Garden Grove Decibel Limits Rules (2026): What You Need to Know

Garden Grove Municipal Code Chapter 8.44 establishes quantitative exterior noise standards expressed in A-weighted decibels (dBA) measured at the property line of the affected (receiving) property. The standards vary by the zoning classification of the receiving property and by time of day.

For residential zones — including single-family (R-1), multi-family (R-2, R-3), and planned residential developments — the exterior noise limit is 55 dBA during daytime hours (7:00 AM to 10:00 PM) and 50 dBA during nighttime hours (10:00 PM to 7:00 AM). For commercial and office zones, the daytime limit is 60 dBA and the nighttime limit is 55 dBA. For manufacturing and industrial zones, the limit is 70 dBA at all times.

These decibel standards apply to ongoing or repetitive stationary noise sources such as HVAC equipment, generators, compressors, music systems, and similar devices. A noise source that exceeds the applicable standard by 5 dBA or more is considered a clear violation. Borderline cases within 1 to 4 dBA above the limit may require multiple measurements over time to confirm a violation. Code Enforcement officers and Police officers may use sound level meters to verify complaints, but the city also recognizes the plainly audible standard (noise audible at 50 feet or more) as an independent basis for enforcement during nighttime hours. Exemptions from the decibel standards include emergency response vehicles and equipment, construction activity during permitted hours, city-authorized public events and celebrations, and agricultural operations in agriculturally zoned areas.