Alarm Systems Outside City Limits Need a County Permit

A security alarm outside any incorporated city in Williamson County should be registered with the Sheriff's Office. The rule is one alarm permit for each system you own and use at that address.

That can include a rural house, shop, barn, or small storefront. Monitoring does not make the permit issue go away. An alarm panel is easy to forget until it starts sending calls.

Handle the Sheriff's Office application, renewal, and payment details when the system is new. If the address is inside a city, ask that city about its own alarm rules instead.