As answered below there are many factors that determine price per Sq.Ft. I have 15+ years New Construction experience, please contact me if you have further questions.
RE/MAX of Naperville
Thanks for using trulia.com to get answers to your questions.
as for the question: the price per sqft is a very relative term because it is depended on the location, size of the house, upgrades and quality of building, but to give you a range you $155-$215 I know this is a big range but again unless we know your situation this will be the best we can do..
Anyhow please call me to discuss further, I work with many builders and I can recommend many based on your price range and location... thanks.
Option Realty Group