I'm back after a somewhat long absense.
I'd get my old physics teacher. He was a zombie expert, even prepared plans to survive an outbreak.
I live in a large town, not many places to go, but i'll outline a few
Old school
Pros- 4 floors - basement (no idea what is down there), ground, first and second. Reinforced glass windows, windows have chicken wire inside in the scool, heavy doors, huge arse concrete slabs for bricks, power generator, food supplies, loads of science labs with full equipment- even uranium for some reason, weapons, gas pumps (makeshift flamthrowers

), ICT rooms with loads of PCs could be usefull, loads of things that can be used for barricades, water purifiers, stairs easy to destroy, lifts can be disabled, loads of room, air purification system, incubators, could easily turn roof into a farm (we had hydroponics stuff as well for demonstrations), transport
Cons - It is only half fenced off for some reason, so ground floor would be a no go.
Gun store
Pros- ..kinda obvious
Cons - food mainly
Military base ~ 20 miles away
Pros - pretty much everything
Cons- Too many people, soldiers likely to shoot on sight, most soldiers are dumb, supplies would run out fast
So i'd probably go for my old school, seeing as how the acrhitects seemed to plan for it to be attacked by zombies.