A specialized server within a real estate showing management system creates a showing appointment for a showing agent to show a listing and a set of geo-fences around the listing when the appointment is created. At a particular time before the showing, the specialized server notifies a showing agent mobile device to download the set of geo-fences and, when requested, provides the set to the mobile device. The mobile device notifies the specialized server when it breaches a geo-fence within the set. The specialized server determines that the showing has started when the notification and the beginning time of the showing appointment are within a predetermined time range. The specialized server then notifies property electronic devices to turn on.