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1 Types #10, #57 and #411 crushed granite average $0.50 per square foot. 2  The average cost per square foot of the highest-quality crushed granite is $0.76. 3  Types #2 and #1 of crushed granite average $0.76 per square foot as they are of the highest quality of rock.4  This cost estimate is for materials only. The average cost per square foot of the highest-quality crushed granite is $0.76. 2  Types #2 and #1 of crushed granite average $0.76 per square foot as they are of the highest quality of rock.
Danny Davis, owner of Davis Outdoor Maintenance, in Chattanooga, Tennessee, says the cost of crushed stone in his area is $100 to $120 per ton, installed. He says the average sized driveway is about 20-by-20 feet, which requires about 13 tons of crushed rock and costs $1,300 to $1,500, including materials and labor. Schott estimates the average cost for him to install a gravel driveway is $1,200 to $1,500. According to CostHelper, the prices range drastically, from as low as $300 to thousands of dollars. A 12-by-25-foot driveway, with at least 4 inches of gravel, can cost about $300 to $1,000. Professionals recommend having anywhere from 4 to 8 inches of gravel.