I think that Dale's response is accurate. There are so many things to consider when calculating the cost of building a new home. I have owned a construction supply company for quite some time. I have seen homes built from $70 per sqaure foot up to $200 per square foot and beyond.
I would say an average stick framed home built to normal standards can be estimated at around $100 per square foot. If you start adding expensive finishes, this cost will do nothing but rise but this is a good starting point.