Quality Assurance is also a pretty big cost along with labor and materials. The cost of living in America isn't cheap and the materials you're working with (du

Quality Assurance is also a pretty big cost along with labor and materials. The cost of living in America isn't cheap and the materials you're working with (due to their size and weight) were likely manufactured domestically or, if not, were handled domestically during import. America is also super litigious but I don't believe that contributes significantly to public works due to the limits on state and federal liability.