Here's something a lot of contractors won't tell you: plenty of "bad-looking" driveways don't need replacement. And some driveways that look repairable are throwing good money after bad. This is the framework we use on real estimates in St. Charles County — so you can gut-check any bid you get.
When repair is the smart money
Hairline and narrow cracks (under ¼ inch), slab still flat. These are cosmetic-to-minor. Cleaning and professional crack sealing stops water from getting in and freezing, which is what turns small cracks into big ones.
A sunken section, otherwise sound. If a slab panel has settled but isn't shattered, mudjacking or foam leveling lifts it back to grade for a third to half the cost of replacement — usually in a single morning.
Surface scaling or spalling, structure intact. If winters and salt have flaked the surface but the slab underneath is solid, resurfacing bonds a new wear layer over the old slab. You can even upgrade the look with a decorative overlay while you're at it.
When replacement is the honest answer
- Wide, multiplying cracks (over ½ inch) or panels cracked into several pieces — the slab has structurally failed and patches won't hold
- Heaving — sections pushed up by roots or frost can't be leveled down; the cause is under the slab
- Failed base — if slabs re-sink after leveling, the ground beneath is the problem, and only excavation and a compacted base fix it
- Widespread deep deterioration — when more than about a third of the surface needs work, replacement usually costs less per year of remaining life than serial repairs
- Age 30+ — repairs on a driveway at the end of its design life buy less time than they would on a 10-year-old slab
The math that makes the decision
Compare cost per year of life gained, not sticker price. A $1,200 leveling job that buys a sound 12-year-old driveway another 15 years is $80/year — fantastic. A $2,500 patch-and-fill campaign on a crumbling 35-year-old driveway that buys 3 years is $833/year — and you still pay for replacement at the end. Cheap repairs on a failed slab are the most expensive option on the menu.
Get an honest read
We do both repair and replacement, so we have no incentive to push you toward either. We'll look at your driveway, tell you which category it's really in, and price both paths if it's a close call. Request your free assessment.