HVAC noise in Santa Clara County must comply with 55/45 dBA residential limits at neighbor property lines. New installations often need acoustic screening and setback compliance.
Heating, ventilation, and air-conditioning equipment at single-family homes in unincorporated Santa Clara County is treated as continuous stationary noise under Division B11 of the County Code. The receiving-property exterior limit is 55 dBA daytime and 45 dBA nighttime, with a 5 dBA penalty if the unit produces tonal or pure-tone noise typical of aging compressors. Setback and screening requirements in the Zoning Ordinance (typically minimum 3 feet from side-yard fences for condensers) apply when new equipment is installed under a mechanical permit. Building inspectors verify manufacturer sound-rating data during plan review for pool heaters and whole-house HVAC replacements. Heat pump retrofits promoted by BayREN and PG&E incentive programs are usually quieter than the units they replace but still need proper placement. Code Enforcement accepts noise complaints and can require mitigation including vibration isolators, acoustic enclosures, or relocation.
Contact your local code enforcement office for specific penalty information.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Palo Alto, CA
Palo Alto Airport (PAO) enforces a voluntary curfew and noise abatement procedures, with FAA preemption limiting local authority over flight operations.
Palo Alto, CA
Palo Alto prohibits amplified music audible beyond the property line during quiet hours and requires a special event permit for outdoor amplification in publ...
Palo Alto, CA
Palo Alto enforces strict decibel limits by zone under PAMC 9.10.040: 60 dBA day / 50 dBA night in residential, scaling up to 70 dBA in manufacturing zones.
Palo Alto, CA
Palo Alto permits construction Monday-Friday 8am to 6pm and Saturday 9am to 6pm, with no work allowed on Sundays or holidays under PAMC 9.10.060.
Palo Alto, CA
Palo Alto requires encroachment permits for new driveways, regulates curb cut dimensions, and prohibits blocking sidewalks or adjacent driveways under traffi...
Palo Alto, CA
Palo Alto restricts RV, trailer, and boat storage on public streets and requires screening for large recreational vehicles on residential property under zoni...
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