Hi joynton.

In OSM we use the building= tag to record the presence of a building, and the physical type/architecture of the building.
https://wiki.openstreetmap.org/wiki/Key:building

So the building should still be 
building=church
But, I think that was wrong as it appears the structure is a chapel so the tag should be
building=chapel

A different use for a building can be tagged with building:use=. In this case
building:use=residential
