What is the average cost per sqft to build a home in Williamson Co tn
Making the world better, one answer at a time. The average cost per square foot to build a house in Williamson County, Tennessee is about $147. This means a 10,000 square foot house would cost about $1,470,000 to build.he average cost per square foot to build a house in Cecil County,  Maryland is about $137. This means a 1,000 square foot home would  cost about $137,000 to build.