The current buildings in the game have 4 types or classes: civilian, millitary, civil service, and militia. Civilian buildings: house, gas station, laundry, cafe, grocery store, gun store, meat shop, clothing shop, bank, barricaded house, pharmacy, pizza shop and barn.
Military buildings: barracks, aircraft hanger, military tent, watch tower, road block
Civil service: Police station, fire station, hospital, Red Cross tent.
Militia: ATC tower, S.S. Haven, Barricaded house and Kensington camp ground