My Bellingham house is over 100 years old. Does that mean I have carpenter ants?

Not automatically. Moisture matters more than age. An old house with working gutters, a dry crawl space and no wood touching soil may never have them. What raises the risk is a slow leak, a deck ledger that stays wet, or a stump or woodpile near the foundation. If you see large black ants indoors in late winter or sawdust under trim, have it inspected.

I own a rental near Western. Should I call, or should my tenant?

Either can call, but the owner usually should, because the fix is often structural. Mice in a rental come in through gaps in the foundation, siding or utility lines, and sealing those is a building repair. We can coordinate access with your tenant, send them the text before arrival, and walk you through what was found and sealed.

Are the big spiders in my basement dangerous?

Giant house spiders look alarming but are not considered a medical threat. The hobo spider, long blamed for bites in the Northwest, is no longer thought to be dangerous either. The real issue is numbers: in fall they come in through basement windows and door gaps. Sealing those gaps and treating the perimeter cuts down how many make it inside.

How quickly can you get to Bellingham?

Someone will be at your door within 48 hours. Bellingham is about 80 min north of Lake Stevens HQ, and you get a text about 30 minutes before the truck arrives. Stinging-insect calls get priority on the schedule.

Is the treatment safe around kids and pets?

Yes. We use products rated for occupied homes and apply them where pests travel, not across your living space. The technician walks you through what goes down and where before anything is treated. If you keep bees, chickens or a vegetable garden, tell us and we work around them.

North Sound · About 80 min north of Lake Stevens HQ

Pest control in
Bellingham, WA.

Up on Bellingham Bay, the steady marine damp and all those classic older homes give carpenter ants and rodents plenty to work with, especially once the fall rain sets in.

★ 5.0 from 64 Google reviews
WSDA license #112338
Out within 48 hours

Call now (425) 332-6566

Get a free Bellingham quote

Step 1 of 3

Pest control in Bellingham, WA

Bellingham sits between the saltwater and the Chuckanut foothills, and the whole town stays damp from October into spring. Marine air off Bellingham Bay, shaded slopes on Sehome Hill and South Hill, and a heavy urban tree canopy keep wood wet for months. That is why pest control in Bellingham starts with moisture: carpenter ants in softened framing, rats and mice running the creek corridors, and giant house spiders moving indoors every fall.

The housing is the other half. Large parts of the older neighborhoods went up before World War II, from Fairhaven's Victorians to the bungalows of the Lettered Streets and Columbia, and old houses have old gaps. Add the rental stock around Western Washington University and newer builds out in Cordata and King Mountain, and one visit can look very different from the next across town.

Close-up of a black ant on splintered, Bellingham, WA

Ant Control in Bellingham

Carpenter ants in Bellingham's older, damp framing

Carpenter ants do not eat wood. They hollow it out, and they strongly prefer wood that is already soft from moisture. Bellingham supplies plenty of it: window sills and rim joists in century-old houses, decks that never fully dry under the firs, and stumps and woodpiles in yards that back onto greenbelts. The usual pattern is a parent colony outside in rotting wood, with satellite nests inside a warm wall void.

We identify the ant first, since sugar ants trailing to the counter get baited, not sprayed. For carpenter ants we find the parent nest and the satellites and treat both, because hitting only the trail you can see leaves the colony intact. Watch for coarse sawdust (frass) under baseboards or window trim, large black ants indoors in late winter, and winged ants swarming inside on the first warm days of spring.

More on our ant control Guide: Ants After Rain: A Moisture Checklist for Your Home

Close-up of a brown rat on a concrete ledge outside a home, Bellingham, WA

Rodent Control in Bellingham

Rats and mice along Bellingham's creeks and greenbelts

Bellingham has an unusual amount of green running through it: Whatcom Creek and Whatcom Falls Park, Padden Creek, Squalicum Creek, the Interurban Trail and a web of wooded paths. Those corridors let rats and mice travel through neighborhoods under cover, and when fall rain soaks the ground they look for a dry attic or crawl space. Mature trees with limbs over the roof give rats an easy way up.

Rodent control in Bellingham starts with exclusion. We seal every gap a quarter inch and up with hardware cloth, sheet metal, mortar or copper mesh, then set tamper-resistant bait stations outside and snap traps inside, and come back to check and remove. Signs to watch for: droppings near foundation vents, scratching in the ceiling after dark, and chewed insulation or torn vapor barrier in the crawl space.

More on our rodent exclusion Guide: How to Keep Mice Out of the Garage Before Fall

A spider in its web against the siding of a house, Bellingham, WA

Spider Control in Bellingham

Giant house spiders in Bellingham basements every fall

From late August through October, male giant house spiders leave woodpiles, rockeries and ivy to look for mates, and a lot of them end up inside. Older Bellingham homes make it easy, with loose basement windows, gaps under doors, and daylight basements and cellars that stay cool and quiet. They are big and fast, and they turn up in bathtubs and on basement floors right as the rain starts.

We treat the exterior perimeter, eaves, window wells, foundation vents and door thresholds, and knock down webs so they have fewer places to settle. Inside, treatment is targeted to where they hide rather than broadcast. Cutting back ivy and moving firewood off the foundation helps a lot. Funnel webs in basement corners and window wells tell you where they are getting in.

More on our spider exterminator Guide: Spiders in Washington Homes: Which Ones Actually Matter

From the call to the follow-up

Hiring a Bellingham exterminator

When you call Pure Guard as your Bellingham exterminator, the first question is what you are seeing and where, because a carpenter ant in the kitchen and a mouse in the attic call for different work. Someone is out within 48 hours, and you get a text about 30 minutes before arrival. The tech inspects first, including the crawl space and attic when the problem points there, explains what was found, then treats and seals. If the pest comes back while you are under warranty, the re-treatment costs you nothing.

Rating: 5.0 stars, 64 Google reviews
Licensed: WSDA Commercial Applicator #112338
Response: Someone out within 48 hours
Warranty: Re-treatments at no charge

What changes the job here

Old houses, hillside lots and student rentals in Bellingham

Much of the older housing near downtown and the bay sits over crawl spaces, and many of those homes have been added onto over the decades. Every addition leaves a seam where the old foundation meets the new, and those seams are where mice and ants get in. Hillside lots on South Hill and Sehome often have a daylight basement on the low side and a tight, hard-to-reach crawl space on the high side, so plan on the tech needing access to both.

Rentals near campus change the job too. Tenants turn over, garbage piles up, and small gaps go unreported, so we treat the building as a whole instead of one room. Newer homes out in Cordata and King Mountain are tighter, but bark beds and fresh plantings along the foundation still invite ants and spiders.

Across Bellingham

Bellingham neighborhoods and what they deal with

Fairhaven and South Hill: Victorian-era and early-1900s houses on steep lots near the water, where damp framing and old foundations make carpenter ants and rodents the main concern.
Lettered Streets and Columbia: Dense blocks of older bungalows under big street trees, so rats travel through the canopy and carpenter ants find soft sill plates.
Sehome and York: Heavy rental stock near Western Washington University and downtown, where turnover and shared walls let mice move between units.
Silver Beach: Homes along the Lake Whatcom shoreline and wooded slopes, where lakeside moisture and tree cover keep rodents and carpenter ants active.
Samish: Wooded lots around Lake Padden, where the forest edge brings rodents, spiders and ground-nesting yellow jackets close to the house.
Cordata and King Mountain: Newer subdivisions on the north side, where construction gaps around utility lines and fresh bark beds draw mice and ants in the first few years.

Through the year

The Bellingham pest year, season by season

Spring: Carpenter ant swarmers show up indoors on the first warm days of April and May, often the first sign a colony is living in the walls.
Summer: Yellow jacket and paper wasp nests grow fast in eaves and in the ground along the greenbelts, peaking in August.
Fall: Once the October rain settles in, rodents and giant house spiders move indoors from the creeks, trails and woodpiles.
Winter: Rats and mice dig into attics and crawl spaces through the wet months, so scratching overhead at night is the cue to get exclusion done.

Questions, answered

Pest control in Bellingham, the common questions.

My Bellingham house is over 100 years old. Does that mean I have carpenter ants?: Not automatically. Moisture matters more than age. An old house with working gutters, a dry crawl space and no wood touching soil may never have them. What raises the risk is a slow leak, a deck ledger that stays wet, or a stump or woodpile near the foundation. If you see large black ants indoors in late winter or sawdust under trim, have it inspected.
I own a rental near Western. Should I call, or should my tenant?: Either can call, but the owner usually should, because the fix is often structural. Mice in a rental come in through gaps in the foundation, siding or utility lines, and sealing those is a building repair. We can coordinate access with your tenant, send them the text before arrival, and walk you through what was found and sealed.
Are the big spiders in my basement dangerous?: Giant house spiders look alarming but are not considered a medical threat. The hobo spider, long blamed for bites in the Northwest, is no longer thought to be dangerous either. The real issue is numbers: in fall they come in through basement windows and door gaps. Sealing those gaps and treating the perimeter cuts down how many make it inside.
How quickly can you get to Bellingham?: Someone will be at your door within 48 hours. Bellingham is about 80 min north of Lake Stevens HQ, and you get a text about 30 minutes before the truck arrives. Stinging-insect calls get priority on the schedule.
Is the treatment safe around kids and pets?: Yes. We use products rated for occupied homes and apply them where pests travel, not across your living space. The technician walks you through what goes down and where before anything is treated. If you keep bees, chickens or a vegetable garden, tell us and we work around them.

Everything else we handle in Bellingham

yellow jacket removal backyard mosquito treatment German cockroach treatment commercial pest control vapor barrier replacement

Also serving nearby

Near Bellingham

Pest Control in Mount Vernon Sedro-Woolley Exterminator Rodent Control in Camano Island Stanwood, WA Pest Control

Our core markets each have a dedicated page: rodent control in Lake Stevens , Lynnwood pest control , pest control in Edmonds , Woodinville exterminator , and rodent control in Everett .

Bellingham, WA

Tell us what you're seeing.

Family-owned and based in Lake Stevens, WA. Call or send the form and someone will be out within 48 hours.

Call now

(425) 332-6566

Request a free quote online →

Pest control in Bellingham, WA.