Simi Valley's Noise Ordinances: The Rules That Matter

Every city handles noise ordinances a little differently. In Simi Valley, California, there are 6 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Barking Dogs

Simi Valley treats a barking dog that disturbs neighbors between 10 p.m. and 7 a.m. Sunday through Thursday, or 11 p.m. to 7 a.m. Friday and Saturday, as a public nuisance under Municipal Code § 5-16.02(e). The keeper faces a misdemeanor charge for each day the barking continues, and the City's animal overlay zone exemption never applies to barking dogs.

Key details: Weeknight window: 10 p.m.-7 a.m. Sun-Thu. Weekend window: 11 p.m.-7 a.m. Fri-Sat. Violation type: misdemeanor per day. Max penalty: $1,000 fine and/or 6 months jail. Overlay zone exemption: never covers barking dogs.

Each day a barking dog nuisance continues is a separate misdemeanor under § 5-16.02, punishable under § 1-2.02 by up to a $1,000 fine, up to six months in County Jail, or both. Continuing to allow the barking after a Peace Officer's notice is treated as prima facie evidence of malicious and willful intent under § 5-16.02(k), which can support enhanced citation or a nuisance abatement referral by Code Enforcement.

Amplified Music & Outdoor Sound

A business planning permanent amplified music or dancing in Simi Valley needs a Conditional Use Permit if the site sits within 250 feet of a church, hospital, school, or park, or within 250 feet of a residential zone. Occasional dances at churches, schools, or community centers are exempt but still need a Dance Permit.

Key details: Trigger distance: 250 feet from sensitive use or residential zone. Permit required: Conditional Use Permit, § 9-52.070. Sensitive uses covered: Church, hospital, school, public park. Exempt use: Temporary amplified music/dancing. Occasional dance alternative: Dance Permit under SVMC § 5-7.02.

Operating permanent amplified music or dancing without the required CUP, or outside a permit's conditions, is enforced as a Development Code violation under Chapter 9-78, punishable as a misdemeanor or infraction under SVMC § 1-2.01, carrying up to a $1,000 fine, six months in County Jail, or both, with each day of continued violation charged as a separate offense. Failing to obtain the separate Dance Permit under § 5-7.02 for an exempt occasional dance is a distinct violation of that permit chapter.

Compared to other cities, Simi Valley takes a harder line on amplified music & outdoor sound. The enforcement and penalty structure reflects that.

Quiet Hours

Simi Valley's noise curfew runs 10:00 p.m. to 7:00 a.m. Sunday through Thursday and 11:00 p.m. to 7:00 a.m. on Friday and Saturday. Under Municipal Code § 5-16.02(b), playing a radio, TV, or amplified music loud enough to disturb a neighbor's peace during those hours is a public nuisance and a misdemeanor.

Key details: Weeknight curfew: 10 p.m.-7 a.m. Sun-Thu. Weekend curfew: 11 p.m.-7 a.m. Fri-Sat. Covers: radios, TVs, amplified music. Standard: audible enough to disturb ordinary neighbor. Max penalty: $1,000 fine and/or 6 months jail.

Playing an amplified device loud enough to disturb a neighbor during curfew hours is a misdemeanor under § 5-16.02, chargeable per day. The maximum penalty under § 1-2.02 is a $1,000 fine, six months in County Jail, or both. Ignoring a Peace Officer's warning to stop is treated as evidence of malicious intent under § 5-16.02(k), supporting further enforcement action.

Construction Hours

Simi Valley bars noisy construction, demolition, or building repair work outside 7:00 a.m. to 7:00 p.m. under Municipal Code § 5-16.02(i). Work outside those hours is a public nuisance and a misdemeanor unless the City Engineer grants an exception for urgent public health or safety needs.

Key details: Permitted hours: 7:00 a.m.-7:00 p.m. daily. Violation type: misdemeanor per day. Max penalty: $1,000 fine and/or 6 months jail. Off-hours exception: City Engineer consent required. Weekend schedule: same as weekdays.

Construction outside the 7:00 a.m. to 7:00 p.m. window without City Engineer authorization is a misdemeanor under § 5-16.02, chargeable for each day the work continues. Under the Code's general penalty section, § 1-2.02, a conviction carries a fine of up to $1,000, up to six months in County Jail, or both. Neighbors can report ongoing violations to Code Enforcement or the Police Department for citation.

Vehicle Noise

Simi Valley makes it a public nuisance to race an engine or bring a vehicle to a sudden, tire-screeching stop that produces unreasonably loud noise, at any hour of the day, under Municipal Code § 5-16.02(g). Violators face a misdemeanor charge for each day the conduct continues.

Key details: Time restriction: none, applies at any hour. Standard: unreasonably loud engine or tire noise. Violation type: misdemeanor per day. Max penalty: $1,000 fine and/or 6 months jail. Distinct from: § 5-16.02(d) engine curfew (excludes street vehicles).

Racing an engine or squealing tires hard enough to produce unreasonably loud noise is a misdemeanor under § 5-16.02(g), chargeable for each day the conduct continues. The Code's general penalty section, § 1-2.02, caps punishment at a $1,000 fine, six months in County Jail, or both. Repeating the conduct after a Peace Officer's warning is treated as evidence of malicious intent under § 5-16.02(k).

Decibel Limits

Development within Simi Valley's Mixed-Use (MU) Overlay District must meet numeric noise standards under SVMC Section 9-44.105(D)(12): 63 dB Ldn outdoors and 45 dB Ldn indoors. Projects meet those limits with minimum Sound Transmission Class ratings and an acoustical engineer's report, and commercial uses inside a mixed-use building cannot operate between midnight and 6 a.m. without a Conditional Use Permit.

Key details: Outdoor limit: 63 dB Ldn in outdoor living areas. Indoor limit: 45 dB Ldn in interior living areas. Residential-to-residential rating: STC 50 minimum. Residential-to-commercial rating: STC 60 minimum. Late-night commercial use: Barred 12 a.m.-6 a.m. without a CUP.

A mixed-use project that opens without the required STC ratings or acoustical report on file is out of compliance with its approved plans, and the Director of Environmental Services can withhold final building sign-off until the documented sound measures are verified as built. A commercial tenant operating between midnight and 6 a.m. without an approved Conditional Use Permit is operating in violation of Subsection (D)(12)(b) and can be cited or have its permit conditioned or revoked.

The Bottom Line

Simi Valley's noise ordinances rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Simi Valley is broadly strict or permissive.

These rules come from Simi Valley's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.