Rocklin, CA Noise Ordinances: Decibel Limits (2026)

Rocklin's general noise ordinance, Chapter 9.52, adopted January 27, 2026, does not use decibel meters at all: § 9.52.030 instead bans discernable noise from construction, landscaping, and miscellaneous residential activities during set quiet hours, generally before 7:00 a.m. or after 7:00 p.m. on weekdays for construction and before 7:00 a.m. or after 9:00 p.m. for landscaping and other residential noise. Where Rocklin does write a specific decibel number into its code is Chapter 10.34, which regulates mobile vending vehicles such as food trucks and ice cream trucks.

Section 10.34.060(B) allows a mobile vending vehicle to use amplified sound only for traditional transient mobile vending vehicle chimes, and it caps that chime noise at two hard numbers: volume must not exceed seventy decibels measured at fifty feet from the vehicle, and each chime sounding must not last more than ten seconds when the vehicle is stopped. That decibel limit works alongside Chapter 10.34's other restrictions on transient vending in residential zones, including hours limited to 10:00 a.m. to 7:00 p.m. from April through September and 10:00 a.m. to 5:00 p.m. from October through March, a ten-minute cap on any single stop, and a requirement that the vehicle not return to the same location within five hundred feet for at least two hours.

Rocklin's BARRO mixed-use overlay zone contains a separate decibel figure aimed at building construction rather than vehicles: § 17.59.060(D)(1)(a) requires new residential units built in that overlay zone to be constructed so interior noise levels do not exceed an Ldn of 45 dB(A) in any habitable room.