For the next couple of weeks we will be checking out some homes in the most expensive zip codes in the United States, up today, 33404. This zip code is is in the Riviera Beach/Singer Island section of Palm Beach County, Florida and has a median price of $2,890,000 with an appreciation rate of 563% since 1990. Singer Island was founded by Paris Singer, the Singer Sewing Machine company founder who, rumor has it, bought the island as a present for his mistress.

Much of the Singer Island area is given over to condominiums which so far don't seems to have suffered the real estate disaster that has plagued so many Florida condominiums. Perhaps this is because there is only so much of Singer Island to go around. This condo is in One Singer Island, a new complex stocked with amenities that include a private and enclosed parking garage, lobby with a grand salon, social room and Versace patio, private theater, wine room, billiard room, fitness center and a pool and spa deck. There are just 15 residences in the building. The first five floors have two residences per floor. The top five floors have one "ocean to intracoastal" penthouse each. This unique unit is the top full floor and it has a truly dramatic feature, a spiral staircase leading to your own private rooftop terrace with a lounge area and sheltered hot tub. This apartment is listed at $5,995,000.