Spiders often seek out secluded, undisturbed areas in homes. The most common places you might find spiders include bathrooms, inside kitchen cabinets, closets, corners, ceiling joints, attics, and basements. These locations provide the quiet and shelter spiders prefer, making them ideal for spiders to spin webs or hide. If you're noticing spiders in these areas, it's a sign that you may have an infestation that needs to be addressed by professional exterminators.