It takes about one side quest for the vampires for the broken courtyard entrance to be fixed.
Once you beat the Volkihar Vampire quest line you can approach your advisor subordinate and he'll ask your permission to restore your castle. but the castle does not upgrade other than opening up one portal to the courtyard. If you want to upgrade the castle completely, go to the steam workshop and download the best and most comprehensive bug free mod made to date. Castle Volkihar Redux. You can actually google it and find it.
the code to castle defense upgrade is upgrade it will put you up to level 37
the code to castle defense upgrade is upgrade it will put you up to level 37
Go to darkovia and click on the vampire castle (you have to be at least level 5)
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First upgrade your miners bag then upgrade your castle hit points by one.
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In a window
throw the window
you go to the darkova wood's and enter the vampire queens castle and become a vampire
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You buy it in the Upgrade Igloo catalog!