correct ID determines every subsequent step.
Treatment
Professional ant baits are placed along foraging trails and carried back to the colony where they are shared with the queen. This eliminates the source. Surface sprays scatter workers and cause budding — the colony fragments into multiple colonies, making the problem significantly worse.
Prevention
Every gap around windows, doors, utility penetrations, and foundation cracks gets sealed. The technician flags moisture conditions and wood damage that attract carpenter ants, so you can address the root cause and prevent reinfestation.
Signs You Need Ant Control in Markham
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Lines of small ants trailing across kitchen counters and along baseboards
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Large black carpenter ants (10–15mm) appearing indoors during May and June
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Sawdust-like frass piling below window frames, baseboards, or door casings
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Ant hills appearing in lawn edges, garden beds, or along driveway cracks
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Live ants visible inside walls, behind baseboards, or near the hot water tank
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A sweet musty smell near ant trails — aggregation pheromone from a nearby colony
Why Hire a Professional in Markham
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Carpenter ants excavate wood to build nests. A colony inside a wall frame can cause thousands in structural damage before you notice. A pro locates the nest and eliminates it.
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Over-the-counter sprays kill workers on contact but never reach the queen. Professional baits are carried back to the colony — the only way to eliminate it.
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Different ant species require different baits and placement strategies. A pro identifies the species correctly before choosing a treatment.
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Carpenter ants are drawn to moisture-damaged wood. A technician identifies the moisture source and recommends fixes.
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Ant colonies split when disturbed — called budding. Spraying without baiting fragments the colony into multiple groups, making the problem far worse.
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