What to Do About Sinking or Uneven Driveway Areas

You should first treat an uneven driveway as a safety and drainage problem, then choose a repair that matches what’s happening under the slab. In coastal North Carolina, that usually means you stop the water that’s undermining the base before you spend money on patching, lifting, or replacement.

When a section drops near the garage, cracks at a seam, or starts ponding after a hard Wilmington rain, it’s easy to reach for a quick surface fix. But concrete rarely “just settles” on its own, and a skim coat or overlay won’t hold if the slab keeps moving. This guide helps you decide whether to monitor it, reduce the trip hazard now, or bring in a pro. It also lays out the right sequence: size the risk, control runoff and washout, then choose between grinding/patching or replacing a panel.

Quick Triage: Is It a Trip Hazard or a Bigger Failure?

You can live with an ugly slab for a while, but you can’t un-trip someone on the way into the garage. The first decision is about immediate safety, not perfect concrete.

If the slab edge has a noticeable “lip,” treat it as a safety issue first. That is non-negotiable, and even This Old House would tell you it is not a cosmetic flaw. Uneven joints catch toes, stroller wheels, and tire sidewalls, and they can turn a minor sink into broken concrete once you keep driving over it.

Take action if there’s about a 1-inch height change or you’re seeing ponding after a hard Wilmington rain (and note that driveway changes shouldn’t create new drainage or erosion issues at the right-of-way—see NCDOT’s Policy on Street and Driveway Access to North Carolina Highways). If it’s a small dip with hairline cracking and no pooling, mark the low spot, take photos, and re-check after the next few storms to see if it’s still moving.

What to do first in coastal NC (stop the water)

In Wilmington-area soils, a sinking panel usually isn’t “just settling,” it’s getting undermined, so keep an eye on it and treat it like a sandcastle at high tide. Heavy rain, sandy subgrade, and roof runoff can cause driveway erosion under the slab fast, so any fix that ignores water routing often fails even if the slab looks great on day one.

Start by finding where water goes during a hard rain and correct the obvious sources: extend downspouts so they discharge well away from the driveway/garage edge, and redirect concentrated runoff so it doesn’t shoot under the slab. If water currently flows toward the street, make sure your changes don’t create new ponding at the apron or dump water in a way that erodes the ditch or right-of-way. After you’ve controlled water, you can evaluate lifting or replacement without resetting the clock.

Roof runoff and clogged gutters are a common hidden source of driveway washout, especially during coastal downpours. Read more in our article: Safely Clean Gutters

Choosing the fix: grind/patch vs lift vs replace

The wrong repair turns into two bills, since the panel often drops again or the crack reopens. A few clues can tell you whether you’re dealing with a surface nuisance or a support problem.

If you’ve stopped the water, pick the sinking driveway repair based on two things: how big the height change is and whether the slab’s still structurally sound. A quick grind (to remove a trip lip) or a patch/skim coat only makes sense when the difference is small, roughly 1 inch or less, and the goal is usability or appearance, not to stop movement. If the panel has dropped but is mostly intact (no rocking and cracks that look “settlement-y” instead of broken-up), lifting can be the best value because it restores grade without tearing out concrete. If the base is failing, surface-only work usually wastes money. If you want a second opinion, evaluate what’s happening underneath, since the void is what drives the movement.

Standing water at the driveway edge is often less about the concrete surface and more about where the grade sends stormwater after heavy rain. Read more in our article: Standing Water Driveway Issue

FAQs

Will Mudjacking Leave Big, Noticeable Holes In My Driveway?

Usually, yes: traditional mudjacking commonly uses drilled access holes around 2–4 inches wide, then patches them after lifting (see a typical description of the process in this mudjacking vs polyurethane overview). The patches can stay visible, so if appearance at the garage apron or main approach matters to you, ask to see photos of finished patch work.

Is Polyurethane Foam Lifting “Permanent”?

Foam lifting can perform very well, but the industry doesn’t have the same multi-decade track record as mudjacking in many markets. Treat “permanent” like marketing language. Do your homework and look for a warranty that is a life jacket, not a paper umbrella, plus proof they are fixing the water and base issues that caused the voids.

What’s A Realistic Ballpark For Replacing Just A Section Of Driveway?

Partial panel replacement often prices out around $8–$15 per square foot, including removal and new concrete (ranges like this are commonly published in concrete driveway repair cost guides).

If you’re weighing replacement, per-square-foot pricing is only half the story—site access and base rebuilding can swing totals a lot. Read more in our article: Driveway Replacement Cost Coastal Nc Your total swings with access, thickness, reinforcement, and how much base has to be rebuilt.

What Should I Ask For In An Estimate So Drainage Doesn’t Get Ignored?

A bid can read well and still leave you with the same washout when the next big storm hits. The goal is to hear a plan for water, not just a price for concrete.

Ask, “Where do you think the water is coming from, and what changes will stop it from washing out the base again?” If a quote for driveway repair Wilmington NC only talks about lifting or new concrete but can’t explain downspouts or runoff paths, you are buying a reset, not a fix. Pull the permit plan with the County building-permit office before you spend real money.