average price for roof cleaning
1 For an average-sized roof of 1,500 square feet (15 squares), that s a total cost of approximately $250 to $500. 2  On a 2,500 square foot roof, expect to pay $375 to $750.oof Cleaning Average Costs. The actual cost of roof cleaning depends on your location, the complexity of the job (i.e. roof size and pitch and the height of your home), and other factors. The following prices are only general estimates.