Decibel Limits: Castaic vs Glendale
How do decibel limits rules compare between Castaic, CA and Glendale, CA?
Castaic and Glendale have similar restriction levels.
Castaic, CA
Los Angeles County
LA County Code Section 12.08.390 establishes tiered exterior noise standards by zone for unincorporated areas. Residential limits are 50 dBA day and 45 dBA night. Commercial zones allow 60/55 dBA and industrial zones allow 70 dBA at all times.
View full Castaic rules →Glendale, CA
Los Angeles County
Glendale enforces presumed ambient noise standards under GMC 8.36.040. Residential (single-family/duplex) zones are limited to 55 dBA daytime and 45 dBA nighttime exterior. Multifamily residential allows 60 dBA. Commercial zones are set at 65 dBA. Any noise exceeding the presumed ambient plus 5 dBA is a violation.
View full Glendale rules →Key Facts Comparison
| Fact | Castaic | Glendale |
|---|---|---|
| Code Section | §12.08.390 | - |
| Residential Day | 50 dBA | 55 dBA (single-family) |
| Residential Night | 45 dBA | 45 dBA |
| Commercial Day | 60 dBA | - |
| Industrial | 70 dBA always | - |
| Multifamily | - | 60 dBA anytime |
| Commercial | - | 65 dBA anytime |
| Code | - | GMC 8.36.040 |
Highlighted rows indicate differences between cities.
Castaic FAQ
What are the decibel limits in unincorporated LA County?
Residential areas are limited to 50 dBA during the day and 45 dBA at night. Commercial zones allow 60 dBA daytime and 55 dBA nighttime. Industrial zones permit 70 dBA at all times.
How are noise violations measured in LA County?
Noise is measured at the property line of the affected party using the A-weighted decibel scale. Duration matters too — exceeding limits for more than 30 minutes per hour triggers Standard No. 1.
Glendale FAQ
What is the noise limit in Glendale residential areas?
Single-family and duplex zones: 55 dBA daytime, 45 dBA nighttime. Multifamily zones: 60 dBA anytime. Any noise exceeding the presumed ambient plus 5 dBA is a violation under GMC 8.36.040.
How does Glendale measure noise violations?
Using the A-weighted scale with slow response at the property line. If noise contains a pure tone or impulsive sound, the standard is reduced by 5 dBA.
Compare other topics
See how Castaic and Glendale compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool