Unable to answer "How many levels above the basement does this building have?" – house number 315: Detached House – https://osm.org/way/761871218 via StreetComplete 62.1:

This is in fact several buildings close together.

Attached photo(s):
https://streetcomplete.app/p/323394.jpg
https://streetcomplete.app/p/323395.jpg
https://streetcomplete.app/p/323396.jpg