Cost Guide
Ant Extermination Cost in Toronto
Ant extermination in Toronto costs between $200 and $450 depending on the ant species and the treatment type required, with a single-visit interior bait treatment for pavement ants starting around $200 and a carpenter ant perimeter treatment on a large detached home reaching the upper end. A $75–$150 inspection is waived when treatment is booked the same day.
Ant pricing in Toronto reflects the city's mix of pavement ants in older driveways and walkways, pharaoh ants in multi-unit buildings, and carpenter ants in mature-tree neighbourhoods where nests in decaying wood require both interior baiting and exterior perimeter treatment. Every service includes a written 90-day guarantee with a free follow-up if activity returns after the initial treatment.
Last updated September 10, 2026
Price Table
| Service | Cost | Details |
|---|---|---|
| Inspection (waived with treatment) | $75–$150 | Species ID + trail mapping |
| Interior bait treatment (pavement/pharaoh ants) | $200–$300 | Gel + granular bait, 1 follow-up |
| Perimeter treatment (carpenter ants) | $300–$400 | Bait + non-repellent spray, 3 m band |
| Full interior + perimeter (severe) | $400–$450 | Both treatments + nest search |
| Additional follow-up visit (beyond guarantee) | $150–$200 | Per visit if re-booked after 90 days |
| 90-day written guarantee | Included | Free follow-up if activity returns |
What Drives the Cost
Ant species is the primary cost driver because pavement and pharaoh ants respond to a single interior bait placement, while carpenter ants nest in wood and require both interior baiting and an exterior perimeter treatment to reach the colony. Species identification at the inspection determines the bait formulation and the treatment scope.
Treatment type raises the price. An interior-only bait treatment costs less than a full perimeter spray that covers up to three metres from the foundation, and a severe infestation needing both interior bait and exterior perimeter work sits at the top of the range. The size of the perimeter band scales with property size.
Property size and severity affect cost. A small condo with a single ant trail costs less than a large detached home with multiple foraging paths, and a long-standing carpenter ant colony that has nested in structural wood requires a nest search and more product than a fresh pavement ant trail.
Follow-up visits and access difficulty round out the price. The standard service includes one follow-up within the 90-day guarantee, but a crawlspace, dense landscaping, or a locked side yard that needs special access adds labour time. Easy ground-level access keeps the price at the bottom of the range.
What Affects the Price Locally
Toronto's mature urban canopy supports carpenter ant colonies in older trees and decaying structural wood, which often requires both interior baiting and exterior perimeter treatment and raises the cost above a simple pavement ant job. Older housing stock with settled foundations and gaps around pipe penetrations gives ants easy interior access, increasing the number of entry points to seal.
Multi-unit buildings with pharaoh ants frequently need coordinated treatment of adjacent suites because the colonies bud and spread through shared walls, adding to the total. Condo and co-op boards may require after-hours access or proof of insurance for perimeter spraying. Winter access has limited impact on interior ant work, but exterior perimeter treatments are best scheduled in warmer months when ants are actively foraging and sealants cure properly.
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