I heard that both fort dawnguard and volkihar castle can be upgraded after finishing the respective questlines. I know that castle volkihar can be upgraded, but i have finished the dawnguard questline and cant figure out how to upgrade fort dawnguard. Does anyone know how to ?

http://www.youtube.com/watch?v=6ne1fVhvL00

The answer is no unfortunately, you can't even clean it up

I've moved your thread to the spoilers section.

Do not post spoilers in the Dawnguard General Discussion forum.