We are aware that the realization of nano-to-meter scale automated building will require many more years of research in the areas of biotechnology (bionanorobots), nanomaterials (3D CNT arrays), physics (light projector), and construction informatics (detailed and appropriate building information models and modeling tools, building technology system). Intermediate results will probably lead to useful applications (e.g. bionanorobots producing building materials based on cellulose), and alternative concepts will surely arise with different solutions for production of carbon nanomaterials (e.g. nanomanufacturing based on self-assembly). Alternative approaches to building control, like intrinsically controlled processes, where bionanorobots would only follow internal programs and decide their actions according to information exchanged with their neighbors and data they would sense from their close surroundings might prove to be a better way. Alternative ways will, however, open new questions. In the intrinsic variation of the n2m building concept a new problem would emerge on transforming an exact digital model of a building into local bionanorobots models and programs. This could alter the presented concepts in the future, but not the ecological goals that have been set and which should bring the building industry to a clean and sustainable way of future building, based entirely on the building information model, information flow from the model to each bionanorobot, on the nanotransformation of matter, and on the materials existing on site. If this paper helps motivate researchers to focus their work to find solutions for the required technologies, as well as the building industry to believe in the need and the ability to change the building production, it has achieved our first important goal.