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While some areas may allow for a slope of up to 20%, this is often the maximum slope for driveways, with a few exceptions of up to 25%. Other regions may have a maximum of 12%, 15%, or 18%, so check with your local building department to ensure you’re laying a driveway that is up to code for your location.

Several materials are suitable for steep driveways. Gravel and crushed stone are affordable options that provide good traction. Permeable pavers—such as plastic, rubber, or concrete—filled with gravel or crushed stones are also excellent, as they allow water to drain without causing erosion and perform well in ice and snow. Another option is resin, which can be coated with an anti-slip finish and helps prevent puddles. For added stability, you can install a retaining wall to prevent pavers and gravel from shifting over time.

Asphalt, which is stone mixed with tar, is the most common material for outdoor basketball courts because it’s so sturdy and versatile. However, you don't have to use it: another option is polymeric rubber, which has shock pads that can prevent injury. This option is a little more expensive, ranging between $16 and $25 per square foot.

Materials used for indoor basketball courts, such as hardwoods, aren’t really an option outdoors.

Driveway aprons typically range between four and seven inches thick, though your town's building codes will likely have specific requirements. Additionally, you may need to add a layer of permeable aggregate in the excavation below your paved apron to ensure proper stormwater drainage.