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Parking Lot Reconstruction Cost Calculator
Parking lots fail eventually. This calculator sizes reconstruction.
Mill-and-overlay total
$317,000
Full reconstruction total
$674,500
Ancillary cost
$24,500
How the math works
Mill-overlay total = SF × cost + ancillary. Full = SF × full + ancillary.
65,000 SF lot: mill-and-overlay $317k (incl striping/drainage). Full reconstruction $675k. Do mill-overlay unless base failed. Base failure indicators (alligator cracking, rutting): reconstruction only.
How to Use
- Enter parking lot SF.
- Enter mill-and-overlay cost/SF.
- Enter full reconstruction cost/SF.
- Enter striping + signage cost.
- Enter drainage repair cost.
- Read reconstruction decision.
Frequently Asked Questions
Timing?
Asphalt seal coat: every 3-5 years ($0.15-0.30/SF). Mill-and-overlay: year 15-20 ($3-5/SF). Full reconstruction: year 25-35 ($7-12/SF). Concrete parking: longer life (40+ years) but higher up-front cost.
Signs of need?
Alligator cracking (failed base). Potholes requiring repeat repair. Standing water (drainage failure). Rutting (base failure). Aggregate loose (oxidation, late-stage). When multiple conditions present, mill-and-overlay insufficient; full reconstruction warranted.
Layered approach?
Patch and seal coat: 2-5 year extension, cheap. Mill top layer (1-2") and overlay: 10-15 year extension. Full reconstruction: reset lifecycle. Match response to condition. Bad to reconstruct early; bad to delay past structural failure.
Who owns this risk — sponsor or lender?
Construction risks are typically shared: hard-cost overrun owned by sponsor (via completion guaranty), soft-cost and delay risks shared per contract, force-majeure excused but bears owner carry cost. Document risk ownership in the loan agreement and GC contract before closing. Disputes get expensive when roles are unclear. Institutional deals spell out every allocation in writing.
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