It really depends on what all needs to be done...trim? crown moulding? window frames and sills? is there wallpaper anywhere? If so, that's going to add a lot to the cost because it's very detailed and time-consuming. If it's just rolling the walls over existing paint, it should be only a couple hundred per room for a decent company. With trim/moulding/windows, you may be looking at anywhere from $500-$1000 per room, depending on the variations in size and such. Also, some companies lower the price per room if you're doing a whole house VS one or two areas.
My husband and I HATE painting, and it takes us forever to do it, and it doesn't look like a professional job when we finish, so for us, it's totally worth it to hire a pro to do ours.
at 8:29 AM on Nov. 11, 2010