The short version
Most yard treatments in Washington cost about $75–$200 per visit, or $350–$900 for a season. Removing standing water costs nothing and helps the most.
- A visit in Washington 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 Washington 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 Washington, mosquito season runs from about May through September. Often the source is a neighbor's yard or a storm drain.
- 1Rain barrels without screens or lids.
- 2Corrugated downspout extensions that never drain.
- 3A neighbor's pool turning green and untended.
- 4Bites getting worse after each wet spell.
- 5Ornamental pond with no fish or pump.
- 6Welts on ankles and calves after yardwork.
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 Washington
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)
The inspector checks resting spots too: dense shrubs, ivy, under decks, and shaded fence lines around your Washington home. Knowing where adults hide shows where barrier spray matters.
- Time
- 30–60 minutes
- Best for
- Every yard; finds where mosquitoes actually breed
Source Reduction and Larviciding
$75–$150 per visit
This visit often doubles as homeowner coaching, since most breeding sites on a Washington lot can be eliminated by hand. A pro points them out so they stay gone.
- 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
Most programs use a pyrethroid spray from a backpack mister. It fades over three to four weeks. Repeat visits keep the coverage up through the season.
- Time
- 20–45 minutes per visit, repeated every 3–4 weeks
- Best for
- Shaded yards with shrubs, ivy, and dense landscaping
Misting Systems and In2Care-Style Stations
misting $2,000–$4,500 installed plus refills; stations $200–$500 per season
Stations suit small Washington 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
Prices are typical published ranges. Ask what’s included before you compare quotes.
A treatment visit covers the shaded plants and beds where adults rest, along with any standing water that can't be drained.What mosquito control costs in Washington.
- A typical home in Washington is worth around $685k, and a season of treatment costs far less than most outdoor projects. With a season running from about May through September around Washington, most plans cover five or six visits. - Property Inspection for Breeding Sites: $0–$150 (often bundled with a first treatment) - Source Reduction and Larviciding: $75–$150 per visit - Barrier (Residual) Yard Treatment: $75–$200 per visit; $350–$900 per season - Misting Systems and In2Care-Style Stations: misting $2,000–$4,500 installed plus refills; stations $200–$500 per season
Local mosquitoes conditions in Washington.
Washington sits in a humid subtropical climate, and that sets the pace for mosquito activity here: late spring through early fall; year-round in the deep south. In Washington, 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 Washington usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Washington'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 Washington and District of Columbia 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.
Mosquitoes that bite indoors usually slip in through gaps around doors or torn window screens.Which mosquitoes bite around Washington.
Asian tiger mosquitoes are common around Washington. They're black-and-white and bite by day. They breed in small containers. House mosquitoes (Culex) bite from dusk into the night. They breed in storm drains. They're the main West Nile carriers.
Mosquito season in Washington.
Numbers usually peak in July and August. West Nile cases usually peak in late summer.
A year of mosquitoes in Washington.
- Spring: dump water and clean gutters before May. - Summer: peak season in Washington, especially July and August. - Fall: activity fades with cooler nights. - Winter: fix drainage and store containers upside down.
The weekly water walk.
- 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. - Tree holes: fill them with sand.
Avoiding bites.
- 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. - Timing: tiger mosquitoes bite by day; house mosquitoes at dusk.
Low-cost ways to cut mosquitoes.
- 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. - Lights: yellow bug lights attract fewer insects to the porch.
Mosquito or look-alike?
- 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. - Mosquitoes: slim, long legs, and a needle-like mouth.
When a bite needs a doctor.
Most bites just itch for a few days. Most people infected with West Nile virus never feel sick. About one in five get a fever, headache or body aches. See a doctor for high fever, stiff neck or confusion. Spreading swelling or an infected-looking bite needs a check too.
Protecting your pets.
Dogs get heartworm from mosquito bites. Cats can too. Ask your vet about year-round heartworm prevention. Change pet water bowls daily. Keep pets inside while a yard spray dries.
What a treatment visit looks like.
A visit usually takes 20 to 45 minutes. The tech walks the yard first. They dump or treat standing water. Larvicide goes in water you can't drain. Then they spray shady shrubs, where adults rest. Most plans repeat every three to four weeks.
Rain barrels and ponds.
- 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. - Pool covers: drain standing water after rain.
Questions to ask before you sign.
- 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? - When can kids and pets go back outside?
Ways to keep the cost down.
- 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. - Book early. Spring sign-ups sometimes cost less.
What affects the price
- Travel distance from the company's base.
- Re-treatment policy between scheduled visits.
- Standing water requiring larvicide.
- In2Care-style station count and servicing.
- Commercial or multi-unit property.
- Synthetic versus botanical barrier products.
- Gutter cleaning or drainage fixes bundled in.
- One-time visit versus a seasonal plan.
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What's your biggest concern about mosquito control costs?
When to call for help
Call if bites still keep you indoors. Dumping water should come first. early in the season, before the first big wave. Ponds, drains and dense shrubs are hard to handle yourself.
What you can do yourself
The biggest win is free: dump standing water every week. Use repellent and run a fan on the patio. A pro adds larvicide for water you can't drain. They also spray where adults rest, every few weeks.
Mosquitoes in Washington
With about 40 inches of rain a year in Washington, any container left out will hold water within days. Summer highs around 89°F in Washington speed up the life cycle, and average humidity near 66% keeps adults active. In denser parts of Washington, storm drains, catch basins and gutters are big breeding spots.
Local research
Mosquitoes in Washington, DC: what the public record shows
Before you compare quotes, it helps to know which mosquitoes actually live in District of Columbia, when they are busiest around Washington, 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 Washington
CDC: West Nile transmission June through October, peaking late August to early September. Illinois found its first positive mosquito batch of 2025 on May 9, so larval control should start in May.
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. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep mosquitoes away
- Book barrier treatments before the season starts.
- Screen or lid every rain barrel.
- Drop Bti dunks in water you cannot drain.
- Wear DEET or picaridin repellent outdoors.
- Fix low spots that hold water for days.
- Add fish or a pump to ornamental ponds.
Jot down where you found standing water and when you get bitten. It gives a pro a head start.Did you know?
Over 3,500 mosquito species exist worldwide
Some species' eggs survive dry for months
Questions people ask
Do companies charge extra for re-treatments between visits?
Some include a free re-spray within a set window. Others charge. Ask before you sign.
How much does a single mosquito treatment cost?
Usually $75–$200 per visit. Bigger or shadier yards cost more.
What does a seasonal mosquito plan cost?
Usually $350–$900 for the season. Around Washington, the season runs from about May through September, which sets how many visits you need.
Are there cheaper options than a full seasonal plan?
Yes. Remove standing water weekly. Use repellent. Run a patio fan. A one-time spray before an event also helps.
What if the mosquitoes are coming from my neighbor's property?
That's common. Treat your own yard and talk to your neighbor. Your local mosquito control district or health department can also help.
What are In2Care stations and do they work?
They're small water traps. Mosquitoes visit, then carry larvicide to other water. They work best against container breeders like tiger mosquitoes.
What should I do before the pro arrives?
Dump standing water. Move toys and pet bowls. Tell them where you get bitten most.
When is mosquito season in Washington?
It runs from about May through September. Daytime biters are tiger mosquitoes; evening biters are usually house mosquitoes.
Do mosquitoes in Washington carry West Nile?
They can. West Nile is found in every lower-48 state, District of Columbia included. Cases usually peak in late summer. Repellent and dumping standing water are your best protection.
Sources (11)
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