Asphalt driveways last anywhere from 15 to 30 years, but if you don’t stay on top of repairs, you may find yourself spending extra to replace your driveway before its typical lifespan. Stay on top of repairing cracks and potholes by routinely inspecting your driveway once or twice a year. It’s a good idea to pressure wash your asphalt driveway at least once a year to keep it clean. Apply a sealer every one to five years, based on your climate.

If your driveway is cracked, you can repave it with a process called asphalt overlay. Overlay is more cost-effective than a full replacement but is better suited for minor cracks and issues. If you have major cracks or other problems like water pooling, asphalt overlay isn’t your best bet. Plus, paving over a cracked driveway only extends the lifetime by about 10 years, whereas replacing it would start the clock over completely to give you up to 30 years.

Instead of a set number of types, asphalt comes in variations designed for different needs. Some are categorized by temperature—hot mix, warm mix, and cold mix. Others are sorted by composition, like dense-graded, gap-graded (such as Stone Matrix Asphalt), porous, and mastic asphalt. There are also modified versions with added compounds like polymers, rubber, or emulsions. Instead of focusing on a number, it may be more useful to understand how contractors customize asphalt for durability, climate, and traffic conditions.

In most cases, you don’t need a permit to repave your driveway, although some exceptions exist. If you’re widening your driveway and plan on widening the apron as well, you’ll usually need a permit from the Department of Transportation in your area. This permit costs between $50 and $300 in most cases. Most municipalities will also require a certified and insured contractor do the work relating to the apron and curb cut. You can contact your building department or ask your paving company if you need a permit. Your driveway professional will usually pull the permit for you.