history: My dog doesnt bark unless he sees strangers.  My roommate moved out last weekend and lately my dog has been barking/growling at our basement door.  I am the only person living in the house. My roommate recently moved out of my house so now it is just me and my dog.  My dog is really nice and doesn't really bark unless he sees a stranger coming up to the house.  Lately he has been sitting at the top of the steps to the basement and growls/barks.  However_comma_ there are no windows to the basement and he wouldnt be able to see into the basement.  I have no idea why he has been barking at that door lately.
current: wow that is a lot to take in.  get a muzzle
next: I'm not bothered by him barking.  As someone who watches a lot of scary movies it is more of a worry factor that someone is down there than anything.