San Leandro, CA Noise Ordinances: Vehicle Noise (2026)

Section 4-1-1115(c) of the Noise Ordinance restricts motor and vehicle noise that conflicts with nearby residential uses. , the sustained operation or use of any electric or gasoline-powered motor or engine is unlawful, and the same curfew covers the repair, modification, reconstruction, testing or operation of an automobile, motorcycle, sweeper, vacuum, public address system, whistle muffler, motorized scooter, or other machine or mechanical device. The only way to run such equipment during those hours legally is to fully enclose it in a sound-insulated structure so that no noise or sound is plainly audible from any residential property line, an exacting standard that effectively rules out working on a car or running a generator outdoors overnight near housing.

weekend window. There is no separate provision in San Leandro's code for vehicle mufflers beyond this general motor-and-engine curfew: excessively loud exhaust or engine noise during the restricted hours is enforced the same way, as a violation of Section 4-1-1110's general prohibition and Section 4-1-1115(c)'s specific nighttime bar. Enforcement proceeds as a public nuisance under Section 4-1-1130, abated through the hearing and correction procedures of Chapter 1-12, and the City Manager may grant a temporary compliance exception of up to six months under Section 4-1-1125.