Mission Viejo, CA Noise Ordinances: Decibel Limits (2026)
Key Facts
- Daytime exterior limit
- 55 dB(A), 7 a.m.-10 p.m.
- Nighttime exterior limit
- 50 dB(A), 10 p.m.-7 a.m.
- Tonal/speech/music reduction
- minus 5 dB(A)
- Enforcement
- Police chief, community development director
- Variance application fee
- $75.00
Summary
Mission Viejo caps exterior residential noise at 55 dB(A) from 7:00 a.m. to 10:00 p.m. and 50 dB(A) from 10:00 p.m. to 7:00 a.m. under Municipal Code Sec. 6.35.040. Tonal, speech, or music noise gets a further 5 dB(A) cut, and violations scale by how long the exceedance lasts.
(a)The following noise standards, unless otherwise specifically indicated, shall apply to all residential property within the city: Noise Standards Noise level Time period 55 dB(A) 7:00 a.m.—10:00 p.m. 50 dB(A) 10:00 p.m.— 7:00 a.m.
If the alleged offensive noise consists entirely of impact noise, simple tone noise, speech, music, or any combination thereof, each of the above noise levels shall be reduced by five dB(A). (b)It shall be unlawful for any person at any location within the city to create any noise, or to allow the creation of any noise on property owned, leased, occupied, or otherwise controlled by such person, when the foregoing causes the noise level, when measured on any other residential property, to exceed:(1)The noise standard for a cumulative period of more than 30 minutes in any hour;(2)The noise standard plus five dB(A) for a cumulative period of more than 15 minutes in any hour;(3)The noise standard plus ten dB(A) for a cumulative period of more than five minutes in any hour;(4)The noise standard plus 15 dB(A) for a cumulative period of more than one minute in any hour; or(5)The noise standard plus 20 dB(A) for any period of time.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 51).
Full Breakdown
4-1971 sound level meter per Sec. 020 and Sec. 030. If the offending noise is impact noise, simple tone noise, speech, or music, each threshold drops by an additional 5 dB(A). Subsection (b) makes it unlawful to cause noise on any other residential property that exceeds the standard for more than 30 minutes in an hour, the standard plus 5 dB(A) for more than 15 minutes, plus 10 dB(A) for more than 5 minutes, plus 15 dB(A) for more than one minute, or plus 20 dB(A) for any period at all.
If ambient noise already exceeds a tier, the allowable cumulative period or level is adjusted upward to match the ambient condition (Sec. 040(c)). Measurements are taken at any point on the affected property, at least four feet from the nearest wall, ceiling, or floor (Sec. 100). The chief of police and the city's community development director enforce the chapter and may make warrantless misdemeanor arrests under Penal Code Sec. 5 (Sec. 110). 00 fee; the five-member noise variance board rules within roughly 30 days of referral, and either the applicant or the health officer can appeal to the city council within 15 days (Sec. 140).
Violations & Fines
Exceeding the exterior standard is a misdemeanor prosecuted under Sec. 1.01.200 et seq. Interfering with, opposing, or resisting the police chief or community development director while enforcing the chapter is separately unlawful under Sec. 6.35.110(b). An offender who obtains a noise variance remains subject to prosecution until the variance is actually granted by the noise variance board.
Frequently Asked Questions
What is the loudest noise allowed outdoors at night in Mission Viejo?
How long can noise exceed the limit before it's a violation?
Can a resident get an exception to the noise limits?
Sources & Official References
Other rules in Mission Viejo
California rules heatmap·Compare Mission Viejo to another location·View the California noise ordinances overview
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