Mirrormont Short-Term Rentals: Parking Rules Rules (2026)

King County has no dedicated short-term rental parking ordinance for unincorporated areas. Short-term rentals are treated as residential uses, subject to the baseline parking standards in KCC 21A.18, which typically require two off-street parking spaces for a single-family dwelling. Accessory dwelling units generally require one additional off-street space. Hosts are responsible for ensuring that guests park in the driveway or designated on-site parking, and do not block driveways, mailboxes, fire hydrants, or emergency access lanes. On-street parking in most unincorporated residential neighborhoods is available subject to general traffic rules. Rural areas with narrow roads may have posted no-parking signage, particularly on fire access roads in wildland-urban interface areas such as the Cascade foothills. Short-term rentals near SeaTac airport or other high-demand tourist areas may see neighborhood congestion concerns, and complaints about guest parking can trigger code enforcement review under general nuisance provisions. Cities within King County, including Seattle and Bellevue, have their own parking rules for short-term rentals that differ from county standards. For unincorporated properties, best practice is to provide clear parking instructions to guests, cap the number of vehicles, and verify on-site capacity.