In the current situation a new Building is constructed by calling its constructor:
Building(Colony c, BlockPos p);

It is currently being called from:

• AbstractBuilding.createFromNBT(final Colony colony, @NotNull final NBTTagCompound compound)
• Many of the Constructors use it as super(Colony c, BlockPos p). (This should stay)

Solution:

• Create a singleton Factory class that holds IBuildingConstructors which create a new Building from the given colony and location.
• Create a default construction class that wraps the current method of creating new instances.

@OrionDevelopment Is this still something you are working on or no longer needed?
Since it's been a year already.
I'll close and you can reopen if needed with comments?