Abstract: Methods, non-transitory computer readable media, and decarbonization forecasting devices are disclosed that obtain scenario data, building data for building(s), and action data for decarbonization actions. A business-as-usual (BAU) pathway is generated based on the building data, a target pathway is generated based on the scenario data, and a decarbonization pathway is generated based on the action data and a received selection of the decarbonization actions associated with the building(s). A modeling interface is generated that includes an editing pane adjacent to a visualization pane graphically displaying one or more monetary outputs and the energy or emissions difference between the BAU, target, and decarbonization pathways.