If you are in the mood you can split up every building into separate parts.

Or you can leave them as the are on the map as one connected building.
From my point of view it is a matter of wasting time or getting into small details.
I prefer to leave this kind of drawing as one single building with several addresses.

The buildings are imported from a SDFE dataset and it can be reimported in the future when someone feel it is time to do so.

But if you have the time please feel free to split the building into small parts. (:
I will just say it is a waste of good and valuable time.

I wish you a Happy New Year