I just realized that my old middle school is perfect!
*It's got 3 stories, so I can hang out on the third safely
*It has heavy doors, plus various other enclosings that can help stop the zombies
*Plenty of desks, chairs, tables and whatnot to make obstacles for the steps and such
*It's on a hill. Best defense, period.
*I can fit a helicopter on the roof...
I'm fairly certain I can find a lot of good places to hide, plus there should be some CB system or something. And with the PA system, I can flood all the rooms with a sort of white noise that might deterr zombies.