Because of this, I went ahead and looked up what fantasy/medieval type of building concepts I could find that match the style I'm aiming for.
Interestingly enough, what I was looking for did not come from CG concept artists, rather real life model makers.
Here are the references:
I have also added the necessary details to achieve a more "Warcraft look". The aim was to remove straight lines from wherever it was relevant. Silhouettes need to be exaggerated a bit to make the building look different, interesting.
The next step involves a lot of technical elements, like unwrapping each of the modular pieces for texturing and importing them into the UDK engine.