Home & Business Alarm Systems Temecula Valley

Temecula Valley’s Trusted Home & Business Alarm Systems

Founded in 1971. Serving the Temecula Valley since 1985. A-Bell Alarms is a second-generation, family-owned alarm company providing home and business alarm systems in Temecula, Murrieta, Menifee, Wildomar, and Southwest Riverside County. We handle custom installation, 24/7 professional monitoring, and service for existing Honeywell and Ademco systems. Chris Sizemore personally handles every installation and service call.

Temecula Valley home and business alarm systems - A-Bell Alarms
Resideo ProSeries alarm systems installed by A-Bell Alarms in Temecula Valley

Business & Home Security Systems & Solutions

Alarm System Installation & Monitoring for Homes and Businesses

A-Bell Alarms has been protecting homes and businesses in the Temecula Valley for over 55 years. We are a Resideo Pro and First Alert Pro Premier Partner, which means every system we install uses the Resideo ProSeries platform — the same technology trusted by security professionals nationwide.

We are not a call center. When you call A-Bell, you reach Chris or Kathy Sizemore directly. When a technician shows up at your door, it’s Chris. That’s the difference between a local alarm company and a national chain

Why Homeowners and Business Owners Choose A-Bell

  • Custom-designed alarm systems — not a one-size-fits-all kit off a shelf. Every system is designed for your property, your routine, and your priorities.
  • 24/7 central station monitoring through Alarm Watch, with immediate dispatch for intrusion, fire, carbon monoxide, and environmental alerts.
  • Honeywell and Ademco alarm service — we are one of the few companies that still services legacy Ademco and Honeywell VISTA and LYNX systems. If you have an older system that another company won’t touch, call us.
  • Monitored smoke detectors and fire detection — if your homeowner’s insurance is requiring monitored fire detection due to California fire zone map changes, we can help you stay compliant and keep your coverage.
  • Smart home automation — locks, garage doors, lighting, and thermostats controlled through the Total Connect app on your phone.
  • Alarm system takeovers — switching from ADT, Brinks, Vivint, or another provider? We can often use your existing equipment and move your monitoring to local, personal service.

Business Alarm Systems

Protect your company’s most important assets

Custom commercial alarm systems for Temecula Valley businesses.

Intrusion detection, 24/7 monitoring, video verification, and remote access through Total Connect. From a single storefront to a multi-location operation, we design systems that fit the way your business runs.

Home Alarm Systems

Secure Your Home and Protect What Matters Most

Protect your family with a home alarm system designed for the way you actually live.

Intrusion detection, monitored smoke and carbon monoxide detectors, security cameras, video doorbells, and smart home automation — all managed from the Total Connect app on your phone.

Service Your Existing Honeywell or Ademco Alarm

Have an existing security system?

Upgrade Your Security Service with A-Bell Alarms

Have a Honeywell or Ademco alarm system that needs service, repair, or new monitoring? A-Bell specializes in legacy alarm systems that other companies won’t touch. We can also take over monitoring from your current provider — often using your existing equipment.

Frequently Asked Questions About A-Bell Alarms

A-Bell Alarms serves Southwest Riverside County, including Temecula, Murrieta, Menifee, Lake Elsinore, Wildomar, Canyon Lake, French Valley, and Winchester. We install and service home and business alarm systems throughout the Temecula Valley.

California requires an Alarm Company Operator license from the Bureau of Security and Investigative Services to legally install, service, or monitor alarm systems. A contractor installing alarm systems also needs a CSLB license with the appropriate classifications. You can verify any company's license at bsis.ca.gov and cslb.ca.gov. A-Bell Alarms holds ACO License #3875 and CSLB Contractor License #651728 with C-7 Low Voltage Systems and C-10 Electrical classifications. If a company cannot provide an ACO license number, they are not legally authorized to install or monitor alarm systems in California.

Yes. A-Bell Alarms specializes in servicing and monitoring existing Honeywell and Ademco alarm systems, including the VISTA and LYNX series. We can repair components, upgrade your monitoring, and extend the life of your current system. We are one of the few companies that still services legacy Ademco equipment.

Yes. A-Bell Alarms handles alarm system takeovers and monitoring conversions. In many cases, we can use your existing Honeywell or Ademco equipment and switch your monitoring to local, personalized service. You get 24/7 central station monitoring through Alarm Watch with the benefit of dealing directly with a local, family-owned alarm company.

Yes. If your homeowner’s insurance is requiring monitored fire detection due to California fire zone map changes, A-Bell Alarms can install professionally monitored smoke detectors connected to 24/7 central station monitoring. This meets the insurance requirement for monitored fire detection and helps you keep your coverage. Call (951) 302-3100 to schedule an assessment.

Many homeowner's insurance companies offer a discount for homes with professionally monitored alarm systems, and some insurers in California fire zone areas now require monitored fire detection as a condition of coverage. A-Bell Alarms installs professionally monitored smoke detectors connected to 24/7 central station monitoring that meet these insurance requirements. After installation, we provide the monitoring certificate your insurance company needs to apply the discount or confirm compliance. Call (951) 302-3100 to find out what your insurer requires and how we can help.

A-Bell Alarms is a second-generation, family-owned alarm company founded in 1971 by Gene Sizemore. Today it is owned and operated by Chris and Kathy Sizemore, who have served the Temecula Valley since 1985. Chris personally handles every alarm system installation and service call. A-Bell is a Resideo Pro and First Alert Pro Premier Partner, a 2021 Temecula Valley Business of the Year, and holds a BBB A+ rating.

Temecula Valley’s First Alert Pro

Chris and Kathy Sizemore, owners of A-Bell Alarms — Temecula Valley's home and business alarm systems experts

Kathy and Chris Sizemore — Temecula Valley’s “Dynamic Duo of Security”

Temecula Valley’s

First Alert Pro

A-Bell Alarms is a First Alert Pro Resideo Premier Partner serving Temecula, Murrieta, Menifee, Wildomar, Lake Elsinore, Canyon Lake, French Valley, and Winchester. That certification means every system we install meets the highest standards in the residential and commercial alarm industry. You’re not working with a subcontractor or a rotating crew. Chris and Kathy Sizemore are the owners, and Chris personally handles every installation and service call in Southwest Riverside County.

Secure Your Peace of Mind with A-Bell Alarms

Over 55 years of protecting families and businesses in the Temecula Valley. Call us or schedule a free consultation.

Ready to experience the A-Bell Alarms difference?