Noise Ordinances in Union City, CA (2026)
10 verified noise ordinances for Union City, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Quiet Hours
Union City does not set a single fixed nighttime clock. Instead, the Community Noise Ordinance (Chapter 9.40) caps noise at ambient-plus levels around the clock, with a relaxed daytime exemption that effectively makes evenings and early mornings stricter.
Union City Quiet Hours and Nighttime Noise
Some RestrictionsConstruction Hours
Permitted construction is allowed Monday-Friday 8 a.m. to 8 p.m., Saturday 9 a.m. to 8 p.m., and Sunday/holidays 10 a.m. to 6 p.m., provided equipment stays under the chapter's construction noise caps (UCMC 9.40.053).
Union City Construction Hours and Noise Limits
Some RestrictionsBarking Dogs
Union City has no dedicated barking-dog timer, but its Community Noise Ordinance expressly covers animal noise: a dog whose barking creates a 'noise disturbance' or pushes residential noise above ambient-plus-10 dBA violates Chapter 9.40.
Union City Barking Dog Noise Rules
Some RestrictionsLeaf Blower Rules
Union City has no leaf-blower-specific ordinance. Leaf blowers fall under the general Community Noise Ordinance (Chapter 9.40), while a statewide California rule (AB 1346) now bans the sale of new gas-powered units.
Union City Leaf Blower Noise Rules
Few RestrictionsAmplified Music & Events
Union City regulates amplified sound through its Community Noise Ordinance rather than a stand-alone sound-amplification permit law. Amplified music that becomes a noise disturbance or exceeds the ambient-plus limits violates Chapter 9.40.
Union City Amplified Music and Sound Rules
Some RestrictionsAircraft Noise
Union City has no aircraft-noise ordinance and cannot adopt one. Aircraft operations near it, including Oakland and San Jose flight paths, are regulated by the FAA, which preempts local control of airspace and aircraft noise.
Union City Aircraft Noise and FAA Authority
Few RestrictionsIndustrial Noise
Commercial and industrial property in Union City may not produce noise more than 12 dBA above the local ambient at the property line, and the City can require noise inventories and reduction plans from non-compliant sources.
Union City Industrial and Commercial Noise
Some RestrictionsDecibel Limits
Union City sets relative, not fixed, decibel limits: noise may not exceed the local ambient by 10 dBA on residential, 12 dBA on commercial/industrial, or 15 dBA on public property, with the ambient never treated as below 40 dBA.
Union City Decibel Limits for Noise
Some RestrictionsOutdoor Music
Outdoor music in Union City is regulated by the Community Noise Ordinance. Public events and performances up to 80 dBA at 50 feet are exempt only when approved by the appropriate governmental entity; otherwise ambient-plus limits apply.
Union City Outdoor and Event Music Rules
Some RestrictionsVehicle Noise
Union City's noise ordinance restricts vehicle horns and treats excessive vehicle noise as a disturbance, while in-motion vehicle and muffler noise is governed by the California Vehicle Code, which preempts local sound-limit rules.
Union City Vehicle Noise Rules
Some RestrictionsLooking for Alameda County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Union City city rules.
Noise Ordinances in Alameda County →