DIY guide
How to keep a Seattle basement dry through the rainy season
Seattle rarely floods a basement with one dramatic storm. It soaks the ground for months, from roughly October to April, until water finds the low spot in your foundation. The fixes that work here are boring and cheap: move roof water away from the house, make the soil slope away, keep window wells and floor drains clear, and run a dehumidifier sized to the space. This guide is the order we would walk a Seattle basement in, from the gutters down.
6 min readUpdated November 1, 2026