Broker: I have a question about the listing on West 19th Street. The listing says Penthouse D, but this building has eight floors, no penthouses.
Me: Um, it would be the top floor.
Broker: You mean the roof? The apartment is on the roof?
Me: No. It's the top floor. The eighth floor.
Broker: I went up there and there are only units A through D. No penthouse.
Me: The available apartment would be 8D, then. Penthouses are generally the top floor.
