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1 A stamped asphalt pattern (typically in the shape of bricks or stones) on a new or existing asphalt driveway can cost $3 -$9 a square foot, or $900 -$2,700 for 12'x25' or $3,600 -$11,000 for 24'x50' for just the stamping. A gravel driveway starts at roughly $0.75 -$3 or more a square foot, or $300 -$1,000 for a 12'x25' single-car driveway. 2  Costs can double for a roadway-quality driveway. 3  Loose gravel will need replenishing periodically, but a correctly designed, installed and maintained gravel driveway can last 50-100 years or more.
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. A driveway more than 12-feet wide and a quarter-mile long with slopes, curves and poor soil â which requires additional prep work â can cost $11,000 all the way to $60,000.