Hornet Removal in Markham
Professional hornet removal 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 Hornet Removal Process in Markham
Inspection
The technician locates the nest, identifies the species, and evaluates the size. Bald-faced hornets build grey paper nests in trees and on building exteriors. European hornets nest in wall voids and hollow trees. Nest size and species determine the treatment method.
Treatment
Professional insecticide dust is injected directly into the nest entrance. The dust clings to hornets as they exit and enter, spreading through the colony including the queen. This eliminates the entire colony within 24–48 hours. Nests are then removed to prevent reuse by other wasps the following season.
Prevention
For wall-void nests, the entry hole is sealed after treatment to prevent future colonies from using the site. The technician inspects the surrounding area for other potential nesting sites and treats them preventively with residual insecticide.
Signs You Need Hornet Removal in Markham
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Large grey, papery nests attached to tree branches, under eaves, or on building exteriors — can reach the size of a basketball
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Large black and white hornets flying aggressively near a specific area of the property
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Aerial wasps or hornets entering and exiting a gap in the siding, soffit, or roofline
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Increasing hornet activity around outdoor eating areas and garbage bins in mid to late summer
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Hornet bodies accumulating below a specific spot — indicates a nest above
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Distinctive loud buzzing from inside a wall or hollow tree — a hidden wall-void nest
Why Hire a Professional in Markham
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Hornets defend their nest aggressively and can sting repeatedly. For anyone with a bee sting allergy, a hornet encounter near a nest is a medical emergency.
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Wall-void hornet nests are invisible from outside. DIY sprays applied to the entry hole are rarely effective and drive the colony deeper into the wall structure.
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Insecticide dust is the only effective treatment for hornet nests. Aerosol sprays cannot reach deep into the nest structure. Professionals use injection equipment designed for this application.
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Bald-faced hornet colonies can reach 700 members by late August. A nest that seems small in June can be a serious hazard by late summer.
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Proper hornet removal includes nest removal, which prevents secondary infestations from other wasps using the same structure the following season.
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