If you are still looking, street directories would be a good idea to pinpoint where he was living and address of the villa
Bye
Althea
Have looked at 1890 NZ WISES DIRECTORY
TURNER JOHN VOGEL, Thorndon Quay Wel, it says Thorndon Quay continuation of Lambton Quay, he is after DAVIES ST Intersect the 41st of 56 names , so sadly building nor mentioned, but by mixture of Misses etc..could easily have been boarding houses???