Custom Alarm is a locally owned and operated, security-minded company located in Rochester, MN. Custom Alarm was started in 1 ... 968 with only three employees and has grown to over sixty employees, dedicated to taking care of the customer. We specialize in fire alarm systems, intrusion, video surveillance, and access control for both residential and commercial owners. Custom Alarm is the trusted security leader and award winning, community-focused company committed to leveraging technology in finding solutions to our customers' needs and dedicated to a high level of customer service. read more