Start with the base, not the surface
Asphalt is a flexible layer sitting on compacted base. When the base stays dry and supported, surface treatments like crack sealing and sealcoating extend the life of the lot for years. When water gets into the base and freeze-thaw cycles go to work, the surface fails from below — usually as alligator (fatigue) cracking, rutting, soft spots and potholes that come back in the same place.
That is why the first question in any parking lot repair is whether the failure is local or widespread. A few potholes in a lot that is otherwise tight and well drained are a patching job. Alligatoring across drive lanes and standing water after every storm point toward resurfacing or replacement, and spending on sealcoat over that condition only hides the problem for a season.
Asphalt repair: crack sealing and patching
Crack sealing keeps water out of the base. It is the lowest-cost repair on a per-area basis and the one that most often decides whether a lot reaches its expected life. Patching and pothole repair remove failed asphalt and replace it; the durable version cuts out the damaged area, addresses soft base underneath and compacts new asphalt, rather than throwing loose material into a hole.
Both work best as part of a plan: seal the cracks, repair the failed spots, then protect the whole surface. If you are seeing the same potholes return every spring, ask whether the base under them is being repaired or just filled.
Parking lot resurfacing and asphalt overlay cost
Resurfacing usually means milling off the worn top layer and placing a new asphalt overlay. It resets the surface without the cost of rebuilding the base, which makes it the middle option between repair and replacement. It only makes sense when the base is still sound; an overlay placed on failing base tends to reflect the old cracks back through the new surface.
Asphalt overlay cost is driven mainly by overlay thickness, how much milling is needed to keep curb reveal and drainage working, how many tie-ins there are at entrances and buildings, and how the work is phased around open business hours. Every number depends on scope, thickness, access and season, so we price from a site review rather than a formula.
Parking lot paving cost per square foot: why the range is wide
People search for a cost per square foot because it feels comparable between bids. In practice, square footage is only one input. Small lots carry a higher per-foot cost because mobilization and equipment are spread over less area. Thicker sections for truck traffic, extra base work, drainage corrections, tight access, night or weekend phasing and late-season scheduling all move the number.
As a relative guide: crack sealing is the lowest cost per area, followed by sealcoating, then patching (which varies most with depth), then mill-and-overlay, with full replacement highest. Comparing bids on the same scope — same thickness, same base repair, same drainage work — matters more than comparing the per-foot figure.
How to choose
Use the condition, not the calendar, to decide. A practical sequence for most owners and managers:
- Sound surface, some cracks: crack seal, then sealcoat and restripe.
- Sound lot with isolated potholes: cut-out patching, crack sealing, then protect.
- Widespread surface wear, sound base: mill-and-overlay resurfacing.
- Base failure or chronic drainage damage: full replacement with drainage corrections.
- Mixed condition: phase it — repair the worst areas now and plan resurfacing for a later budget cycle.
