I realy enjoy the dungeon area of your house and it looks perfect for what u inted to use it for. However the top floor could use somework in my opinion. One area I would work on for that is the general shape of the main floor id try to make it symetrical by removing some of the pointless rooms and only having 4 gardens there and then moving some of the usefull, but not frequently used that dont need quick acsess to a top floor. Also try and get the portal rooms relativly close, saves you time when your on different spell books using house tabs for everywhere ;). Good spot for the chapel, dont move that and definelty build your own G-Alter on the main floor.