commander can you clarify more 

if you mean black sites then no you cant build them 

new black sites appear randomly on the map your alliance has to capture them ( you can capture other alliances black sites )

if you mean your alliance HQ 

GhstEagle556 said:

Alliance HQ how do you build and what are the requirements?

Please read HQ tutorial HERE.

davidcoc301 said:

How can we build a Black Si

You should just wait for a week and after that you will be offered to place your HQ on the map. Black Sites — it's different feature, you can't build them, you are able to capture them.