Sonoma, CA Noise Ordinances: Construction Hours (2026)
Construction hours in Sonoma, CA, sometimes called construction noise rules or contractor work-hour ordinances, set when contractors can run power tools, hammers, and heavy equipment.
Key Facts
- Weekday hours
- 8am-6pm, Monday-Friday
- Saturday hours
- 9am-6pm
- Sunday/holiday hours
- 10am-6pm
- Noise cap
- 90 dBA at the property plane
- Sign required
- projects with 2+ new residences
Summary
The City of Sonoma restricts construction noise to set hours under Sonoma Municipal Code Section 9.56.050(A): 8:00 a.m. to 6:00 p.m. weekdays, 9:00 a.m. to 6:00 p.m. Saturday, and 10:00 a.m. to 6:00 p.m. on Sundays and city-designated holidays, with an outright 90 dBA cap at the property line.
9.56.050 Standard exceptions to general noise limits. The following standard exceptions to the provisions of SMC 9.56.040 shall be allowed as of right, to the extent and during the hours specified. A summary of the standard exceptions provided in this section is set forth in Table 2.
A. Construction. Except as otherwise provided in subsection (B) of this section, or by the planning commission or city council as part of the development review for the project, on any construction project on property within the city, construction, alteration, demolition, maintenance of construction equipment, deliveries of materials or equipment, or repair activities otherwise allowed under applicable law shall be allowed as follows: (1) between 8:00 a.m. and 6:00 p.m., Monday through Friday, (2) between 9:00 a.m. and 6:00 p.m. on Saturday, and (3) between 10:00 a.m. and 6:00 p.m. on Sundays and holidays; however, the noise level at any point outside of the property plane of the project shall not exceed 90 dBA.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 13-2025, passed December 3, 2025).
Full Breakdown
050(A). m. 020(I) includes New Year's Day, Martin Luther King Jr. Day, Presidents' Day, Memorial Day, Independence Day, Labor Day, Columbus Day, Veterans' Day, Thanksgiving and the day after, and Christmas Eve and Christmas Day. Even inside those windows, noise measured at any point outside the project's property plane may not exceed 90 dBA. The planning commission or city council can set different hours as a condition of development review for a specific project. Projects building two or more new residences, or any project the planning commission or council flags, must post a job-site sign at every entrance, at least five feet up, white background with black lettering at least one and a half inches tall, stating the permitted hours. 030 if it disturbs the peace. daily during harvest, which does not follow the standard construction schedule.
Violations & Fines
Construction noise outside the permitted hours, or above the 90 dBA property-line cap during permitted hours, is enforceable under Section 9.56.100 as an infraction or misdemeanor. Missing the required job-site signage on a qualifying project is a separate, independent violation of Section 9.56.050(A).
Frequently Asked Questions
What time can construction start in the City of Sonoma?
Is there a decibel limit on construction noise even during allowed hours?
Do all construction sites need to post permitted-hours signage?
Sources & Official References
Other rules in Sonoma
How Sonoma compares: Cities with the Strictest Construction Hours·California rules heatmap·Compare Sonoma to another location·View the California noise ordinances overview
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Construction Hours in Nearby Cities
How other cities in Sonoma County handle construction hours.