Upgrading the European building stock is still painstaking slow. Only around 2% of the buildings are renovated yearly, while a large part of the building stock still originates from the 60s. So why is up-scaling so hard, when we have also very positive cases, such as for example, the Berlin housing corporations who renovated large parts of their building stock already a decade ago? In our EU funded research project P2Endure we found that one inherent problem is that renovation approaches are very dependent on the local typology of buildings and the social fabric of their inhabitants. Therefore, renovation approaches cannot be scaled on a large scale. The alternative are local entrepreneurs, architects and engineers that are willing to develop businesses around developing renovation solutions for specific districts, the type of buildings in this district, and can get in close contact with the locals.