Unable to answer "What’s the house number of this building?" for https://osm.org/way/200784964 via StreetComplete 54.0:

this is not a separate building. Part of 25. Contains 1 above ground level and one below ground parking garage level. Also, the hausnr is "25, 27" not "25".

Attached photo(s):
https://westnordost.de/p/176119.jpg