Although spiders are often considered insects they are actually arachnids and are characterized by having eight legs, no wings or antennae and feed on insects.  Seattle, Portland and all of Western Washington and Oregon is home to many spider species including the American House Spider, Giant House Spider, Wolf Spider, Hobo or Aggressive House Spider, Cellar Spiders and the Black Widow Spider. The Brown Recluse spider also raises a lot of concern in the Pacific Northwest because of its similar appearance to the Aggressive House Spider but don’t worry – the Brown Recluse Spider is not native to our area!

 An adult female house spider can measure up to 8 mm in length while an adult male only measures 4 mm.  Both are typically brown or gray in color with darker markings along their bodies.  Black widow spiders are found throughout Western Washington and Oregon.  Females can be up to 1 1/2" in length, including her legs, and are shiny black.  Their abdomens are quite fat, with an easily recognizable red hour-glass shaped mark on the underside.  Males are much smaller and much more narrow and along with the red markings, they have white lines on their abdomens as well. Brown recluse spiders are larger in size with both genders of the species measuring approximately ½-inch in length and are yellow-tan in color with long legs and a fiddle-shaped pattern close to the eyes.  

Why Do I Have Them?

Spiders find your structure to be a protective, resourceful home. House spiders will move indoors to find secure areas to build their webs.  Corners, closets, where walls meet ceilings are all common places to find a web constructed. While outdoors they will often construct their webs in protected areas around doors, windows and outdoor light fixtures as well as other areas that will attract their prey.  If a web is not providing adequate prey it will soon be abandoned for a new location resulting in the dusty webs that are unattractive.  Brown recluse spiders are shy in nature, have a habit of taking shelter indoors and are mainly active at night when they come out to hunt for insects.  Black widow spiders like to remain outdoors primarily spinning webs near the ground in dark places, such as in leaf debris, but will spin webs in the dark corners of sheds, garages, crawl spaces and basements if there is an ample food supply.

Are They Dangerous?

Although house spiders can bite their venom is not dangerous to humans and they are not known to be aggressive in nature.   They are considered more a nuisance pest because of their habit to build and abandon webs indoors.  Brown recluse spiders and Hobo spiders or Aggressive House spiders will bite if disturbed or cornered and both spiders have a necrotoxin, however, spiders do not often inject venom when giving warning bites, so not all bites result in problems. When venom is injected the bite effects can range from mild irritation to slow-healing open sores and may even prove fatal for some.  

How Do I Get Rid Of Spiders?

All these spiders may live outside in rocks, piles of wood, tubing, junk, railroad ties, etc. 
Inside, they live in less disturbed areas of basements, crawlspaces, storage areas and closets, in clothing, shoes, boxes etc. Look around and see what can be done to modify these potential habitats.

  • Organize potential habitats for high visibility, and less clutter. Keep things off ground.
  • Remove outside debris.
  • Cut tall grass and groundcover touching exterior walls.
  • When working in these habitats, wear protective clothing and be cautious with bare appendages.

At Eden, we combine control and treatment tactics for the most effective, long-term protection for our clients. These tactics include sanitation control, access removal, control physical & mechanical elements, chemical treatment, and ongoing monitoring.

  • Vacuum spiders, webbing & egg sacs inside and out.
  • Sodium vapor, amber, or yellow exterior lighting is less attractive to insect prey. 
  • For occasional wanderers and marching males, the building must be tight or the spiders will enter.
  • Door sweeps, open pipe chases, damaged vent screens, etc. can all be means of entry.
  • GLUE TRAPS allows monitoring of population and control.

Chemical Treatment

  • If all the above have been done, chemical controls are usually not necessary.
  • Treatments in basements, crawlspaces, attics and complicated areas may be warranted to reduce large populations, but this will cause many spiders to enter living and working spaces.

Because many spiders are reclusive in nature, treatment of infestations can be a very difficult task and should be handled by trained professionals.  Contacting Eden is the ideal way to get rid of spiders in your home or business.  We offer highly effective pest control services that will target and eliminate spiders.

Is The Treatment Safe?

The health and safety of our customers, their family or employees is very important to us and that is why we use products and treatments that are EPA registered for pest control use.  In addition all of our pest control professionals are registered and licensed by the state and by local jurisdictions where we provide service to ensure proper application.  

Be careful when looking for professionals to solve your spider problem…Unfortunately, chemical treatments are used in place of the above-mentioned tactics as a poor, less effective, but easier substitute. Remember, spiders are only slightly susceptible to residual treatments. Preventive applications will not work!

How Soon Can You Get Here?

At Eden we make every effort to be with you as soon as possible.  In most cases we can respond on the same or next day.

How Much Do Your Services Cost?

An average Spider treatment costs between $275-$375, however, Washington and Oregon offer a perfect environment to many different pests and species which all require a different treatment, and therefore a different price.  Our contracts are customized to meet your needs and expectations so our prices reflect that.  When you contact our office or schedule online, we can further define the price for your recommended service.

Spider treatments include…._______

How Do I Prevent This In The Future?

Keeping the physical elements and resources for spiders controlled like

Western Washington and Oregon spiders and other pest problems can be difficult to prevent and that is why many of our clients choose to continue service with our Enhanced Service Program to keep pests out of their home or our Commercial Customized Program for commercial facilities.

Where Does Eden Service?

Eden offers pest control, bed bug services, and healthy home inspections for both homes and businesses throughout Western Washington and Oregon including Seattle, Olympia, Portland and Roseburg.

 wolf spider in portland or

  • Wolf Spiders are a large family of active hunters.
  • They do not construct webs.
  • Will enter homes  sometimes in large numbers.
  • Can be quite large and run very fast which people find unsettling.
  • While they may bite, there is no serious reaction.

house spider is seattleorb weaver spider in washington

  • The American House Spider is the most common orb weaver found throughout North America.
  • These spiders can be especially problematic in the late summer/early fall as they will migrate to houses seeking warmth, site to attach egg capsules, and seeking prey drawn to lights.
  • The egg capsules hatch in the spring releasing hundreds of tiny spiderlings.
  • Web removal and removal of egg sacks are best methods of control. 

cellar spider in oregon

  • Cellar Spiders are found in barns, basements, homes, and other structures.
  • Most common spider found in warehouses.
  • Spins an irregular web and never removes old webbing causing large accumulations.
  • Hangs in web with abdomen pointed up, and shakes web violently when disturbed.

large hobo spidermap of common spider ranges

  • Hobo Spiders Build horizontal webs with funnel in one end
  • Males begin “mating march” in fall
  • Female constructs egg case and guards it until she dies (Nov.)
  • Most often encountered on ground level and basement.  (Not good climbers!)
  • Bites occur more often in fall during the annual “mating march” or when females are protecting their egg case.
  • This spider is no more aggressive than other wandering spiders.  It does not bite without clear provocation.
  • It may run toward an individual, due to poor long-distance sight.
  • Hobo spiders have a NECROTOXIN (bite may lead to local tissue death)
  • But, estimated 50% of bites are dry (no toxin injected) male & juvenile bites are worse than female.
  • Bites result in initial redness and swelling, leaving a hardened area.
  • Within 24-48 hours blistering may occur at bite
  • Blister will rupture leaving an open ulcer.

 large spider bite


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