Decibel Limits: Los Angeles vs Santa Monica
How do decibel limits rules compare between Los Angeles, CA and Santa Monica, CA?
Los Angeles and Santa Monica have similar restriction levels.
Los Angeles, CA
Los Angeles County
Los Angeles Municipal Code Chapter XI (Noise Regulation) sets zone-based decibel limits ranging from 45 dBA in residential zones at night to 75 dBA in industrial zones.
View full Los Angeles rules →Santa Monica, CA
Los Angeles County
Santa Monica Municipal Code Section 4.12.060 establishes three noise zones with specific dBA limits. Residential Zone I limits are 50 dBA nighttime and 60 dBA daytime (15-minute Leq). Non-residential Zone II is 60/65 dBA. Industrial Zone III is 70 dBA at all times. A 5 dBA penalty applies for tonal, impulsive, music, or speech content.
View full Santa Monica rules →Key Facts Comparison
| Fact | Los Angeles | Santa Monica |
|---|---|---|
| Residential night limit | 45 dBA (10pm-7am) | - |
| Residential day limit | 55 dBA (7am-10pm) | - |
| Commercial zone limit | 60-65 dBA | - |
| Industrial zone limit | 65-75 dBA | - |
| Standard | Ambient plus 5 dBA | - |
| Zone I Day | - | 60 dBA (15-min Leq) |
| Zone I Night | - | 50 dBA (15-min Leq) |
| Zone II Day | - | 65 dBA (15-min Leq) |
| Code | - | SMMC §4.12.060 |
Highlighted rows indicate differences between cities.
Los Angeles FAQ
Can my neighbor be cited if I hear them through the wall?
Yes. LAMC uses a plainly-audible standard at the property line during night hours, and LAPD can issue citations without a formal sound meter reading when violations are clear.
How do I report a noise violation?
Call LA 311 for non-emergency noise complaints or LAPD non-emergency dispatch for active disturbances. Persistent issues can be referred to the Bureau of Street Services.
Santa Monica FAQ
What are the noise limits in Santa Monica residential areas?
Noise Zone I (residential) limits are 60 dBA during the day (7 AM–10 PM weekdays, 8 AM–10 PM weekends) and 50 dBA at night, measured as a 15-minute equivalent noise level. These are reduced by 5 dBA for tonal noise, music, or speech.
How is noise measured in Santa Monica?
Using A-weighted decibels (dBA) as a 15-minute equivalent noise level (Leq) and a 5-minute continuous noise level. Measurements are taken at the property line of the affected property.
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