The residential building environment and the belonging values creation network consisting of several in-terdependent actors has not obtained much attention from the field of science. Even though much litera-ture exists about the diffusion of innovations (e.g., Rogers 1995), the diffusion process of innovations in the residential building system is not fully understood. Hence, the enormous potential to reduce CO2-emmsions can not be utilized. In Switzerland, a research project tries to elaborate the different processes in the building environment in order to provide policy interventions based on a system dynamics model. Based on this research project, we present the interconnections between the different actors in the system. Thereby, we want to depict the inner life of each important actor group via a details simulation model. In the current version of the paper, only some details about the individual building owners can be provided. For the other actors, empirical survey research is in the process of being executed, after the completion of which dedicated models can be presented, different policies tested and implications discussed.