NO LA do not require a license to install an alarm system (RESIDENTIAL). However, if you choose to become a Monitoring Alarm Station or distributor of Monitoring contracts, then the story changes. You would need to have an Level 2B alarm Technician on staff that lives in a 25 mile radius. Sound crazy? Yeah I know. Also if you're installing alarm systems in a commerical building, it get even worse and more expensive. No commerical Building for us. (at least not now)