Unable to answer "What’s the house number of this building?" for https://osm.org/way/103270568 via StreetComplete 53.1:

This isn't a single building. It is a row of terraced houses. The first number is 2 and numbers increase by 2 to 60 e.g. 2,4,6...,58,60. Numbering starts from the SE (bottom right}