This Is Where Mice Thrive in Toronto According to an Exterminator

A mouse is seen gnawing on an electrical plug cable in this file photo. Shutterstock/torook

An exterminator company in the Greater Toronto Area has identified the top 10 intersections most impacted by mice infestations based on its recorded service requests and call volumes.

Pest control company GTA Exterminators says mice are becoming more common in Toronto, noting that it experienced an increase in mice-related calls between August 2024 and July 2025.

“The company reports that calls related to mice increased by 35% compared to last year, underscoring the growing rodent challenge facing the city,” an Aug. 29 news release says.

The Toronto intersections with the highest reported mouse activity according to GTA Exterminators include:

1. Caledonia Road & Rogers Road
2. Lawrence Avenue West & Avenue Road
3. Mount Pleasant Road & St. Clair Avenue East
4. O'Connor Drive & Woodbine Avenue
5. Don Mills Road & Eglinton Avenue East
6. Bloor Street West & Parkside Drive
7. Keele Street & Sheppard Avenue West
8. The Bridle Path & Lawrence Avenue East
9. Lawrence Avenue West & Bathurst Street
10. Yonge Street & Bloor Street

GTA Exterminators account manager John Voss says Toronto’s urban density and older infrastructure provide mice with the “perfect conditions” to thrive. He says the company is receiving more mice-related calls from busy intersections and residential areas than ever before.

“Once mice move in, they multiply quickly, which is why prevention and early action are critical,” the company says.

To prevent mice from getting in, GTA Exterminators advises residents and businesses to seal cracks and gaps around doors, windows, and utility lines. The company also recommends storing food in airtight containers, managing garbage securely, repairing leaks to eliminate water sources for mice, and reducing clutter where rodents might nest.

As mice can damage property and spread bacteria, GTA Exterminators recommends contacting a licensed pest control professional at the first sign of mouse activity to avoid “costly” infestations.

The company’s exterminators are licensed by the Ministry of Environment and specialize in residential and commercial pest control involving bed bugs, mice, rats, ants, flies, cockroaches, wasps, and numerous other pests, GTA Exterminators says.

For mice, the company says it begins the extermination process with a property inspection. Among techniques that it has found effective in dealing with infestation are commercial bait stations and mechanical traps.

City of Toronto

The City of Toronto says signs of a mouse infestation can include droppings, holes or burrows in the ground, or bite marks on wood, concrete, vegetables, or garbage containers.

To prevent mice, the city says to store garbage in animal-resistant containers; dispose of food waste in a green bin; remove clutter, construction debris, and garbage piles; and eliminate food sources such as fallen fruit, pet food left outdoors, and grass seed.

The city also recommends cutting tall grass and weeds and keeping areas around bird feeders and bird baths clean to keep mice away. Additionally, residents are advised to seal cracks and small holes around their house, garage, or shed to prevent mice from entering through the foundation and walls.

Those living on private property should contact a pest control service to manage a mouse infestation. Those living in apartments or multi-residential buildings are recommended to talk to their landlord, building owner, or property manager about the issue first, and contact 311 if the issues are not addressed.

The city says it uses “various methods to mitigate issues with rodents and to control their population in Toronto,” which includes addressing complaints about garbage or debris that attract rodents, or complaints about property owners or landlords not addressing rodent issues.

Additionally, the city says it investigates rodent complaints in food premises, including those in schools, hospitals, senior care facilities, and child care centres, and also maintains city facilities by keeping them free of garbage and debris and by making use of pest control services.