Quiet Hours: Altadena vs South Gate
How do quiet hours rules compare between Altadena, CA and South Gate, CA?
Altadena and South Gate have similar restriction levels.
Altadena, CA
Los Angeles County
Altadena is unincorporated, so LA County Title 12 Chapter 12.08 (Noise Control) applies. Nighttime exterior limits run 10:00 p.m. to 7:00 a.m. with stricter dB caps; daytime runs 7:00 a.m. to 10:00 p.m.
View full Altadena rules →South Gate, CA
Los Angeles County
South Gate Municipal Code Chapter 7.44 makes any 'offensive portable noise emission' a public nuisance and a misdemeanor at any hour. Electronic entertainment devices (radio, TV, stereo) audible beyond 225 feet from the source are unlawful, as are parties of two or more people audible 30 feet beyond the property line. On-private-property noise is governed separately by Chapter 11.34 (Noise Control Program), administered by a noise control officer.
View full South Gate rules →Key Facts Comparison
| Fact | Altadena | South Gate |
|---|---|---|
| Code Section | LA County Code Ch. 12.08 (Title 12) | - |
| Nighttime Window | 10:00 p.m. – 7:00 a.m. | - |
| Residential Night Limit | 45 dBA (R-1) | - |
| Residential Day Limit | 50 dBA (R-1) | - |
| Ambient Exceedance Rule | +5 dB over ambient | - |
| General rule | - | No 'offensive portable noise' at any hour (SGMC §7.44.040) |
| Stereo/TV plain-audibility limit | - | More than 225 ft from source = unlawful (§7.44.020.02(b)) |
| Decibel ceilings | - | 70 dB at 10 ft → 58 dB at 35 ft (§7.44.020.02(b) table) |
| Party rule | - | 2+ people audible 30 ft past property line = violation (§7.44.020.02(c)) |
| Classification | - | Misdemeanor, each hour a separate offense (§7.44.050) |
| On-property noise | - | Governed by Ch. 11.34, not Ch. 7.44 (§7.44.010) |
Highlighted rows indicate differences between cities.
Altadena FAQ
What are Altadena's quiet hours?
10 p.m. to 7 a.m. under LA County Code Ch. 12.08 — Altadena is unincorporated so LA County's noise ordinance applies.
How loud can my backyard be at night?
Single-family residential exterior noise is capped at 45 dBA from 10 p.m. to 7 a.m. per Section 12.08.390.
South Gate FAQ
Does South Gate have set 'quiet hours' like 10 p.m. to 7 a.m.?
Chapter 7.44 does not specify a clock-time quiet-hours window — the prohibition on 'offensive portable noise' applies 24 hours a day. Time of day is one factor in the reasonable-person test under §7.44.020.02(a). Time-specific decibel limits for noise on private property are set out in Chapter 11.34 (Noise Control Program), which is administered by the city's noise control officer.
How loud is too loud for my home stereo?
Under §7.44.020.02(b), if a neighbor or officer can hear your radio, TV or stereo from more than 225 feet away, or if it exceeds 70 dB measured at 10 feet (62 dB at 25 ft, 58 dB at 35 ft), it is unlawful — regardless of the time of day.
Who do I call about a noisy neighbor in South Gate?
Call the South Gate Police Department non-emergency line. Per §7.44.060, enforcement is shared between the city's noise control officer (designated under Chapter 11.34) and police officers. For an active loud party or stereo, police can respond on a portable noise complaint.
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