Welcome to Denalect

I founded Denalect Alarm in 1969. We are a local, independent company providing helpful service for the security needs of businesses and residents of Northern California.

I guarantee you that Denalect will quickly and courteously respond to your safety and security needs. We’re one of the few companies that provide live, friendly operator service 24 hours a day.

Our headquarters in Walnut Creek house our company operations including system design, customer service, installation, monitoring and business operations.

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24 X 7 Service and Monitoring

For more than 40 years, Denalect has helped Bay Area residents maintain an electronic vigil over their properties and homes.

From our Central Station (an Underwriters Laboratory compliant facility), we monitor businesses, schools, homes, ranches and government offices 24 hours a day.

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Backup Power and Radio Reliability

You can rest assured that even after an earthquake or power outage, Denalect is there with our 24 X 7 backup power generators.

In fact, during the Loma Prieta earthquake, every Denalect customer remained fully armed.

With our Ultra Security package you can also have radio reliability — above and beyond landlines or mobiles.

From San Rafael to Livermore and Pleasanton, we’re there for your security.

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Professional Grade, Reliable Equipment

Denalect regularly reviews current and emerging alarm technologies from established vendors as well as innovative new suppliers.

With 40+ years in the industry, Denalect benefits from its ongoing participation in Bay Area, California and National alarm associations — with a focus on the highest standards.

So, when our installers arrive at your door, you can be confident that your home or business will get the most reliable and best quality equipment on the market.

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Experienced Staff

We like to think our team gives and receives good energy from you, our customers.

For this reason, we have some of the most loyal installers in the business, men and women who respect your home and run a clean shop.




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Professional Trained

Ready to serve you…whether in Concord, Vallejo, Danville, Fairfield or San Rafael.

Denalect installers call ahead, confirm appointments, discuss your specific environment, install all sensors securely and discreetly, check your system, clean up and check back with you for regular service and maintenance.

Denalect is full-service and customer friendly.

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