Commercial Parking Lot Grading

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Commercial parking lot grading is a bigger-scale version of residential pad work with tighter drainage and load-bearing requirements — the subgrade has to handle vehicle traffic long-term without rutting or ponding, and drainage has to route stormwater to the site's approved discharge point.

What's included

• Clearing and rough grading the lot area to the design elevations
• Subgrade preparation and compaction sized for the expected vehicle load
• Grading for positive drainage to catch basins, swales, or the site's stormwater management design
• Coordination with the paving contractor on final grade tolerances before asphalt or concrete goes down

Why commercial grading has tighter tolerances than residential

Parking lots need consistent, predictable drainage across a much larger surface than a residential driveway, and local stormwater regulations typically require a defined drainage plan showing where water goes before, during, and after construction. Getting the subgrade compaction and drainage grade wrong shows up later as standing water, pavement failure, or a stormwater compliance issue.

What affects cost and timeline

Lot size, how much cut/fill is needed to reach design grade, soil conditions, and the complexity of the stormwater drainage plan the project requires. Larger commercial lots with more elevation change or drainage structures take longer and cost more than a simple, mostly-flat lot.