John here is a site for an above ground shelter from FEMA you can tell your neighbors is a pool house / storage shed.
http://www.officialdisclosure.com/SM-11.pdf
Just a word of warning though when people get it in their minds to do the shelter thing they have thoughts of being in the shelter for months emerging into a brave new world to carve out their place in it. To eliminate these ideas try a small experiment, lock you and your family in the house for 3 days with no lights, phones, water, heat, cooling, or any of your modern conveniences and watch what happens.