When the first hard freeze hits Spokane, the mice move in. With long winters, large amounts of undeveloped land at the city's edges, and plenty of older basements, garages and crawl spaces, the Inland Northwest has one of the more predictable rodent seasons in the country. Fall and early winter are the busiest times, but rodents are a year-round concern in the foothills and rural fringe.
Which rodents live around Spokane homes
Deer mice have white bellies, large eyes and big ears. They live in fields, woodpiles and sheds, and they move into cabins, garages and houses on the edge of town. They are known carriers of hantavirus, which is why Washington health agencies recommend careful cleanup methods. House mice are grayer and more common in town. Norway rats appear in older neighborhoods, near the river and downtown. Voles damage lawns and gardens under snow cover but rarely enter houses.
Why older homes and edge neighborhoods get hit
The South Hill, Browne's Addition, Manito and Perry District have houses built in the early and mid twentieth century. Stone foundations, old wooden window wells and holes where wires or pipes pass through foundation walls leave easy access. Homes near Palisades Park, along the Latah Creek corridor, at the base of Beacon Hill and on the edges of Mead and Nine Mile Falls neighbor open land, which means mice only have to travel a short distance. Snow insulation lets them roam in comfort, and heated garages are warm and quiet.
Signs you have visitors
- Droppings in drawers, cabinets or along the garage wall.
- Shredded paper, insulation or fabric tucked into corners.
- Gnaw marks on food packaging, stored bird seed or wiring.
- Scratching in walls or the attic, mostly at night.
- A musty odor near the source.
Removal and exclusion
A technician starts with the foundation, garage, attic and utility openings, since mice need only a pencil-wide gap. Traps and monitoring stations are placed along runways, and secured bait stations may be used outdoors. Sealing with steel wool, copper mesh, caulk or metal flashing follows. Providers may recommend a new garage door seal, screening for vents and repairs to damaged siding. For deer mouse infestations, cleaning should be done carefully: ventilate the room, wear gloves and a respirator, wet droppings with disinfectant before wiping, and never sweep or vacuum dry material.
Fall checklist for Spokane homeowners
- Walk the foundation and fill gaps larger than a pencil.
- Stack firewood on a rack at least a few feet from the house.
- Store pet food and birdseed in sealed metal bins.
- Keep garage doors closed, replace worn bottom seals and check weatherstripping.
- Declutter the garage and basement so any activity is easier to spot.
When to call
Droppings in the pantry, noises in the walls, or chewed wires are all reasons to act. Call (844) 725-1661 and PestMinistry will refer you to a licensed independent provider that serves Spokane. We are a referral line, so inspection, trapping and sealing are done by that provider.
Is it dangerous to clean up mouse droppings?
It can be, particularly with deer mice, so use wet-cleaning methods and protective gear.
Why do mice come indoors only in fall?
Falling temperatures and dwindling outdoor food push them to look for warmth.
Do mothballs or peppermint work?
They are not dependable and can create fumes you do not want in your home.
How long does a mouse job take?
Many cases need a few weeks of trapping plus sealing, depending on the size of the population.