If you had to guess what the most expensive zip code in New Jersey is, what would you guess? I was able to guess this correctly because I'm a big This is Us fan and I used to marvel at Randal's home early on in the show...it was a breathtaking property is Alpine, New Jersey and that is yet again the top zip in our state. That average cost of a home is $2 million dollars. There are two more zip codes, one at the Jersey Shore and one in South Jersey...can you guess those?