Proudly Serving

Northern California, Sierra Nevada Mountains, Greater Sacramento, San Joaquin Valley, and Bay Area

Signal Service began in the small Sierra Nevada Mountain town of Murphys, California but over the past 45 years has expanded throughout all Northern California. We measure our success by the quality of our relationships and the service we provide our customers. Our professional team has years of experience, and as a family business, you still receive warm and friendly service. Our technicians live throughout our service territory to promptly respond to any service issue.

Counties we currently service: San Francisco, San Mateo, Sonoma, Marin, Napa, Yolo, Solano, Contra Costa, Alameda, Santa Clara, Stanislaus, San Joaquin, Sacramento, Sutter, Placer, El Dorado, Amador, Alpine, Calaveras, Tuolumne, Mariposa and Merced.

Local & Family Owned Business Since 1979


For home security, Signal Service provides all the options you need to protect your property and stay safe. We understand how important it is to protect the ones you love, which is why we offer reliable solutions and friendly, knowledgeable service. From burglar alarms and fire alarms to heat, smoke, and carbon monoxide detectors, we do it all. With CCTV surveillance and video service, you can monitor your home 24/7 no matter where you are. Call Signal Service today to learn more about our home security solutions—including Video Service!

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Who We Serve

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Aamdor County Unified School District
Adventist Health Sonora
SS_clientlogos_0005_Ironstone Vineyards
Ironestone Vineyards
SS_clientlogos_0000_Sutter Amador Hospital
Sutter Health Hospital
SS_clientlogos_0002_Skinner Vineyard and Winery
Skinner Vineyards & Winery
SS_clientlogos_0006_El Dorado County Office of Education
El Dorado County Office of Education
SS_clientlogos_0004_Marshall Medical
Marshall Medical Center
SS_clientlogos_0003_Sierra Hills
Sierra Hills Food Market
SS_clientlogos_0001_Snowline Hospice
Snowline Thift Stores