Mendocino County, CA Short-Term Rentals: Noise Rules (2026)

For vacation rentals in the Town of Mendocino and the unincorporated Coastal Zone, Chapter 20.748 sets the operative noise standard: rentals 'shall not create noise impacts to surrounding properties and uses that exceed noise standards set out in the County's General Plan Development Element, Table 3-J, Exterior Noise Level Standards (Levels not to be Exceeded More than 30 Minutes in an Hour) and Table 3-L, Maximum Acceptable Interior Noise Levels Created by Exterior Noise Sources.' These General Plan tables, rather than a separate decibel ordinance, define the ceiling. Notably, Mendocino County does not have a stand-alone numeric noise ordinance for general enforcement, which county staff and supervisors flagged as a gap when discussing the inland STR ordinance in February 2026. As a result, the draft inland approach relies on a Good Neighbor Policy requiring operators to give guests and neighbors information about noise, trash, parking, pets, emergency contacts, behavioral expectations, and how to file complaints, paired with a three-strike enforcement model (three verified violations within 12 months). Operators should set clear quiet-hours house rules and provide a local contact so complaints can be resolved quickly, since persistent noise complaints can lead to enforcement and license problems.