Sonoma Municipal Code § 9.56.040 caps noise on commercial property at 65 dBA intermittent and 55 dBA constant, measured at the property line, unless a use permit authorizes a higher level. Industrial uses are typically conditioned through the use permit process under Title 19 (Zoning).
Under SMC § 9.56.040, no person shall produce, suffer, or allow to be produced — by any machine, animal, or device — a noise level greater than 65 dBA intermittent or 55 dBA constant when measured on any commercial property, absent a specific use permit authorization. 'Constant noise' is defined in Chapter 9.56 as a continuous noise with no noticeable change in level (e.g., HVAC, refrigeration compressors, pool equipment); 'intermittent noise' covers repetitive noises such as hammering. Because the limit applies at the commercial property where the noise is received, industrial neighbors must keep emissions below these thresholds at the boundary. Stricter residential limits govern if industrial noise crosses into a residential zone — under SMC § 9.56.040, where two or more noise limits may apply, the more restrictive limit governs.
Violations of Chapter 9.56 are enforced by the City of Sonoma Code Enforcement Division and are typically prosecuted as infractions under SMC Title 1 general penalty provisions. The city may also pursue administrative citations or, for use-permit-conditioned uses, revocation or modification of the use permit. Continuing violations can be charged on a per-day basis.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Sonoma, CA
Public parks in the City of Sonoma have set operating hours under Sonoma Municipal Code §9.12.050. Plaza Park and Depot Park are operated by Sonoma County Re...
Sonoma, CA
The City of Sonoma does not have a stand-alone juvenile curfew ordinance in its municipal code. Minors are still subject to California Education Code §48264 ...
Sonoma, CA
The City of Sonoma does not operate a centralized 'no-knock' registry, but a clearly posted 'No Solicitors' or 'No Trespassing' sign at the entrance of priva...
Sonoma, CA
Door-to-door commercial solicitors and peddlers in the City of Sonoma must hold a City business license under SMC Title 5 (§5.04). Non-commercial canvassing ...
Sonoma, CA
Sidewalk vending is legal statewide under the Safe Sidewalk Vending Act (SB 946, Cal. Gov. Code §§51036–51039). California cities may not ban sidewalk vendin...
Sonoma, CA
Mobile food vendors in Sonoma may operate on private property with the owner's consent and in compliance with zoning, and on public sidewalks subject to the ...
See how Sonoma's industrial noise rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.