I think you missed a second example. However, I don't believe a builder can redefine square footage to whatever he wants it to be. I think this is a scam assuming people won't take it to court, but any reasonable judge should throw it out. If not, I will start paying checks with some small print: "“The gross amount of check is smaller than the actual amount billed on the legal paperwork. … As is customary in my little world, these smaller amounts are in my advantage.â€