The purpose of this paper is to report on an IBPE case study based on the practical experience of an architectural firm. At the very beginning of a new life cycle for the future office building of a car manufacturer, the performance of their existing office building was evaluated. Based on these results, state-of-the-art design criteria will be developed during the following programming phase, finally leading to the design of the new office building. The paper offers insights into the actual process of participatory building evaluation, programming and design by reporting on experience with techniques and instruments from the “IBPE Universal Toolkit.”