Abstract: A monitoring system that is configured to monitor a property is disclosed. The monitoring system includes a sensor that is configured to generate sensor data that reflects an attribute of the property. The monitoring system further includes a stair lift that is configured to transport a person up and down stairs at the property and that is configured to generate stair lift data that reflects a status of the stair lift. The monitoring system further includes a monitor control unit that is configured to receive the sensor data and the stair lift data. The monitor control unit is further configured to analyze the sensor data and the stair lift data. The monitor control unit is further configured to determine that an event occurred at the property. The monitor control unit is further configured to, based on determining that the event occurred at the property, perform a monitoring system action.