A "penthouse unit" refers to a luxurious apartment or living space located on the top floor or rooftop of a building. It is usually spacious, exclusive, and often offers a great view. Full definition
There are also 2 - story, 4 - bedroom penthouse units with panoramic lake views. (oakshotels.com)
Bright and spacious penthouse unit in contemporary Mediterranean Courtyard Style building with beautiful city and Hollywood Hills views. (zoopla.co.uk)