First question would be what is it that you want to build? A ranch is usually more expensive than a colonial, which is more expensive than a bi-level. And what type of construction? Modular, stick built, Green, etc.
Could range anywhere from $125 to $275 and above. If you are looking for a high end builder call George Sifre of Seakill in New Paltz, NY. He has built many house in the Hudson Valley.
If you are looking for modular call them direct for quotes. Try to google the manufactures in Pa.