Hello,

I had a look after your comment.  There is no need to split a building solely because there are many addresses.

As far as I can see, this looks like one single structure.  The inventory of buildings gave it one single ref number in UrbIS (8726367), so it should be all right as it is.

Just one thing for addresses.

* The best way to map is to have single points for addresses (one address = one point).  If you know the accurate location of doors, this is even better, then you can snap the point to the edge of the building, exactly where the entrance door is located.
* An address is only the street name and the house number.  Please do not add the extra "postcode=1170" or "city=Watermael-Boitsfort", those fields are no longer required in Belgium because we use areas for all the addresses now.
* Since the addresses are on points, there should not be address tags to repeat the same information on the building itself.

We made all the fixes here.