The short version
Most termite treatments for a home in Seattle cost about $1,200–$3,500. For Seattle homes, bait systems cost about the same to install, plus a yearly monitoring fee. An inspection usually runs $75–$250.
- Most treatments in Seattle cost about $1,200–$3,500.
- Bait systems add a yearly monitoring fee.
- Inspections usually cost $75–$250.
- Compare what each quote covers, not just the total.
- Insurance usually doesn’t cover termite damage.
Homeowners, landlords and anyone buying or selling a house in Seattle, whether you've spotted something or just want to know what to watch for.
What to look for
Termites work quietly. A colony can feed inside a wall for years. Average winter lows near 37°F slow termites near the surface around Seattle, but they move deeper and keep feeding under heated homes. Spongy floors or bubbling paint usually mean long-running damage. So it's worth an inspection, even for one or two signs.
- 1Layered, honeycombed wood packed with soil.
- 2Piles of identical shed wings on windowsills.
- 3Discarded wings caught in spider webs.
- 4Termite tubes hanging down from ceilings or joists.
- 5Termite activity reported at a neighbor's home.
- 6Mud tubes running up foundation walls or piers.
Why it’s worth acting soon
- Colonies grow and spread every year they go untreated.
- Damage hides behind drywall, flooring and trim.
- Homeowners insurance usually doesn’t cover termite damage.
- An active infestation can complicate a home sale.
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Estimate termite treatment cost in Seattle
Adjust for your situation to see a ballpark range.
Estimated range
A rough guide only. Your quote depends on your house and what the inspection finds.
Treatment options and typical costs
Termite Inspection and WDI Report
$75–$250
The inspector checks the foundation, garage, attic and damp spots. Bring up anything you’ve noticed.
- Time
- 60–120 minutes
- Best for
- Every job, real estate closings, and yearly peace of mind
Liquid Soil Termiticide Barrier
$1,200–$3,500 (often $3–$16 per linear foot)
Where a slab or porch blocks the trench, the Seattle applicator drills holes and injects underneath. The goal is a continuous treated zone with no gaps.
- Time
- Half a day to a full day
- Best for
- Active subterranean termites; fast knockdown around the foundation
Bait Station System with Monitoring
$1,500–$3,500 install, plus $300–$500 per year
Bait stations are set into the ground every 10 to 20 feet around a Seattle home. Foraging workers carry the slow-acting bait home, and the colony collapses.
- Time
- 2–4 hours to install; checked quarterly
- Best for
- Colony elimination, wells and slabs, homes near water
Localized Wood, Foam, and Borate Treatment
$250–$1,500
Spot treatment works when the Seattle inspector can see and reach the whole infestation. Small drywood galleries, porch posts, and exposed sills are typical targets.
- Time
- 1–3 hours
- Best for
- Small drywood spots, wall voids, and exposed framing
Prices are typical published ranges. Ask what’s included before you compare quotes.
Check under the kitchen sink for dampness and soft cabinet wood. Plumbing walls are a common path for termites coming up from a slab.What termite work costs in Seattle.
- Bait Station System with Monitoring: $1,500–$3,500 install, plus $300–$500 per year - Liquid Soil Termiticide Barrier: $1,200–$3,500 (often $3–$16 per linear foot) - Termite Inspection and WDI Report: $75–$250 - A typical home in Seattle is worth around $850k, so a $1,200–$3,500 treatment is a small share of what's at stake. With the crawl spaces common around Seattle, the soil is easier to reach. Tight or wet crawl spaces take longer, though. - Localized Wood, Foam, and Borate Treatment: $250–$1,500
Local termites conditions in Seattle.
An inspection in Seattle usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Knowing Seattle'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 Seattle 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. Seattle sits in a marine west coast climate, and that sets the pace for termite activity here: spring swarm season (March-May), warmer earlier in the south. For Seattle homes, the area is mostly urban, so termites 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.
A downspout that dumps water at the foundation keeps the soil wet year-round. Extend it well away from the house.Which termites live around Seattle.
It nests in soil and builds mud tubes to reach wood. It needs steady moisture. The termite you're most likely to meet in Seattle is the western subterranean termite.
When termites swarm here.
A swarm outside means a colony is nearby. A swarm inside usually means it's in the house. Save a few in a bag, or snap a clear photo. Swarm season is when termites show themselves. For Seattle homes, western subterranean termites usually swarm in spring, and again in fall after the first good rain.
Where to look around your house.
Check the piers, the sill plate and the floor joists. Standing water or a musty smell needs fixing either way. The same advice applies across the area, from Seattle out to Bellevue and Kirkland. A lot of houses around Seattle are built over crawl spaces, and that's usually where termites start. Take a flashlight underneath.
A year of termites in Seattle.
- Fall: with about 38 inches of rain a year in Seattle, make sure gutters and downspouts carry water well away from the foundation. - Summer: with highs around 76°F in Seattle, termites follow moisture, so watch AC drain lines, sprinkler zones and hose bibs. - Spring and fall: swarm seasons. For Seattle homes, swarms often follow the first warm days and the first fall rain. - Winter: a good time to book an inspection in Seattle, before swarm season starts.
Ways to keep the cost down.
- Fix leaks and drainage first. Moisture brings termites back. - Ask about both bait and liquid options for your house. - If you already have a warranty, keep the renewal current. - Book before swarm season, when schedules fill up. - Get two or three quotes, and compare what each one covers.
What happens at an inspection.
Inside, they check the garage, baseboards, plumbing gaps and the attic. They check the foundation, the soil line and nearby wood. The inspector walks the outside of the house first. Most inspections take an hour or two. Photos help. Afterward, ask them to show you what they found. A moisture meter and a probe help them find hidden activity. They'll also go into the crawl space.
Termites or ants?
- Waist: termites are thick through the middle. Ants are pinched. - Antennae: termite antennae are straight. Ant antennae bend like an elbow. - Debris: termites leave mud. Carpenter ants leave sawdust. - Tunnels: termite galleries are packed with mud. Ant tunnels are clean and smooth. - Wings: termite wings are all the same length. Ant wings aren’t.
Getting ready for treatment day.
Mark sprinkler heads and any buried lines. Move stored boxes away from garage walls. Clear a path along the outside walls. Soil treatments and bait stations need little prep. Any drill holes in a slab or patio get patched. Ask how long to stay off treated soil. Keep pets and kids inside while the crew works outside.
Mulch and termites.
A dry strip along the house lets you spot mud tubes. Keep mulch thin and pull it back from the foundation. Wood chips right against siding hold moisture termites like.
Questions to ask before you sign.
- What product or system will you use? - Is the whole foundation treated, or just one spot? - What does the warranty cover, and for how long? - What does the yearly renewal cost? - What do I need to do before and after treatment? - Which termites did you find, and where?
What affects the price
- Local labor rates and licensing requirements.
- Amount of drilling through concrete and patios.
- Extent of existing damage needing repair.
- Number of bait stations required.
- Annual renewal and monitoring fees.
- Attached garages, decks, and additions.
- Warranty type: retreatment only or damage repair.
- Linear feet of foundation to be treated.
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What's your biggest concern about termite control costs?
When to call for help
Call if you see mud tubes, pellets or an indoor swarm. Hollow-sounding wood is another clue. Buying or selling? Get a wood-destroying insect (WDI) report either way. Lenders often ask for one. It's also the cheapest termite service. Carpenter ants leave clean tunnels and sawdust. Termites leave mud.
What you can do yourself
Some of the work is yours. Pull mulch back from the foundation. Fix leaks and clear gutters. Keep firewood away from the house. Treating an active colony is harder. The product has to reach the whole colony. It also needs even coverage around the entire foundation. Store-bought sprays usually kill only the termites you see.
Termites in Seattle
A typical home in Seattle is worth around $850k, which puts a few hundred dollars for an inspection and prevention in perspective. With summer highs around 76°F, Seattle's marine west coast climate decides when local termites are busiest. Not every house gets them, but plenty do. Termites are a steady, moderate risk in Washington. About 38 inches of rain a year in Seattle is plenty for subterranean termites, especially on any side of the house kept damp by gutters or sprinklers.
Local research
Termites in Seattle, WA: what the public record shows
Before you compare quotes, it helps to know which termites actually live in Washington, when they are busiest around Seattle, and what the state figures look like. Everything below links to the agency or university page it came from.
Termite species recorded in Washington
- Western subterranean termite (Reticulitermes hesperus) — Oregon State: causes damage to structures in the Pacific Northwest and 'may swarm any time of year'. Utah State describes swarmers 3/8 inch long and workers 1/4–3/8 inch, pale c…
- Pacific dampwood termite (Zootermopsis angusticollis) — Oregon State: 'consumes and nests inside moist, water-damaged wood'; swarms 'during late summer or fall'. A moisture problem, not a soil problem, is the usual root cause.
When termites are busiest around Seattle
Pacific dampwood swarms late summer or fall; western subterranean may swarm any time of year (Oregon State).
WSU mapping project: subterranean termites 'predominantly found in loamy soils rather than clay or rocky soils', with area maps for Kitsap County, Olympia, Seattle, Tacoma, Spokane, Tri-Cities and Yakima. Dampwood termites indicate a moisture/rot problem.
Sources: University of Georgia Extension; University of Missouri Extension; Termites | Solve Pest Problems. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep termites away
- Install a vapor barrier over crawl space soil.
- Keep gutters clean so water does not pool.
- Keep mulch at least a foot from the foundation.
- Remove tree stumps and buried wood near the house.
- Screen attic and foundation vents with fine mesh.
- Trim shrubs so foundation walls stay visible and dry.
Keep the inspection diagram, treatment record and warranty together. Buyers and inspectors will ask for them later.Did you know?
For Seattle homes, termites are closer cousins to cockroaches than to ants, despite the old nickname white ants.
Questions people ask
How much does a termite inspection cost?
It's worth asking. Some companies credit it toward treatment if you go ahead. Usually $75–$250.
How much does termite fumigation cost?
Most homes around Seattle never need it. It's mainly for drywood termites. Usually $1,200–$4,000, often $1–$4 per square foot.
Why do termite quotes vary so much?
Compare what's included, line by line. Drilling through concrete adds labor. Some include a warranty or yearly checks. Companies measure differently and use different products.
Is a bait system cheaper than a liquid treatment?
Ask for both prices. A liquid barrier has no monthly checks. For Seattle homes, bait costs about the same to install, plus a yearly monitoring fee. Not usually upfront.
How do I choose a termite company?
Compare the proposals, not just the totals. Ask what the warranty covers. Ask which termites they found and what product they'll use. Make sure they're licensed in Washington.
Do I have to leave my house during termite treatment?
Everyone leaves for two to three days, pets and houseplants included. Fumigation is different. Not for a soil treatment or bait stations.
Do most pest control companies treat existing homes for termites?
For Seattle homes, termites are best caught early through inspection, because the damage is hidden inside wood until it is far along. For Seattle homes, a professional inspection looks for mud tubes, damaged wood, and swarming activity, and treatment targets the soil and the colony rather than just the visible wood.
Are termites common in Washington?
Around Seattle, the usual culprit is the western subterranean termite.
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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 Termite Exterminator · Updated September 11, 2026 · How we write these guides