Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for identifying, at a monitoring system, a location of a device panel, the device panel being configured to communicate with a position module of the monitoring system; obtaining, by the position module, location information for a plurality of anchor devices, each anchor device of the plurality of anchor devices being located within a predefined area of a property; determining, by the position module, a respective location of each anchor device within the predefined area based on analysis of the location information for the plurality of anchor devices; and determining, by the position module, a location for a sensor in the predefined area based on the respective location of at least one anchor device.