You should change the force zombie color to white, just so it looks more like a ghost. The whole house thing has been done before...a lot, to be honest. There isn't really any outstanding features of the map, but it doesn't look bad. Its a well-done retread.
Seriously, stop double posting. I'm going to be honest with you, the map looks really not-housy and untidy from the outside, but from the inside it looks much better. My only concern is that if someone plays this map with a different gametype, it'll become a spawn-killing camp-fest. Can the humans get out of the house? It's good for what it is, but you could have made it so much bigger. Consider making a larger V2.