Mosquito Control in Markham
Professional mosquito 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 Mosquito Control Process in Markham
Inspection
The technician inspects the property for all mosquito breeding sources: clogged eavestroughs, plant saucers, tarps, wheelbarrows, bird baths, pond edges, low spots in the lawn, and catch basins. Every source found is treated with larvicide or flagged for drainage.
Treatment
Bti granules or briquettes are applied to standing water that cannot be drained: catch basins, ponds, decorative water features, and low areas. A residual insecticide is applied to vegetation, shrubbery, and shaded areas around the property perimeter where adult mosquitoes rest during the day.
Prevention
Treatments are scheduled every 4 weeks during mosquito season (May–September). Each treatment reduces the active mosquito population for 3–4 weeks. Starting in May, before the first generation establishes, is the most cost-effective approach.
Signs You Need Mosquito Control in Markham
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Mosquitoes biting during daytime hours, not just at dusk — indicates a heavy local population
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Mosquitoes concentrated in specific areas of the yard: under decks, near garden beds, around water features
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Visible standing water that has not drained after 3–4 days
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Clogged eavestroughs or gutters holding stagnant water on the roofline
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Mosquito activity starting earlier in spring and lasting later into fall than in previous years
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Clusters of mosquitoes resting on the underside of deck railings and patio furniture during the day
Why Hire a Professional in Markham
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DIY mosquito foggers treat the air, not the source. Mosquitoes return within hours when the fog dissipates. Professional larvicide treatment addresses the actual breeding population.
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GTA properties near ravine systems have continuous mosquito pressure from natural breeding sites on public land. A professional treats the private property sources that homeowners miss.
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Barrier treatments by professionals use products with longer residual effect than retail alternatives, lasting 3–4 weeks instead of hours.
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Culex mosquitoes, the most common GTA species, can carry West Nile Virus. While the risk in Ontario is low, reducing mosquito populations is the only effective prevention.
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Professional mosquito programs include catch basin treatment, the single most effective intervention for reducing urban mosquito populations in the GTA.
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