The short version
Most yard treatments in Bellevue cost about $75–$200 per visit, or $350–$900 for a season. Removing standing water costs nothing and helps the most.
- A visit in Bellevue usually costs $75–$200.
- A full season usually runs $350–$900.
- Removing standing water is free and helps most.
- Ask what happens if bites return between visits.
- Compare plans by visits and products, not just price.
Anyone in Bellevue tired of mosquito bites at home.
What to look for
Mosquitoes breed in standing water, even a bottle cap's worth. In summer heat, eggs become biting adults in about a week. Around Bellevue, mosquito season runs from late May until the first frost. Often the source is a neighbor's yard or a storm drain.
- 1Corrugated downspout extensions that never drain.
- 2Welts on ankles and calves after yardwork.
- 3A neighbor's pool turning green and untended.
- 4Standing water in low spots a week after rain.
- 5Tarps, toys, or tires holding rainwater.
- 6Rain barrels without screens or lids.
Why it’s worth acting soon
- Each new generation is bigger than the last.
- Bites can spread West Nile virus.
- Itchy welts, especially for kids.
- Heartworm risk for dogs.
bite, to get protein for their eggsOnly female mosquitoesUS CDC in standing water, from a bottle cap to a pondMosquitoes breedUS EPA West Nile virus is the most common mosquito-borne disease in the U.S.Mosquito diseasesUS CDC 🧮
Estimate a season of mosquito control in Bellevue
Adjust for your situation to see a ballpark range.
Estimated range
A rough guide only. Your quote depends on your yard and how many visits you need.
Treatment options and typical costs
Property Inspection for Breeding Sites
$0–$150 (often bundled with a first treatment)
Most mosquitoes biting you in Bellevue were born within a few hundred feet of your door, so the inspection maps every container, drain, and puddle on the lot. That map becomes the treatment plan.
- Time
- 30–60 minutes
- Best for
- Every yard; finds where mosquitoes actually breed
Misting Systems and In2Care-Style Stations
misting $2,000–$4,500 installed plus refills; stations $200–$500 per season
Stations suit small Bellevue lots, townhome yards, and properties where the owner would rather not have spray. They work slowly, so pair them with source reduction.
- Time
- Misting: half a day. Stations: under an hour.
- Best for
- Specific yards: heavy outdoor use or spray-averse owners
Source Reduction and Larviciding
$75–$150 per visit
Larvicides used by licensed pros in Bellevue target mosquito larvae and are low in toxicity to pets, fish, and pollinators when used as the label directs. Ask which product is being used and why.
- Time
- 45–90 minutes
- Best for
- Yards with standing water, clogged gutters, ponds, or drains
Barrier (Residual) Yard Treatment
$75–$200 per visit; $350–$900 per season
A barrier treatment coats the undersides of leaves, shrubs, and shaded surfaces where adult mosquitoes rest during the day around your Bellevue home. Adults that land there pick up a lethal dose.
- Time
- 20–45 minutes per visit, repeated every 3–4 weeks
- Best for
- Shaded yards with shrubs, ivy, and dense landscaping
Prices are typical published ranges. Ask what’s included before you compare quotes.
Leaf-clogged gutters and downspouts hold water out of sight. Clearing them in fall means fewer places to breed in spring.What mosquito control costs in Bellevue.
- A typical home in Bellevue is worth around $1,200k, and a season of treatment costs far less than most outdoor projects. With a short season around Bellevue, most plans cover four or five visits. - Barrier (Residual) Yard Treatment: $75–$200 per visit; $350–$900 per season - Source Reduction and Larviciding: $75–$150 per visit - Misting Systems and In2Care-Style Stations: misting $2,000–$4,500 installed plus refills; stations $200–$500 per season - Property Inspection for Breeding Sites: $0–$150 (often bundled with a first treatment)
Local mosquitoes conditions in Bellevue.
Across Bellevue, the area is mostly urban, so mosquitoes pressure can differ from one block to the next depending on how tight the entry points are and how much food, water, or shelter is close by. An inspection in Bellevue usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Bellevue's seasonal timing lets you schedule treatment before the busy stretch rather than after it, which usually means faster service and a more accurate quote. A provider who works Bellevue and Washington every day can point out the specific conditions that matter most here, and getting the scope, price, and follow-up terms in writing makes it easier to compare options. Bellevue sits in a marine west coast climate, and that sets the pace for mosquito activity here: late spring through early fall; year-round in the deep south.
Mosquitoes that bite indoors usually slip in through gaps around doors or torn window screens.Which mosquitoes bite around Bellevue.
Floodwater mosquitoes hatch in big waves after heavy rain or snowmelt. They're the main West Nile carriers. They breed in storm drains. House mosquitoes (Culex) bite from dusk into the night. They can travel a long way from where they hatch.
Mosquito season in Bellevue.
The season is short, but numbers can spike after rain. West Nile cases usually peak in late summer.
A year of mosquitoes in Bellevue.
- Spring: clean gutters and dump water as snow melts. - Winter: store containers upside down and plan for spring. - Fall: the first frost ends the season. - Summer: short but busy in Bellevue. Watch for swarms after rain.
The weekly water walk.
- Tree holes: fill them with sand. - Gutters: clear leaves so water drains. - Saucers and pots: empty them or add sand. - Toys and buckets: store them upside down. - Tarps and covers: pull them tight so water runs off. - Birdbaths: change the water twice a week. - Pet bowls: refresh daily. - AC drip lines and downspouts: make sure water drains away.
Avoiding bites.
- Timing: tiger mosquitoes bite by day; house mosquitoes at dusk. - Repellent: DEET, picaridin, IR3535 or oil of lemon eucalyptus. - Clothing: long sleeves and pants help at dusk. - Fans: a patio fan keeps weak-flying mosquitoes away. - Screens: repair holes in window and door screens.
Low-cost ways to cut mosquitoes.
- Lights: yellow bug lights attract fewer insects to the porch. - Mosquito dunks: Bti tablets kill larvae in rain barrels and ponds. - Mosquito fish: they eat larvae in ornamental ponds. - Pumps and fountains: moving water breeds far fewer mosquitoes. - Trimming: thin out dense shrubs and tall grass.
Mosquito or look-alike?
- Mosquitoes: slim, long legs, and a needle-like mouth. - Crane flies: look like giant mosquitoes. They don’t bite. - Non-biting midges: swarm near water at dusk. Harmless, just annoying. - No-see-ums: tiny biting gnats near marshes. Screens need a finer mesh.
When a bite needs a doctor.
See a doctor for high fever, stiff neck or confusion. About one in five get a fever, headache or body aches. Most people infected with West Nile virus never feel sick. Most bites just itch for a few days. Spreading swelling or an infected-looking bite needs a check too.
Protecting your pets.
Talk to your vet about year-round prevention. Heartworm reaches dogs through mosquito bites, and cats can get it as well; Bellevue's June–October season is long enough that most vets advise year-round prevention. Refresh pet water bowls daily, dump saucers after Bellevue's summer storms, and keep animals inside until a yard treatment dries.
What a treatment visit looks like.
Then they spray shady shrubs, where adults rest. Larvicide goes in water you can't drain. They dump or treat standing water. The tech walks the yard first. A visit usually takes 20 to 45 minutes. Most plans repeat every three to four weeks.
Rain barrels and ponds.
- Pool covers: drain standing water after rain. - Barrels: cover openings with fine mesh. - Ponds: fish and moving water keep larvae down. - Bird baths: change the water every few days. - Gutters: clear them so water drains away. - Tarps: shake out any that hold rainwater.
Questions to ask before you sign.
- When can kids and pets go back outside? - What product will you spray? - How often will you come? - Do you treat standing water too? - What happens if bites come back between visits? - How do you protect bees and flowers?
Ways to keep the cost down.
- Book early. Spring sign-ups sometimes cost less. - Dump standing water every week. It’s free and works. - Trim dense shrubs so fewer adults can rest there. - Ask about a shorter plan for peak months only. - Compare what each plan includes, not just the price.
What affects the price
- Standing water requiring larvicide.
- Gutter cleaning or drainage fixes bundled in.
- Re-treatment policy between scheduled visits.
- In2Care-style station count and servicing.
- Ponds, creeks, or wetland edges on the property.
- Synthetic versus botanical barrier products.
- Lot size and total acreage treated.
- Number of visits the local season needs.
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What's your biggest concern about mosquito control costs?
When to call for help
early in the season, before the first big wave. Ponds, drains and dense shrubs are hard to handle yourself. Call if bites still keep you indoors. Dumping water should come first.
What you can do yourself
They also spray where adults rest, every few weeks. A pro adds larvicide for water you can't drain. Use repellent and run a fan on the patio. The biggest win is free: dump standing water every week.
Mosquitoes in Bellevue
In denser parts of Bellevue, storm drains, catch basins and gutters are big breeding spots. Summer highs around 76°F in Bellevue speed up the life cycle, and average humidity near 73% keeps adults active. With about 40 inches of rain a year in Bellevue, any container left out will hold water within days.
Local research
Mosquitoes in Bellevue, WA: what the public record shows
Before you compare quotes, it helps to know which mosquitoes actually live in Washington, when they are busiest around Bellevue, and what the state figures look like. Everything below links to the agency or university page it came from.
West Nile neuroinvasive disease cases, 2024
Neuroinvasive counts are the most reliable state comparison because nearly all severe cases are diagnosed and reported.
CDCWhen mosquitoes are busiest around Bellevue
Washington DOH: detections from May (earliest) to October (latest). California reports its heaviest WNV activity in late summer; CDC peak is late August to early September.
Rules that apply in Washington
For context, nationally
- 1,808 — West Nile virus disease cases reported, 2024. CDC
- 1,347 (75% of cases); 173 deaths — West Nile neuroinvasive disease cases, 2024. CDC
Sources: CDC; Washington State Department of Health. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep mosquitoes away
- Trim shrubs and ivy to reduce resting cover.
- Tighten lids on trash and recycling bins.
- Screen or lid every rain barrel.
- Replace corrugated downspout extensions with smooth pipe.
- Empty plant saucers after every rain.
- Rake leaf litter from shaded beds.
When you compare quotes, look at the season total, how many visits it covers and what happens if the bites come back.Did you know?
A female's wings beat hundreds of times per second
Larvae are called wrigglers; pupae are tumblers
Questions people ask
How much does a single mosquito treatment cost?
Usually $75–$200 per visit. Bigger or shadier yards cost more.
Does lot size really change the price that much?
Yes. More yard and more shrubs mean more product and more time.
Is a misting system worth the cost?
Regular spraying and source removal usually do the job. Installation runs into the thousands, plus refills. Rarely, for most yards.
Do companies charge extra for re-treatments between visits?
Ask before you sign. Others charge. Some include a free re-spray within a set window.
When should mosquito treatments start each year?
Before the first big wave. Around Bellevue, the season runs from late May until the first frost, so start a few weeks before.
What should I do before the pro arrives?
Tell them where you get bitten most. Move toys and pet bowls. Dump standing water.
What does a mosquito inspection involve?
Gutters, saucers, tarps and low spots get checked first. They also check shady spots where adults rest. The tech walks the yard looking for standing water.
Should I worry about West Nile virus?
Across Bellevue, yes, mosquitoes can transmit West Nile virus and other diseases, so control is about reducing both the nuisance and the risk. West Nile virus is the most common mosquito-borne disease in the U.S.
When is mosquito season in Bellevue?
It runs from late May until the first frost. Evening biters are usually house mosquitoes.
Do mosquitoes in Bellevue carry West Nile?
Repellent and dumping standing water are your best protection. Cases usually peak in late summer. West Nile is found in every lower-48 state, Washington included. They can.
Nearby cities
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Sources (10)
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 Mosquito Exterminator · Updated September 11, 2026 · How we write these guides