Construction Hours: Altadena vs Castaic
How do construction hours rules compare between Altadena, CA and Castaic, CA?
Altadena has fewer restrictions than Castaic.
Altadena, CA
Los Angeles County
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.
View full Altadena rules →Castaic, CA
Los Angeles County
LA County Code Section 12.08.440 restricts construction in unincorporated areas to weekdays 7 AM–7 PM and Saturdays 8 AM–5 PM. Construction is prohibited on Sundays and legal holidays. Equipment must have mufflers in good condition.
View full Castaic rules →Key Facts Comparison
| Fact | Altadena | Castaic |
|---|---|---|
| Code Section | LA County Code 12.08.440 | §12.08.440 |
| Weekday Hours | 7 a.m. – 8 p.m. | 7 AM – 7 PM |
| Saturday Hours | 8 a.m. – 8 p.m. | 8 AM – 5 PM |
| Sunday/Holiday | Prohibited | - |
| Sundays/Holidays | - | Prohibited |
| Fine | - | Up to $1,000 |
Highlighted rows indicate differences between cities.
Altadena FAQ
When can contractors start work in Altadena?
7 a.m. on weekdays, 8 a.m. on Saturday — Sundays and county holidays are off-limits under LA County Code 12.08.440.
Castaic FAQ
When can construction happen in unincorporated LA County?
Weekdays 7 AM to 7 PM and Saturdays 8 AM to 5 PM. No construction is allowed on Sundays or legal holidays under Section 12.08.440.
Who enforces construction noise rules in unincorporated LA County?
LA County Environmental Health Division handles construction noise complaints at (626) 430-5201. The Department of Public Works also enforces building permit conditions.
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