Why are domestic house spiders common inside my house?

"Some house spider species have been living indoors at least since the days of the Roman Empire, and are seldom to be found outside, even in their native countries," writes Rod Crawford, curator of ... Tegenaria domestica is also known as the domestic house spider, drain spider or barn funnel weaver. read more

House spiders occur throughout the world and have derived their name from their presence inside human dwellings. A number of species are classified as house spiders, although the common house spider is the most recognized. read more

Domestic house spiders are very fast and will more often than not move away quickly during an encounter with the homeowner. However, if one of these arachnids has no possible avenue of escape, they might bite, although documented cases of domestic house spider bites are extremely rare. read more

For reference, compare this photo of a common house spider with this photo of an American wolf spider. And for more help, check out MNN's guide to different types of spiders. Tegenaria domestica is also known as the domestic house spider, drain spider or barn funnel weaver. read more