If it's too flat, drainage may become an issue, and if it's too steep, the surface becomes slippery and dangerous. As a general rule, a driveway should be less than a 15% grade, which means that it should not rise more than 15 feet over a distance of 100 feet.Oct 5, 2020
How steep can a concrete driveway be?
Lower slopes of 1 percent, or 1 foot rise over 100 feet, may be acceptable, but in locations with heavy precipitation, runoff drains slowly and is more likely to collect. The maximum grade for a driveway is 25 percent, or 25 feet rise over 100 feet. Transition zones are recommended for driveways that steep.
How much should a driveway slope?
Ideally, the driveway should grade away from the garage at a 2 to 5 percent pitch. Two percent calculates to one-quarter inch per foot. In many cases, it is necessary to finish the driveway with a diagonal pitch when it is not possible to slope downward and away from the garage opening.
Can you fix a steep driveway?
Dig out the driveway, pave a flat driveway, and then install a car lift to get your car up to the garage. Hire house movers to move your garage deeper into the property, and then repave the driveway at a more gradual angle.