Building facilities

 

To build facilities choose one from the left sidebar while having Command Bunker selected.
You can see that the building is getting constructed. When it is finished, click on it and place it with the right mouse button on a free place on the map. The colored building shows you if:
- You are near enough to your other buildings.
- You can build on this terrain.
Unfortunately this feature is broken...
If the building is not available, look at the Facilities dependency tree and check if you have all required buildings.