In order to reach zero energy consumption of the current building stock, adding a new insulating envelope with Renewable Energy Sources onto the existing building is necessary. This can be achieved by using prefabricated modules, automation and robotics. Since the topic is complex, three main subcategories were defined: Data Flow, Off-site Manufacturing, and On-site Installation. Latest studies suggest that there are still gaps in the way of achieving economically feasible solutions. In other words, there must be a reduction in the working time achieved in each sub-category. In this paper four different solutions are explained: 1) online data processing of the building, 2) automated layout definition, 3) accurate measurement with targets and 4) Automated CAM generation and Manufacturing. The solutions are still being developed but the current results are promising.