A security system including a sensor communication interface configured to communicate with a plurality of sensors, an output interface, and at least one processor in communication with the communication interface. The at least one processor is configured to: receive, via the sensor communication interface, sensor data from one or more of the plurality of sensors; determine, from a plurality of tiers, a respective tier associated with the sensor data; and determine, based on the sensor data and the respective tier, whether to change a state of the security system. The at least one processor is further configured to: in response to determining to change the state of the security system, change the state of the security system; and determine, based on the changed state of the security system, whether to generate an output via the output interface.