How to Get Rid of Mice in Calgary: Complete 2026 Guide
Mice are the #1 winter pest problem in Calgary homes. When temperatures drop below freezing — usually by late October — mice actively seek warm shelter, and your home is exactly what they're looking for. A single pair of mice can produce up to 60 offspring in a year, so what starts as one scratching sound in the wall can become a full infestation within weeks.
This guide walks you through everything Calgary homeowners need to know: how to identify mice, the real costs of professional treatment, DIY methods that work (and ones that don't), and how to keep mice out for good.
Signs You Have Mice in Your Calgary Home
Mice are nocturnal and secretive — you'll usually notice the signs before you ever see the animal. Watch for:
- Scratching or scurrying sounds in walls, ceilings, or under floors — especially at night between 9 PM and 2 AM
- Droppings — dark, rice-sized pellets (3-6mm) found in kitchen drawers, pantries, under sinks, and along baseboards
- Greasy rub marks along walls and baseboards (mice follow the same paths and leave body oil behind)
- Chewed wires, cardboard, or food packaging — mice gnaw constantly to keep their teeth from overgrowing
- A musky, ammonia-like smell in enclosed spaces like closets or cupboards
- Nests made of shredded paper, fabric, or insulation in hidden areas
- Unusual pet behavior — dogs or cats staring intently at walls, cabinets, or appliances
If you notice any two of these signs, you almost certainly have an active infestation that needs immediate attention.
Why Mice Love Calgary Homes
Calgary's climate makes mouse problems nearly inevitable for most homeowners. Our long, cold winters (November through March) drive mice indoors, and our rapid development in new communities like Auburn Bay, Mahogany, and Cranston displaces field mice from their natural habitats — straight into nearby homes.
Common mouse entry points in Calgary homes:
- Gaps around pipes and utility lines entering the foundation
- Weep holes in brick veneer (mice can squeeze through gaps as small as a dime — 6mm)
- Gaps under garage doors and exterior doors
- Cracks in foundation walls and concrete
- Vents and exhaust openings without proper screens
- Attached garage interiors (mice enter the garage, then find their way into the house)
How Much Does Mouse Control Cost in Calgary? (2026 Pricing)
Professional mouse control in Calgary typically costs between $300 and $600 for a standard residential treatment, depending on the size of your home and the severity of the infestation. Here's what that includes:
| Service | What's Included | Typical Cost | |---|---|---| | Inspection & Assessment | Full interior + exterior inspection, entry point identification | $0 (included with treatment) | | Standard Home Treatment | Trapping, bait stations, entry point sealing, 1 follow-up visit | $300 - $450 | | Severe Infestation | Multiple visits, extensive trapping, exclusion work, monitoring | $450 - $600+ | | Ongoing Prevention | Quarterly exterior bait stations and monitoring | $75 - $150/quarter |
At Calgary Pest Guard, all mouse control services include a 100% satisfaction guarantee — if mice return within the warranty period, we re-treat at no additional cost.
DIY Mouse Control: What Works and What Doesn't
Methods That Actually Work
- Snap traps — The most effective DIY method. Place traps along walls where you've seen droppings, with the trigger end facing the wall. Use peanut butter or chocolate as bait (not cheese — that's a myth).
- Seal entry points — Use steel wool, copper mesh, or silicone caulk to fill gaps. Mice can't chew through steel wool.
- Eliminate food sources — Store all food in airtight glass or hard plastic containers. Clean up crumbs and spills immediately. Don't leave pet food out overnight.
- Reduce clutter — Mice nest in clutter. Keep storage areas organized and off the floor.
Methods That Don't Work (or Make Things Worse)
- Ultrasonic repellents — Studies show these have no meaningful effect on mice. Don't waste your money.
- Peppermint oil — While mice dislike the smell, it doesn't drive them out of an established nest. Ineffective for real infestations.
- Glue boards — Inhumane, and mice often avoid them. Not recommended.
- Poison bait indoors — Mice die in walls and ceilings, creating terrible odors and attracting other pests. Professional bait stations are designed to avoid this.
When to Call a Professional
DIY methods can handle a single mouse caught early, but you should call a professional if:
- You've seen multiple mice or found extensive droppings in several areas
- The scratching sounds are persistent and coming from inside walls or ceilings
- You've tried traps for 2+ weeks with no reduction in activity
- You have children or pets and are concerned about safe bait placement
- You want to prevent mice from returning (professional exclusion work is far more effective than DIY sealing)
Professional treatment is faster, safer, and comes with a guarantee — which means peace of mind that the problem is actually solved, not just temporarily reduced.
How to Prevent Mice from Coming Back
The key to long-term mouse prevention is exclusion — sealing your home so mice can't get in. After any treatment, professional or DIY, take these steps:
- Seal all exterior gaps — Walk around your home and seal every gap wider than 6mm. Pay special attention to where pipes, wires, and vents enter the house.
- Install door sweeps on all exterior doors, including the garage. If you can see daylight, a mouse can get in.
- Keep firewood at least 20 feet from the house and elevated off the ground. Firewood piles are prime mouse nesting habitat.
- Trim vegetation — Keep shrubs and branches at least 12 inches away from your home's exterior. Mice use overgrown plants as a bridge to your house.
- Store garbage in sealed bins with tight-fitting lids, away from the house.
- Consider quarterly exterior bait stations — These intercept mice before they enter your home. Calgary Pest Guard offers affordable ongoing prevention plans.
Calgary Pest Guard Mouse Control Service
Our mouse control service is designed for Calgary homes and our unique climate challenges:
- Same-day or next-day response — We know mice problems can't wait
- Licensed, insured technicians with experience in Calgary construction styles
- Safe, family-and-pet-friendly methods — No dangerous indoor poisons
- Full exclusion work — We don't just trap mice; we seal them out
- 100% satisfaction guarantee — If mice return within the warranty period, we come back free
- Service across Calgary and Southern Alberta — Including Airdrie, Cochrane, Chestermere, Okotoks, Strathmore, and High River
Ready to Get Rid of Your Mice?
Don't wait for the problem to get worse. Mice reproduce rapidly, and a small problem today can be a major infestation in two weeks.
Call (825) 760-5364 or book an appointment online for a free inspection and quote. We respond fast — usually same day.
Calgary Pest Guard — Protecting your peace of mind, 100% guaranteed.