| I answered this on your other thread, but just for folks who come here only: "apartment" refers to the physical attributes of the dwelling--that it's multiple dwellings (even if only 2) in the same building. It is not a legal definition. It's just a practical one. The same is true for houses, town homes, etc. That word had no legal restriction or definition. It just defines the physical characteristics of the building. There's no LAW about what can be labeled an apartment. And THAT is distinct from the NAME. They can put anything they want on the sign; as Lanzz points out, that's a marketing decision. They could call 'em castles. They could call 'em homes. They could not use a noun at all, and just call 'em "Sherman Hills." Condominium refers to the legal organization of the ownership of units. The sort of individual-ownership-yet-joint-ownership-and-management-of-common-areas organization can occur for apartment buildings and town homes. "multiunit structure" and "land owned in common" are the key phrases. So you can see that you don't even have to have an apt. bldg to have a Condo. Ditto for co-ops, which is what most non-rental NYC apt. bldgs are. And again, you could LABEL something a condo, and it not be; the only law that would come into effect would be possible fraud. But if the sign said "condo" and you went to buy, and they said, "oh, we changed to a co-op; here are the bylaws and legal papers; we just couldn't be bothered changing the sign," there'd be nothing legally wrong w/ that. Perhaps false advertising, but they'd argue that the sign wasn't advertising, it was just the label. | 
