Value creation mix is the magic word. In the course of urban concentration, rents for residential space in cities are already above EUR 20 per square meter. Taking such usage concepts into account in the tenant mix, allows a suitable mixed calculation for vertical buildings. In addition to apartments, office and other use concepts such as fitness, dance studios or hotels are also are well imaginable on the upper floors. All on spaces that would be rather difficult for the classic retailers, but which enhance the overall location which also raised the potential on spaces that are more suitable for retail. The curation of the tenant mix determines the profitability of the property. In Berlin, for example, ECE has converted the top parking deck of a city mall into a hotel, since this has a higher attractiveness and benefit in the overall calculation than the parking deck alone (especially with declining individual car traffic in urban locations).