Franklin County, WA Parking Rules: Commercial & Oversized Vehicles (2026)

260(D) lets a single commercial vehicle, defined as a semi-tractor/trailer exceeding fourteen thousand pounds gross vehicle weight, park or be stored in any residential zoning district, including AP-20 and AP-40, but only under a stack of conditions. 5 acres. The vehicle can't be used to transport flammable, hazardous or combustible materials or liquids, since that activity is restricted to industrial zones. Only the property owner may operate and drive the vehicle that is parked or stored there, though it can be tied to an approved business operation on the same lot.

Before the use is allowed, the Franklin County Public Works Department has to approve a proper ingress and egress approach to the site, and the Planning and Building Department has to review and approve a site plan showing a parking area that is maintained or built to be site-obscuring from public view, set back at least fifty feet from any public roadway or street right-of-way. The county frames the whole use as conditional on it not becoming a nuisance or traffic hazard: if the property owner violates any of these standards, or the use causes a public nuisance or traffic hazard, Franklin County can review the permitted use and take whatever action is necessary to correct, abate, revoke or suspend it, up to and including ordering the vehicle off the property.