A new asphalt driveway in Duncan typically costs $3 to $7 per square foot for a standard two-car driveway of 500 to 700 square feet, totalling roughly $1,500 to $5,000. Concrete driveways cost more at $8 to $18 per square foot. Interlocking paving stone is the premium option at $15 to $40 per square foot installed. Prices vary based on the existing base condition and whether excavation is required.
A properly installed and maintained asphalt driveway in Duncan typically lasts 15 to 25 years. Sealcoating every two to three years significantly extends its life by protecting against UV damage and water infiltration from freeze-thaw cycles. Crack filling as soon as cracks appear prevents water from undermining the base. Concrete driveways last 25 to 50 years with less maintenance required.
Asphalt paving in Duncan is best done between late spring and early fall when temperatures are consistently above 10 degrees Celsius. The asphalt mix and the base must both be above temperature minimums for proper compaction. Paving in cooler temperatures results in a weaker surface. Most paving contractors are fully booked by mid-summer, so booking in early spring is advisable.
A permit is typically not required for repaving an existing driveway footprint. However, widening a driveway, creating a new curb cut, or paving an area that affects municipal drainage may require permits from the city. Some municipalities also regulate the total percentage of a front yard that can be paved. Confirm with your local city planning department before beginning major changes.
Ask about base preparation, which is the most important factor in pavement longevity. The subgrade should be stable and properly graded. Ask about asphalt thickness (2 to 3 inches is standard for residential; 3 to 4 inches for heavier use areas), compaction method, and edge finishing. A written quote specifying base depth, asphalt thickness, and warranty terms protects your investment.
