6x6 interior. 13x14x15 exterior. for what it has i don't think i can make it any smaller.
workbench and anvil, furnace w/chest , storage room w/5 chests, enchanting table lvl 30, brewing station w/chest/cauldron, music player w/record chest, and a light switch, the room you walk into is 6x6. has 8 buttons for the 8 features of the house. the redstone is not perfectly done but it works. im not the greatest. i really don't think you can make it any smaller then this and keep all of the features it has. or even make it more compact. if you think you can, try and if you do post it and show me!