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πŸ”Š Noise Ordinances/Decibel Limits

Decibel Limits: Altadena vs Long Beach

How do decibel limits rules compare between Altadena, CA and Long Beach, CA?

Altadena has fewer restrictions than Long Beach.

Altadena, CA

Los Angeles County

Some Restrictions

Exterior noise in Altadena's residential zones is capped at 50 dBA daytime / 45 dBA nighttime (single-family); 55/50 dBA (multi-family); 60/55 dBA commercial; 70 dBA all hours industrial.

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Long Beach, CA

Los Angeles County

Heavy Restrictions

Long Beach enforces exterior noise limits by district under LBMC 8.80.150. Residential areas (District 1) are limited to 50 dBA daytime (7 AM-10 PM) and 45 dBA nighttime (10 PM-7 AM). Commercial (District 2) allows 60 dBA day / 55 dBA night. Industrial zones reach 65-70 dBA.

View full Long Beach rules β†’

Key Facts Comparison

FactAltadenaLong Beach
Code SectionLA County 12.08.390-
R-1 Day Limit50 dBA-
R-1 Night Limit45 dBA-
Multi-family Day/Night55 / 50 dBA-
Commercial Day/Night60 / 55 dBA-
Residential Day-50 dBA (7 AM-10 PM)
Residential Night-45 dBA (10 PM-7 AM)
Commercial Day-60 dBA
Commercial Night-55 dBA
Code-LBMC 8.80.150-160

Highlighted rows indicate differences between cities.

Altadena FAQ

What's the legal decibel limit at my Altadena property line?

50 dBA day / 45 dBA night for single-family residential under LA County Code 12.08.390.

Long Beach FAQ

What is the noise limit in residential areas of Long Beach?

50 dBA during daytime (7 AM-10 PM) and 45 dBA during nighttime (10 PM-7 AM) in District 1 (predominantly residential), as set by Table A in LBMC Section 8.80.160.

How are noise violations measured in Long Beach?

By cumulative duration per hour at the receiving property line. Noise exceeding the district standard for more than 30 minutes per hour is a violation, with stricter thresholds at higher dB levels.

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