Marin County supervisors have set new limits on many short-term rental properties used for stays of 30 days or less.

The board at its Jan. 11 meeting set a countywide limit of 1,200 licenses on short-term rental properties, such as those booked through Airbnb or Vrbo (Vacation Rental by Owner).

The majority of Marin’s licensed short-term rentals are in West Marin, especially an area called the Coastal Zone, where 11 percent of all homes are used as short-term rentals, according to the county.

Under the new limits, short-term rentals are limited to one per operator and licenses must be renewed by property owners every two years.

Accessory dwelling units or ADUs built in 2020 or later cannot be used as short-term rentals.

Under the new regulations, no more than half of developed properties can be used as short-term rentals in Dillon Beach and the Seadrift portion of Stinson Beach.