In 2014, one person tried to sell his house for 877.5 bitcoins (or $ 8,599,500 in today's prices). The article also says that so far, no houses have been sold for the bitcoins.
In the United Kingdom you can buy and sell houses with bitcoin, some realtors have expressed some serious interest in it.
I just quickly skimmed the article I read about it, but there seemed to be some nice tax advantages if you buy a house with bitcoin.