My house is 3 stories high, I'd just climb on the roof
And then call my personal helicopter to take me to my personal island and then I'll hope zombies can't swim.
Also depends if you have muscle or leaf in your body.
There's an old naval facility converted into a place where schools/companies can come over to stay and work on team-building exercises etc not too far from here. Place is pretty big, has lots of places of entry for zombies to come in, buuut, at the same time lots of places to run and hide in and the roofs are perfect sniping platforms.
If fortified well, I'd say it'd make a great sanctuary/last stand lol.