The short version
Rodent control in Kent, Washington means handling roof rats in attics and Norway rats under decks all year, plus deer mice that carry hantavirus. Washington logs one to five hantavirus cases yearly, and roughly a third have been fatal. Seal gaps of 1/4 inch or more, trap the rodents inside, and never sweep droppings.
- Roof rats and Norway rats stay active year-round in Kent.
- Infected deer mice live throughout Washington.
- Rats enter through 1/4-inch holes and chew them larger.
- Wet droppings with bleach and wait five minutes before wiping.
This guide is for Kent homeowners with attic noises or crawl space droppings, renters who need to report a problem, and business owners with storage areas.
What to look for
Four rodents matter in Kent. Roof rats nest high in attics and dense vegetation, a familiar Puget Sound pattern. Norway rats burrow under decks and foundations. House mice nest in walls and kitchens. Deer mice live in fields and outbuildings, and Washington health officials say infected ones are found statewide. Washington Department of Fish and Wildlife adds that rats start breeding at three to four months old.
- 1Scratching in the attic at night, typical of roof rats.
- 2Burrows under decks or porches, pointing to Norway rats.
- 3Tracks about half an inch long in dust near entry points.
- 4Gnawed wood or wiring around vents and pipes.
- 5Droppings in a shed that sat closed for months.
Why it’s worth acting soon
- Six to ten young per litter means rat numbers climb fast.
- Deer mouse droppings can carry hantavirus, fatal in about one in three Washington cases.
- Rat incisors grow about five inches a year, so the gnawing never stops.
- Soiled crawl space insulation usually has to come out.
52%Western homeowners who have ever had a rodent encounter, NPMA and Harris Poll, September 2022 (lifetime)NPMA and The Harris Poll Treatment options and typical costs
Exclusion and crawl space sealing
Quoted after inspection
Gaps of 1/4 inch or more at the foundation, vents, pipes and roofline get hardware cloth, flashing and steel wool, with extra attention under decks where Norway rats dig.
- Time
- One or two visits
- Best for
- Decks, crawl spaces, attics
Trapping program
Quoted after inspection
Snap traps run along attic, crawl space and garage runways with scheduled checks. Washington does not regulate Old World rats, so trapping them is unrestricted.
- Time
- Two to four weeks
- Best for
- Rats or mice inside
Hantavirus-safe cleanup
Quoted after inspection
Droppings and nests are soaked with bleach solution, left to sit, then bagged with gloves on, and soiled insulation comes out. It matters most where deer mice nested.
- Time
- A few hours to a day
- Best for
- Sheds, garages, crawl spaces
Prices are typical published ranges. Ask what’s included before you compare quotes.
Crawl spaces are where rats and mice get comfortable. Vent screens, the sill plate and any gap around pipes are worth a careful look.How seriously should Kent residents take hantavirus?
Seriously enough to change how you clean, but not enough to panic. Washington records one to five hantavirus cases a year, and roughly a third of diagnosed patients have died. Infected deer mice live throughout the state, including around Kent. The riskiest task is cleaning a closed-up shed or garage in spring. Ventilate for 30 minutes, soak droppings with bleach solution for five minutes, and wipe up with gloves. If fever or breathing trouble follows, see a doctor and mention the exposure.
Roof rats in Puget Sound attics.
Roof rats are a familiar attic rodent around Puget Sound, and Kent homes are no exception. They run branches and utility lines to the roof, then slip through a 1/4-inch gap, which state wildlife officials say they chew larger. With winter lows near 36 degrees, roof rats never need to leave a warm attic and keep breeding. A good plan pairs metal roofline sealing with trimmed branches and traps along rafters, and the provider should show you each opening.
A good inspection starts outside at ground level: door thresholds, the joint between siding and foundation, and anywhere a pipe or cable enters.Why Kent's mild, wet winters keep rats breeding.
About 39 inches of rain keeps soil soft for Norway rat burrows under decks and beside sheds, and wet burrows push rats into drier crawl spaces. Check for burrows each spring and fall, because a March problem can be a large one by October. In colder cities, winter slows rats down. In Kent it barely does, because lows near 36 degrees and steady rain keep food and cover available. Young rats breed at three to four months, so the cycle repeats without a break.
Sealing is the part that lasts in Kent.
A mouse fits through a gap the width of a pencil, and a rat through a quarter-sized hole, so the inspection should map every opening — around pipes, under doors, and where utilities enter. In Kent, WA, 39 inches of rain a year and 74% humidity keep exterior wood soft, so gaps open again seasonally and need re-checking. Traps and bait remove the rodents you have; sealing removes the ones that would come in next.
What rodent control costs in Kent.
Rodent control is priced by the size of the job: how many entry points need sealing, how much baiting and trapping the colony needs, and whether a cleanup is involved. A simple kitchen mouse job is at the low end; a multi-floor rat colony with a sanitation cleanup is at the high end. In Kent, WA, the timing matters too — most activity starts in fall as 36°F winter lows push rodents indoors, which is when providers are busiest. Ask for the sealing and the trapping as separate line items, and what the re-service covers.
What affects the price
- Crawl space access and condition.
- Entry points along the foundation, vents and roofline.
- Which rodents are involved, deer mice included.
- How much insulation is soiled.
- Cleanup in sheds, garages or outbuildings.
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What's your biggest concern about rodents?
When to call for help
In Kent, also call before cleaning heavy mouse droppings if deer mice may be involved, given Washington's hantavirus record. Ask the provider to list each entry point and explain how cleanup will be handled. Call a professional if you hear rats in the attic, find burrows under the deck, or keep catching rodents after two weeks.
What you can do yourself
Rats in a Kent attic or crawl space are harder, because openings sit high on the roofline or low under decks. Heavy droppings in a shed are the other reason to hire help. A house mouse or two in the kitchen is a fine DIY job with snap traps and steel wool, and Washington leaves rat trapping unrestricted.
Rodents in Kent
About 39 inches of rain a year and humidity near 74 percent keep soil damp and vegetation dense at roughly 46 feet of elevation, which suits burrowing Norway rats. With a median home value near $550,000, insulation, wiring and crawl spaces are worth protecting. Kent was founded in 1890 and has grown into a city of about 134,000 people in the Seattle south metro, known as a distribution hub. The marine west coast climate is mild, with summer highs near 77 degrees and winter lows around 36, so both rat species stay active year-round. In Kent, comparing a couple of written quotes side by side is the easiest way to see what is actually included, because the scope, prep steps, and follow-up terms vary a lot between providers. Most providers include a follow-up visit in the plan, but the terms differ, so ask exactly what is covered and for how long before you decide.
Local research
Rodents in Kent, WA: what the public record shows
Before you compare quotes, it helps to know which rodents actually live in Washington, when they are busiest around Kent, and what the state figures look like. Everything below links to the agency or university page it came from.
Rat litter size
Old World rats are not regulated; killing is unrestricted.
WDFWRat entry hole
Footprint about 1/2 inch long; incisors grow 5 inches a year.
WDFWRodent species recorded in Washington
- House mouse (Mus musculus) — Enters at 1/4 inch; 5-10 litters per year; eats about 200 small meals a night.
- Norway rat (Rattus norvegicus) — Burrowing rat of basements, sewers and ground floors; tail shorter than head plus body.
- Roof rat (Rattus rattus) — Climber of attics and trees in warm and coastal regions; tail longer than head plus body.
- Deer mouse (Peromyscus maniculatus) — Primary U.S. hantavirus carrier; lives throughout Washington and the interior West.
When rodents are busiest around Kent
Year-round; roof rats in Puget Sound attics.
Rules that apply in Washington
For context, nationally
- 1/4 inch (the width of a pencil) — Smallest gap a mouse can enter. CDC
- 890; 35% fatal; 94% west of the Mississippi — Hantavirus cases reported since 1993 (through 2023). CDC
Sources: Hantavirus; WDFW; CDC; Pest Notes: House Mouse; Pest Notes: Rats. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep rodents away
- Cover crawl space vents with hardware cloth and replace torn screens.
- Bury hardware cloth along deck and porch edges.
- Trim limbs and vegetation back from the roof.
- Store pet food and chicken feed in metal containers.
- Keep compost in enclosed bins and pick up fallen fruit.
- Air sheds out for 30 minutes before spring cleanup.
Before you call, sketch where you have seen droppings or heard noise and measure any gaps you found. It makes the first visit faster and the quotes comparable.Did you know?
Rat incisors grow about five inches a year, which is why rats gnaw constantly.
A rat footprint is about half an inch long, a handy clue in dust near entry points.
Washington was one of 11 states with a provisional hantavirus case among the 17 counted for 2025.
Questions people ask
Is hantavirus a risk in Kent, Washington?
The Washington State Department of Health reports one to five cases a year, about a third fatal, and infected deer mice live statewide, Kent included. Wet cleaning of droppings is essential. Yes, though cases are uncommon.
Do rats stay active in winter in Kent?
Kent winter lows average around 36 degrees, mild enough that roof rats and Norway rats keep breeding. With six to ten young per litter after roughly three weeks, a winter colony keeps growing. Yes.
Is it legal to trap or kill rats in Washington?
Washington Department of Fish and Wildlife says Old World rats, meaning Norway and roof rats, are unregulated and killing them is unrestricted. Native deer mice are a separate category, so ask a provider how those are handled. Yes.
How do I safely clean up mouse droppings in a shed?
Spray droppings and nests with 1.5 cups of bleach per gallon of water until soaked, wait five minutes, then wipe up with gloves and bag everything. Never sweep or vacuum. Let the shed air out for 30 minutes.
Why do rats get under decks and into crawl spaces?
Crawl space vents then offer sheltered nesting with insulation. Buried hardware cloth at deck edges and screened vents block both routes. Norway rats are burrowers, and damp soil under a deck or along a foundation is easy to dig.
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Sources (6)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Rodent Exterminator · Updated October 11, 2026 · How we write these guides