Do Giant House Spiders Bite?

Giant house spider - Eratigena atrica - photo
Eratigena atrica - Giant house spider

The giant house spider is among the world’s fastest invertebrates, easily making up to 20 inches (i.e. one-half of a metre) per second. These spiders are real hitchhikers and commonly they make their way into your place by hiding in comfy boxes or spacious belongings. So do house spiders bite? The short answer is yes and no, please, continue reading to decide it for yourself.


The giant house spider is the bigger cousin of the House spider (Tegenaria Domestica) and can be discovered living behind the fireplace, under the couch, or in the bath. 

When these spiders are seen inside homes they usually are somewhere on or close to the floor, but they can also be found on walls, ceilings, in cabinets, tubs, showers and the dark corners of basements. When found outside around human structures, it is often in darker areas, such as flower beds, under logs, rock piles and other sheltered sites.


The giant house spider is generally dark orange, brown or beige. Their smooth belly is covered in brown, beige and gray spots and their legs seem to be hairless. 


Body length: approximately 5/8 in (i.e. 1.6 cm)
Leg span: as much as 3 in (i.e. 7.5 cm)

Worldwide, except Antarctica.
Are They Dangerous?
Spiders typically don’t go out of their way to bite something that they can’t eat. A giant house spider may bite a person in self-defense, but its venom is only harmful to those with specific allergies. Aside from their large size and menacing appearance, this species doesn’t pose much of a threat to people.
Bite Irritation Level
Normally, bites from the giant house spider involve pain equal to a bee sting. The pain is usually localized and lasts for a matter of hours, or at worse less than 1-2 days.
Actually seeing these spiders in unacceptable numbers is the most obvious sign of an infestation. Spiders are especially common in late summer through early fall when spider males emerge from their normal shelters to go out looking for their spouses. 
Did you know?
  • Spiders have blue blood, along with snails and lobsters. This is due to high concentrations of circulating copper.
  • Female giant home spiders can live for a number of
    years, and both female and male can survive for months without
    food or water.
  • Many people are afraid of spiders. Arachnophobia is an intense fear of spiders as well as other arachnids such as scorpions. Symptoms include intense anxiety, avoidance of places known to have spiders, sweating and increased heart rate.

Giant house spider bite TEST: