RCW 64.37.050: Liability insurance.

A short-term rental operator must maintain primary liability insurance to cover the short-term rental dwelling unit in the aggregate of not less than one million dollars or conduct each short-term rental transaction through a platform that provides equal or greater primary liability insurance coverage. Nothing in this section prevents an operator or a platform from seeking contributions from any other insurer also providing primary liability insurance coverage for the short-term rental transaction to the extent of that insurer's primary liability coverage limits.