Redlands, CA Noise Ordinances: Decibel Limits (2026)

070, Exterior Noise Limits, is the numeric core of Redlands' noise code. ; multi-family residential, public space and institutional uses carry the same 50/60 dBA split; commercial property is allowed 60 dBA at night and 65 dBA during the day; and industrial property is capped at a flat 75 dBA at any time. Subsection B builds in a sliding scale for short, louder bursts measured on any other property: the base Table 1 standard applies for any cumulative period over thirty minutes in an hour, the standard plus 5 dB applies past fifteen minutes, plus 10 dB past five minutes, plus 15 dB past one minute, and plus 20 dB or the ambient level is the outer ceiling for any duration.

Subsection C requires the allowable standard to be adjusted upward in 5 dB increments if the measured ambient noise level already exceeds it. Subsection E reduces every Table 1 limit by 5 dB if the offending noise contains a steady tone, such as a whine or hum, or carries music or speech with informational content. 080 sets separate, stricter interior noise standards measured inside a neighboring occupied building: 45 dBA at any time for residential and institutional uses, 50 dBA for commercial, and 60 dBA for industrial.