Structures

I feel that buildings are not the proper term for these structures as they will not be something a player will be able to enter.  They will more likely be small structures that could be placed on walls or player constructed sites.  The number of spaces taken up by these structures will depend on the level of the structure and will range from 3 basic blocks to quite a few.  
        -Teleport
As the name suggests these will allow players and vehicles to teleport.  The level of the teleporter will dictate the size of object that can pass through
        -Supply/Store
This structure will allow players to purchase anything that can be carried
        -Communications
This structure allows communication to commanders vehicles and depending on level will dictate how much of a given hex field a commander may see.  In the diagram below dark grey is 1 block high, light grey 2 blocks, and white is 3 blocks high.  Another function of this structure is that when a player interacts with it they can see the overhead map of any hexfield in which their faction has another communications structure.
        -Shield
This structure will provide decreased damage to individuals within the area of effect.  The amount of damage reduced will be a percentage of something like 25% for 1, 50% for 2, and 75% for 3.  Also as the level increases the area of effect will also increase.
         -Turret towers
        -Garage
As of right now this will be a place to store vehicles in the field.  They will probably just be player constructions that can be expanded and shaped as needed.
        -Hanger
This will be similar to the garage, player made for vehicle storage in the field
        -Stealth
This structure will give cover but not protection.  Any players, vehicles, and structures will not be visible to enemy forces while in the area of effect of this structure.
-Stabilzer
-Class changing station