The Senate voted unanimously on Friday to create rules for the private impound of vehicles that were parked on private property.
Under the bill, tow truck companies could charge up to about $270 to tow a vehicle and impound it for half a day and another $60 for storage per day thereafter.
Supporters of the bill say changes are necessary to prevent tow truck companies from gouging people with bills over $1,000.
Currently, the Washington State Patrol sets limits on how much tow truck drivers can charge for their services when working with the State Patrol. The bill expands rules to tow trucks working with private property owners.
The bill now goes to the governor.