The focus of this paper is an efficient data usage in order to investigate the economic efficiency of a building element. Decisions in construction management are related to the life cycle of a building. In combination with numerous influencing factors there is a need for a decision support approach, which enables the user to ensure data is available and can be used efficiently to identify the best decision. To meet these challenges, this paper presents a data-based approach for combining different datasets to ensure a comprehensive base for multi-criteria decision support in construction management.