Ethereum:
Quote
TechCrunch founder Michael Arrington remotely purchased a $60,000 apartment in Kiev, settled via smart contracts and in Ethereum cryptocurrency and PRO (Propy) tokens — marking the first-ever cryptocurrency transaction in Ukraine and the first real asset transfer via blockchain
source: Link
Bitcoin: first single-family home sale in Texas involving bitcoin, announced in 2017 the parties involved completed the transaction with BitPay Link
And apparently there is property website which deals in crypto you can check it out http://bitcoin-realestate.com/ ... do some research on your own and you will see lots of such sources.