Well, in this case there is a one-to-one relationship, but whatever...

Why did you revert my change? I did exactly what is recommended to do in osm.wiki/One_feature,_one_OSM_element (first example of bad situations).
Also, could you write better changeset comments than "fix", especially when you revert someone else’s changes?

Actually, what I did is exactly what is recommended to do in the first exemple of bad situations at osm.wiki/One_feature,_one_OSM_element

I assumed that we don't need both a node and an area for each building, as per the "one feature, one OSM element" policy, so I moved the adresses to the buildings. But maybe I have misunderstood this "one feature, one OSM element" policy?