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Noise from Specific Sources in Santa Clara County, CA (2026)

3 county-level rules, plus city-specific rules for 3 cities in Santa Clara County, California.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Santa Clara County. If you live within an incorporated city, that city's own rules apply: see the city list below.

HVAC & Mechanical Noise

Unincorporated Santa Clara County caps air-conditioning and air-handling equipment noise at 50 dBA on a neighbor's property line and 45 dBA at a neighboring patio or window, absent a variance.

AC and HVAC Noise Limits in Santa Clara County

Some Restrictions

Santa Clara County Ordinance Code § B11-154(12)

Operating or permitting the operation of any air-conditioning or air-handling equipment in a manner as to exceed any of the following sound levels without a variance: Any point on neighboring property line, five feet above grade level, no closer than three feet from any wall .....50 Center of neighboring patio, five feet above grade level, no closer than three feet from any wall .....45 Outside...

Car Alarm Limits

In unincorporated Santa Clara County, a motor vehicle burglar alarm that doesn't shut off within 15 minutes of activation is a noise-code violation.

Car Alarm Time Limit in Santa Clara County

Some Restrictions

Santa Clara County Ordinance Code § B11-154(10)(c)

Sounding or permitting the sounding of any exterior burglar or fire alarm or any motor vehicle burglar alarm unless the alarm is terminated within 15 minutes of activation.(11)Domestic power tools.a.Operating or permitting the operation of any mechanically powered saw, sander, drill, grinder, lawn or garden tool, or similar tool between 10:00 p.m. and 7:00 a.m. the following day so as to create...

Delivery Truck Noise

Unincorporated Santa Clara County bans loud loading, unloading, and container handling near homes between 10 p.m. and 7 a.m., and at any time if it breaches the Table B11-152 decibel limit.

Loading and Delivery Noise Hours in Santa Clara County

Some Restrictions

Santa Clara County Ordinance Code § B11-154(5)

Loading, unloading, opening, closing or handling of boxes, crates, containers, building materials, garbage cans or similar objects between the hours of 10:00 p.m. and 7:00 a.m. the following day in a manner as to cause a noise disturbance across a residential real property line or at any time to violate the provisions of Section B11-152.(6)Construction/demolition.a.Operating or causing the oper...

Noise from Specific Sources by City in Santa Clara County

3 cities in Santa Clara County have their own noise from specific sources rules. Each link goes to that city's dedicated page with code citations.

All Santa Clara County ordinances

See every category we cover for Santa Clara County: parking, noise, fences, fires, animals, pools, and more.

Santa Clara County Ordinance Hub →