This doctoral dissertation presents a model to evaluate trade-offs between the energetic
economic and environmental lifecycle performance of building projects. The model is explained
so as to be replicable. The model is then applied for decision-making on different strategies
for existing buildings in Germany. Results from the case-study show that current
state-of-the-art building strategies considerably increase the risk of missing climate change
mitigation targets in exchange to a relatively small economic improvement over innovative
building strategies.
