Santa Clarita Decibel Limits Rules (2026): What You Need to Know

Section 11.44.040 of the Santa Clarita Municipal Code establishes the specific decibel levels that apply to each zoning district. It is unlawful for any person within the city to produce, cause, or allow noise received on property occupied by another person in excess of these limits. Residential zones are held to 65 dBA during daytime hours (7:00 AM to 9:00 PM) and 55 dBA during nighttime hours (9:00 PM to 7:00 AM). Commercial and manufacturing zones are allowed 80 dBA during the day and 70 dBA at night.

The code includes adjustments for different noise characteristics. Repetitive impulsive noise and steady whines receive a 5 dB penalty (effectively reducing the allowed threshold). Intermittent daytime noise receives graduated adjustments from +5 to +20 dB depending on the cumulative duration within an observation period. At the boundary line between a residential property and a commercial or manufacturing property, the noise level standard of the quieter zone governs.

Machinery, equipment, pumps, fans, air conditioning apparatus, refrigerating equipment, and similar mechanical or electrical devices must comply with these limits at any property line. For condominiums and apartments, noise levels must also comply within adjoining units. The city's code enforcement officers use calibrated sound-level meters to measure compliance during complaints.