The Penthouse is on the top floor of Surfer's Paradise Ridgemount Resort. It houses the Ridgemount family (and possibly Rosie). The Penthouse has a dining room, a kitchen, a spacious living room, an outside pool, rooms for all members of the Ridgemount family, bathrooms, and Mr. Ridgemount's office. At the end of the hallway is an elevator which leads down to the main hotel.
- Since Rosie's never shown living at the staff house and judging from her comment to Lo about not wanting to live in pig-sty in the second episode, it can be assumed that she probably lives in the hotel's penthouse (she certainly lives somewhere at the hotel).