One way I have used to check an address is to locate it on Google maps, and zoom in; then switch to street view and see actual pictures of the place. I also use this system to check public garages for overhead height before I show up with my Yukon
An omniscient as Google seems to be, there are streets the Google car haven't driven down, believe it or not! And any pictures are not necessarily current, they are from whenever the Google car happened to drive down the street. Could be a few days (or whatever lag there is from a trip to including it on Maps), or it could be a few years ago.
My whole area used to be skipped, but I see some streets are now covered.
Looking up the address on realtor.com to see if it's up for sale and empty is probably a good 1st cut. I'm guessing that's how the OP found out it was a vacant house.
-Dave