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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.

Costs range from $3 to $7 per square foot, depending on the area size and project scope.

While blacktop is a type of asphalt, the terms should not be used interchangeably, as not all asphalt qualifies as blacktop. The primary differences are in their composition, production process, and ideal applications. Blacktop contains more stone than other types of asphalt and is heated to a higher temperature during production—300°F or more—while hot-mix asphalt is heated to between 275°F and 300°F. The ratio of bitumen (a tar-like crude oil) is a key differentiator, though sources vary: some state blacktop has less bitumen, making it less durable, while others claim it has a higher ratio. Due to these differences, asphalt is generally more durable and better for high-traffic areas like highways and streets, while blacktop is more suitable for playgrounds and residential driveways. For a driveway project, it is best to consult a professional to determine the most appropriate material.

It is possible to DIY complete hardscaping projects, but in most cases, hiring a professional is best to get the job done correctly. Hardscaping—including installing patios, decks, retaining walls, walkways, and water features—is challenging and time-consuming, so the money you spend on a professional is typically worth it. Not only will the quality be better, but you could avoid problems that come along with a lack of hardscaping experience, like drainage issues that can lead to costly foundation damage and leaks in your home.