Alameda County, CA Noise Ordinances: Construction Hours (2026)
Construction hours in Alameda County, 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
- 7 a.m.–7 p.m.
- Weekend hours
- 8 a.m.–5 p.m.
- Equipment condition
- Must be properly maintained
- Applies to
- Unincorporated areas only
Summary
Unincorporated Alameda County exempts construction noise from its rules only between 7 a.m.–7 p.m. on weekdays and 8 a.m.–5 p.m. on Saturday and Sunday.
Construction. The provisions of this chapter shall not apply to noise sources associated with construction, provided said activities do not take place before seven a.m. or after seven p.m. on any day except Saturday or Sunday, or before eight a.m. or after five p.m. on Saturday or Sunday.F.Maintenance of Residential Property. The provisions of this chapter shall not apply to noise sources associated with the maintenance of residential property provided said activities take place between the hours of seven a.m. and nine p.m. on any day except Saturday or Sunday, or between the hours of nine a.m. and eight p.m. on Saturday or Sunday.G.Proviso. Notwithstanding the provisions of subsections D, E and F of this section, no exemptions from the provisions at this chapter shall be granted for activities specified in said sections where equipment used for those activities, including mufflers, is not maintained in the condition for which it was designed or intended and thereby unnecessarily increases noise levels so as to cause a noise disturbance or exceed the standards set forth in Section 6.60.040 of this chapter. (Prior gen. code §§ 3-107.701—3-107.707)
Full Breakdown
The county's noise chapter carves out an exception for construction: noise from construction activity is exempt from the chapter's general prohibitions only if it does not occur before 7:00 a.m. or after 7:00 p.m. on weekdays, or before 8:00 a.m. or after 5:00 p.m. on Saturday or Sunday. Construction noise outside those windows loses the exemption and can be cited as a noise disturbance. The exemption itself is voided if construction equipment, including mufflers, isn't kept in proper working condition and unnecessarily increases noise. This applies to unincorporated Alameda County, Castro Valley, San Lorenzo, Ashland and similar communities, not to Oakland, Berkeley or any incorporated city in the county.
Violations & Fines
Construction noise outside the permitted hours, or from poorly maintained equipment, is enforced by the director of environmental health as a noise disturbance violation.
Frequently Asked Questions
Can construction happen on Sunday morning at 7 a.m.?
Does a broken muffler on equipment still count as exempt?
Sources & Official References
Other rules in Alameda County
How Alameda County compares: Cities with the Strictest Construction Hours·California rules heatmap·Compare Alameda County to another location·View the California noise ordinances overview
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