Decibel Limits: Long Beach vs South Gate
How do decibel limits rules compare between Long Beach, CA and South Gate, CA?
South Gate has fewer restrictions than Long Beach.
Long Beach, CA
Los Angeles County
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 →South Gate, CA
Los Angeles County
South Gate Municipal Code Chapter 11.34 sets exterior noise standards in dBA Leq by land use category, inclusive of ambient noise. Residential zones cap at approximately 50 dBA daytime (7 a.m.–10 p.m.) and 40 dBA nighttime (10 p.m.–7 a.m.); noise-sensitive zones cap at ~45 dBA at all times; commercial at ~55 dBA. Measurements are taken at the closest adjoining property line between habitable parcels or at the nearest public right-of-way, four feet above ground, ten feet from the nearest wall. Chapter 11.34 Table 11.34-2 also caps temporary increases over ambient based on duration of the noise event.
View full South Gate rules →Key Facts Comparison
| Fact | Long Beach | South Gate |
|---|---|---|
| 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 | - |
| Code section | - | South Gate Mun. Code Ch. 11.34 |
| Unit | - | dBA Leq (A-weighted, equivalent continuous) |
| Residential day (7am-10pm) | - | ~50 dBA |
| Residential night (10pm-7am) | - | ~40 dBA |
| Noise-sensitive zones | - | ~45 dBA at all times |
| Commercial | - | ~55 dBA |
| Measurement | - | 4 ft above ground, 10 ft from wall, at receptor property line |
Highlighted rows indicate differences between cities.
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.
South Gate FAQ
How do I know if my neighbor is over the limit?
Measurement must be taken at your property line (or the nearest public right-of-way) with a Type-2 sound-level meter set to dBA fast-response, averaged as Leq. Code Enforcement officers carry calibrated meters; you can also document with logged readings from any reputable sound-meter app for an initial complaint.
Does ambient noise count toward the limit?
Yes — Chapter 11.34 standards are 'inclusive of ambient noise.' If background ambient from traffic on Atlantic or Firestone Blvd is already near the standard, even modest added sound from a source can constitute a violation.
What about temporary noise like a backyard party?
Table 11.34-2 sets maximum temporary increases above ambient by duration — the shorter the event, the greater the permitted excess. But sustained noise exceeding these caps, especially after 10 p.m., is a violation.
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