To figure the price per square foot a proper Comparative Market Analysis would have to be done. This entails comparing the subject property with those properties that have been sold and those that are active and coming up with a proper price for the subject home.
Subject home - 3 BR/2BA 2000 sq ft Built 2005
Sold homes - 3BR/2BA 2000sq ft Built 2003 350,000
3BR/2BA 1950 sq ft Built 2006 375,000
3BR/2BA 2050 sq ft Built 2006 325,000
Active homes - 3BR/2BA 2050 sq ft Built 2004 350,000
3BR/2BA 2000 sq ft Built 2006 400,000
3BR/2BA 2000 sq ft Built 2005 365,000
Using this as a best case scenario you would compare the sold prices and the active prices to come up with a recommended list price for the subject property.
So, if the recommended list price were to be $350,000 for the subject property and the sq. ft. is 2000 then the price per sq. ft ($350,000/2000 = $175 per sq. ft)
Looking at the homes in Amelia National (70 currently listed or sold) the per sq. ft range is from $113 - $218 per sq.ft.