me_and
Unable to answer "What is the house number of this building?" for https://osm.org/way/198978817 via StreetComplete 41.2:

This is part of a building site, and looks to be part of the same building as the slightly larger one to the north (or possibly both structures on the map were demolished to form a new building).

Attached photo(s):
https://westnordost.de/p/85424.jpg
https://westnordost.de/p/85425.jpg