Just back to my house; it's occupied by someone else now.. I haven't sold it or bought another one. Yet, it has disappeared from my profile..My house had all my trophies too.
This seems to be the second time something like this has happened (and been reported in the forums), its a very worrying bug.
File a bug report by clicking on the little bug in the upper left corner of the screen when you open the game. You've popped a topic up here so that's good. Contact the person who now owns your house (even if you have to friend them to send them mail) explaining what happened and politely requesting any items that you still had in your house and cabinet. If they're understanding then at least you'll still have some of your stuff if not your house :/
I really hope that this bug is fixed quickly, it's a really nasty one.
This is a cause of great concern. I love my house and my area. I'm also something of a hoarder and have a tonne of stuff in there. I'd be pretty upset to lose it.
Do we know what causes this? I, too, am a hoarder (trying to get IRL friends to play by enticing them with stockpiled goodies) and waited patiently to get the exact house in the exact area I wanted with an easy-to-remember house number. I would be gutted to log in and find out I had been evicted and lost all my goodies. :(