Future tasks for the building trade in Germany will be more and more a combination of the fields of revitalization and new building projects. Prerequisite for computer-aided planing for existing buildings is both, the use of onsite computer-aided measurement and the integration of all specialists involved in the building process. Existing approaches for this problem are not yet satisfying. The aim of this research project is twofold: to design a practice-relevant software concept and to develop various prototypic systems, for a structured way of capturing and organizing building-related information about existing buildings in digital form. The research is oriented towards existing buildings, in particular residential and commercial buildings. This project is a special branch of SFB524. The project is founded by “Deutsche Forschungsgesellschaft (DFG)i.