1 Most pools begin with the liner, and they can be made from vinyl or fiberglass. 2  The vinyl is the least expensive with a standard cost of roughly $18,000. 3  The fiberglass bump up the costs to $20,000 without installation. 4  There are also concrete and gunite pools that require around $20,000 to $50,000 to install.ccording to P.K. Data the average cost of a 19' diameter above ground swimming pool is $6,243; while the average cost of a 32'x16' inground swimming pool is $21,919.