Unable to answer "What’s the house number of this building?" – Residential Building – https://osm.org/way/1007352032 via StreetComplete 63.0:

The southeastern end of the row is 1-7 Victoria Terrace, The Western end before the king in the buildings is 33 South end house. 
The other side of that kink is 25 29 and 31. There's no sign of 27