National Association of Home Builders National Association of Home Builders National Association of Home Builders (NAHB) $289k data from the National Association of Home Builders https://www.nahbclassic.org/generic.a... 18 percent 2015 national average cost National Association of Homebuilders National Association of Home Builders Taylor National Association of Homebuilders https://www.nahbclassic.org/generic.a... residential construction estimate National Association of Home Builders National Association of Home Builders National Association of Home Builders National Association of Homebuilders