Nasyim Segal, Broker Associate
Boulevard Realty http://www.SegalRE.com
Best of luck to you!
Some less upscale communities might allow the home to be build for far less than $100 a sqft. Neighborbhoods that typically have nicer features in their homes such as higher ceilings, upscale floorings like hardwoods and upgraded kitchens can push that dollar amount to $100 or higher.
Speak with some remodeling companies and your insurance agent to see what they say and this should give you a ballpark figure. Good luck with the rebuild!