There are many different types of spiders that are typically found in Michigan, but very few that you will actually find in Grand Rapids, and in your home or business.
American House Spider
The most common of course is the "American House Spider", a largely harmless spider that will only bite if threatened by humans. Even if that happens, at worst you may get a little itching and swelling.
What you will probably never encounter, is a "Brown Recluse Spider" here in Grand Rapids. These are dangerous spiders, but they can't live in temperatures under 40 degrees. This means that, even if a Brown Recluse does happen to find it's way to your neighborhood, maybe hitching a ride in a shipping container of some sort from a warmer climate, a winter like the ones we get in West Michigan will kill them off.
Brown Recluse Spider
Yes, there have been some Brown Recluse spiders found from time-to-time in West Michigan, but chances are, the spider you are concerned with in your home, is not a "Brown Recluse"...
Spiders can be a nuisance, but most found in our area are truly harmless to humans. If you have questions or concerns about any spiders though, feel free to contact us at Professional Pest Management, and we will be happy to help!