Unable to answer "What kind of building is this?" for https://osm.org/way/471247696 via StreetComplete 43.2:

Hausnummer 20 existiert hier nicht.

Attached photo(s):
https://westnordost.de/p/100170.jpg
https://westnordost.de/p/100171.jpg
https://westnordost.de/p/100172.jpg