anonyme
It’s difficult to tell from the photo, but if the spider is huge, fast, and long-legged it could well be Tegenaria gigantea. There are 3 species of the genus Tegenaria in Seattle, the “hobo spider” being one of them. They’re house spiders, but also live in garages, rockeries, etc. In any event, it would be foolish and unnecessary to kill it. Most of the evidence points to the hobo spider fear frenzy as fabricated.
Photos of “common spiders” will not help you much unless you already have some knowledge of arachnids. In fact, visual identification can be very misleading. As Rod Crawford of the Burke Museum (and author of the aforementioned website) will tell you, most or many spider species must be identified by microscopic examination of genitalia. I’ve had countless people swear to me they had brown recluse spiders in their basements (Tegenaria) and/or black widows (Steatoda, usually). Neither are found in the Puget Sound area, with the exception of a few black widows in the dry microclimates of Whidbey Island.