Thousand Oaks establishes decibel limits for different zoning districts under its municipal code noise provisions. Residential zones are subject to limits consistent with typical California standards, with measurements taken at the property line of the receiving property.
The Thousand Oaks noise ordinance establishes maximum permissible noise levels measured at the receiving property line using the A-weighted decibel scale. Residential zones have limits of approximately 55 dBA during daytime (7 AM to 10 PM) and 45 dBA during nighttime (10 PM to 7 AM). Commercial zones: approximately 65 dBA daytime and 55 dBA nighttime. The city considers both steady-state noise levels and impulsive sounds. Noise from HVAC equipment, pool pumps, and generators must comply with these standards at all times. The Conejo Valley's geography, with residential neighborhoods nestled among hills, can amplify sound propagation. The city may use sound level meters during enforcement but also applies a reasonable person standard for noise disturbances.
Exceeding decibel limits: $250 first offense, $500 second offense, $1,000 third offense within 12 months. Ongoing commercial noise exceeding limits may trigger conditional use permit review. HVAC equipment and pool pumps operating above limits may require sound barriers or equipment modification at the owner's expense.
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