This is a house I've been chipping away at for a number of years and I thought it was time to see what other people think.
The house is about 402x183 blocks. Rooms include: the entryway, living room dining room, kitchen, pantry, game-room, library, rec-room, fireplace room, and tinkering workshop. (I challenge you to find them all).
Not all of the mansion is furnished but a good part of it is.
This map was made for 1.7.10 but any version newer than that can probably be used as well since it's just a house and there's nothing that might be rendered unusable by a newer version.
Download map Computernaut Estate