Systems, devices, and methods for building system controller configuration propagation are described herein. One system includes a first plant controller configured to control a plurality of controllers of a building system on a first channel, wherein one of the plurality of controllers on the first channel is a master controller, and a subset of the plurality of controllers on the first channel are follower controllers of the master controller, a second plant controller configured to control a plurality of controllers of the building system on a second channel, wherein a subset of the plurality of controllers on the second channel are follower controllers of the master controller, and a computing device in communication with the first plant controller and the second plant controller and configured to receive an indication of a parameter modification made to the master controller and communicate the parameter modification to the second plant controller.