Vacation rentals in unincorporated Sonoma County must provide on-site parking scaled to guestroom count, and overnight guest vehicles are capped at one per bedroom, with the maximum stated in all rental agreements and online listings.
Sonoma County's vacation rental zoning standards, adopted as Sec. 26-88-120 and recodified to Sec. 26-28-160 by Ordinance No. 6386 (August 22, 2022), scale parking to guestroom count: one on-site space for rentals with up to two guestrooms, two spaces for three or four guestrooms, and a minimum of three spaces for larger rentals, which must demonstrate adequate parking. On-street parking may count for at most one required space; otherwise overnight guest vehicles are limited to available off-street parking, never exceeding one vehicle per bedroom. The vehicle maximum must appear in all rental agreements, online advertisements, and listings. Coastal-zone rentals follow parallel standards in Sec. 26C-325.10.
Exceeding the maximum number of vehicles is an administrative citation infraction; civil penalties reach $1,500 for a first violation, $3,000 for a second, and $5,000 for a third within one year.
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