Castro Valley, CA Noise Ordinances: Construction Hours (2026)
Construction hours in Castro Valley, CA, sometimes called construction noise rules or contractor work-hour ordinances, set when contractors can run power tools, hammers, and heavy equipment.
Key Facts
- Code Section
- Alameda County §6.60.080
- Weekday Hours
- 7 a.m.-7 p.m.
- Weekend/Holiday Hours
- 8 a.m.-5 p.m.
- Sunday Status
- Same as Saturday window
Summary
Alameda County Code §6.60.080 exempts construction activity from Chapter 6.60 only if it occurs between 7 a.m.-7 p.m. on weekdays and 8 a.m.-5 p.m. on Saturday/Sunday. Outside those windows, the 'plainly audible at 50 feet' standard in §6.60.050 applies and the work becomes a citable nuisance.
Construction activities, provided that they do not take place before 7 a.m. or after 7 p.m. on any day except Saturday or Sunday, or before 8 a.m. or after 5 p.m. on Saturday or Sunday.
Full Breakdown
Per Alameda County §6.60.080(a), construction activities are exempted from the chapter's provisions provided they do not take place before 7 a.m. or after 7 p.m. on any day except Saturday or Sunday, or before 8 a.m. or after 5 p.m. on Saturday or Sunday. Outside those windows the 50-foot 'plainly audible' standard governs, and most powered construction tools fail that test. Major grading or demolition projects that need to operate outside the window require an exception/variance from the County. Sundays and holidays are treated the same as Saturdays.
Violations & Fines
Working construction equipment in Castro Valley before 7 a.m. on a weekday or before 8 a.m. on a weekend is a Chapter 6.60 violation regardless of dB level. Misdemeanor under §6.60.090 (up to $1,000 / six months); administrative citations through Code Enforcement start at $100. Daily violations are separately chargeable.
Frequently Asked Questions
Can construction start at 7 a.m. on Saturday in Castro Valley?
Do lawn mowers and leaf blowers follow the same hours?
Sources & Official References
Other rules in Castro Valley
How Castro Valley compares: Cities with the Strictest Construction Hours·California rules heatmap·Compare Castro Valley to another location·View the California noise ordinances overview
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Construction Hours in Nearby Cities
How other cities in Alameda County handle construction hours.