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, 94920 . This zip code is in the Bay Area of Northern California encompassing Tiburon and Belvedere. This wealthy seaside enclave has a median price of $2,192,000 and a healthy appreciation rate of 282% since 1990. We've highlighted a variety of homes in the area before including the Belvedere home belonging to businessman Tom Perkins and Andre Agassi's Tiburon estate.

Tiburon incorporates most of the TIburon Peninsula in Marin County, California and the city of Belvedere occupies the south-east part of the peninsula. The most expensive estate in this zip code is an 8.5 acre estate listed at $38.5 million. The home I chose for today's example is a less pricey but very charming. The compound on the water includes a main house and a two-bedroom guest house, a smaller one-bedroom boat house and there is a one-bedroom, one-bath au pair suite above the three-car garage. The home with gorgeous seaside views is listed at $11.5 million.