A power line communications system and method for multi-dwelling unit structures that provides broadband communications for internet access, voice over IP (VoIP), streaming video, audio, and other high speed applications and services is provided. One example embodiment includes a first communication device comprising an upstream port and a downstream port. The embodiment also includes a plurality of second communication devices with each second communication device configured to provide communications to user devices located on a different floors. The second communication devices may each include a low voltage power line port configured to communicate with a plurality of user devices via a low voltage power line and a second port for communicating with the first communication device. The first and second devices may also include router functionality.