I want to put a 20X15 concrete patio and have no idea of how much per square foot is fair. This is going to be a plain Jane broom finished rectangle of a patio using standard 3500 psi standard ready-mix. There is no existing concrete there, so no demo and haul out to consider for the contractor. I looked online at those sites you enter your zipcode in and they vary so widely I have no idea, i.e., Homewyse, etc. Best I could come up with is 5-6 dollars a square foot. Thoughts? ETA: $107 per cubic yard is the going price for ready mix in my area.