Sonoma County, CA Noise Ordinances: Barking Dogs (2026)

The rule sits in Article X, Prohibited Conduct, of Chapter 5, the Sonoma County Animal Regulation Ordinance. Chapter 5 governs the unincorporated area of the county, plus any city that contracts with the county for animal regulation services (§ 5-10). Section 5-126(a)(1) bars an owner from permitting an animal to obstruct the reasonable and comfortable use of property in any neighborhood or community by chasing vehicles, molesting passersby, barking, howling or making other noise.

The test is the effect on neighbors. Section 5-126 prints no decibel limit, no minutes-of-barking threshold and no quiet-hours window, so one long night of howling and a pattern of daily barking are measured the same way: did the animal obstruct reasonable and comfortable use of nearby property. The text covers any animal, not only dogs. An owner under § 5-6 is anyone who owns the animal or has charge, care, custody or control of it for fifteen (15) or more consecutive days, which reaches a long-term caretaker as well as the person who owns the animal.

Subsection (b) declares any violation a public nuisance, and subsection (c) sets the complaint path. The director or an animal regulation officer who has reasonable cause to believe a nuisance exists can open an investigation alone. The director must investigate when two or more people living in separate residences, or regularly employed in the neighborhood, affirm the nuisance in writing. Where only one person lives or works within three hundred feet (300′) of the animal, that one written affirmation is enough. If the investigation confirms a nuisance, the director can order the owner to abate it, and if the owner ignores the order the director can refer the matter straight to the district attorney for prosecution. The director is the county agricultural commissioner/sealer (§ 5-11), so complaints run through the Division of Animal Regulation in that office.

Two further subsections widen and limit the rule. Under subsection (d), any person can bring a private action under Civil Code section 3493 for compliance with the section, without waiting for the county. Under subsection (e), an animal that is part of an agricultural operation exempt from nuisance liability under Civil Code section 3482.5 is not a public nuisance under this section, but only if it is owned and kept in compliance with Chapter 5 and state law. Section 5-2 directs that the whole chapter be read in a way that protects agricultural operations in the county.