From what I know, if you have depression (and it seems like you have) it's usually because of several things? Maybe you think that the house is the only reason that you have depression, but in reality it might just be another factor adding to your depression? Maybe it's the fact that you don't have your family or friends around you? Maybe Uni is getting stressful?
Obviously at home you are not in your room all the time, you do different stuff, so maybe not spending all your time in your room at your present place could change your mood?
Maybe try and decorate your room, go out, have more contact with your friends, family.
It takes time before you get used to a new place. If it does not work then motivate yourself by thinking that you will be able to go back home during your Christmas holiday? Or it could be that the weather is affecting you i.e. you have Seasonal Affective Disorder. If it was summer, would it have been better?
Think about it.