Cause everyone's doing it!
Your home is a Athletic Time-Lord's Hideout
Your kitchen consists of dilithium-powered food replicators, manned by obedient robot slaves, who are sure to never, ever rebel. I mean, it's preposterous to even consider it. There's a Chocolatessen, which is rapidly becoming your favorite room of the house. Having one is also becoming a trend among your wealthy neighbors. Your master bedroom is decorated to look like the treetop village of the Galadhrim. Your study has every science fiction title ever written. One of your garages contains a life-sized X-Wing fighter, and KITT. (KITT was a gift from a well-meaning uncle.)
Your home also includes a robot repair bay, where your mechanized servants are routinely fitted with new restraining bolts. (It's just a precaution.) Your guests enjoy your home theater with hi-def plasma screen TV, and the thrones you watch it from. Outside is your radio telescope, listening constantly for alien transmissions. Especially invaders. They'll come eventually, even if nobody believes you. (Nobody does.)
Below is a snippet of the blueprints:
Build YOUR Dream House!