Construction hours in Altadena, CA — sometimes called construction noise rules or contractor work-hour ordinances — set when contractors can run power tools, hammers, and heavy equipment.
LA County Code Section 12.08.440 limits construction noise in residential areas to 7:00 a.m.–8:00 p.m. weekdays and 8:00 a.m.–8:00 p.m. on Saturdays. No construction is allowed on Sundays or county holidays.
Section 12.08.440 of Chapter 12.08 (Noise Control) prohibits operation of any construction, demolition, alteration, or repair equipment within 500 feet of a residential property outside of permitted hours. Permitted weekday hours are 7:00 a.m. to 8:00 p.m., Saturday hours are 8:00 a.m. to 8:00 p.m., and Sunday/holiday construction is generally prohibited. Construction equipment is also limited by the dB caps in Section 12.08.440 itself (e.g., 75 dBA at 50 feet for mobile equipment).
Violations are processed as infractions/administrative fines under Chapter 1.25 of the County Code (typically $100, $200, $500 escalating) and each day is a separate violation.
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Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle construction hours.
See how Altadena's construction hours rules stack up against other locations.
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