Unable to answer "What is the house number of this building?" for https://osm.org/way/288132678 via StreetComplete 31.0:

This building does not exist. There is, however, a smaller building that appears to be a maintenance shed of some sort.

Attached photo(s):
https://westnordost.de/p/32729.jpg
https://westnordost.de/p/32730.jpg