Unfortunately there is no set Per Square Foot price on homes in most areas these days. Even two subdivisions next to each may not come close.
The best way to get an idea of what a given property is worth is to run some comparables. A realtor would be able to help you with that. Don't hesitate to hire one - you will find that there are lots of items within each transaction that they will be able to help you with.
Don't hesitate to connect with me if you have further questions.
REALM Real Estate Professionals