I doubt they're living there now. Obviously there isn't any way in or out of the house, but also there is no power lines, water pipes or sewer pipes going to/from the property.

I similar situation happened in my home town years ago after they legalized gambling. The city promised a casino land that it hadn't yet acquired. There was a business located there and they guy refused to move. The casino ended up having to build a walkway that went over his land.

Then I could go play a game of scrabble with a friend and we could beat the record by just throwing random letters down and not challenging each other.