King County, WA Parking Rules: Overnight Parking (2026)

King County does not impose a blanket overnight parking prohibition on county-maintained roads in unincorporated areas, unlike many cities. On most residential county roads, passenger vehicles may park overnight as long as they do not obstruct traffic, block mailboxes, block fire hydrants within 15 feet, or park on sidewalks or in bicycle lanes. However, specific restrictions apply: vehicles parked on the traveled portion of the roadway may be subject to RCW 46.61.570 (stopping, standing, parking prohibited in specified places). Recreational vehicles, trailers, and boats parked on public roadways in unincorporated King County are limited, and a vehicle left in the same location for more than 24 hours on a public right of way may be tagged as abandoned under RCW 46.55 and KCC Title 46. In residential zones, long-term RV storage on the front yard or in the driveway is regulated by KCC 21A.18 (Development Standards) and may be restricted. Many incorporated cities within King County (Seattle, Bellevue, Kirkland, Redmond) have more restrictive overnight parking rules, including time limits and permit zones. Property owners who rent or allow long-term parking of vehicles that are not street-legal may also run afoul of junk vehicle regulations.