Quick Verdict
Sport court excavation is the ground prep that gives a pickleball, basketball, or tennis court a flat, stable, well-draining base before the slab or surface goes down. It means clearing the footprint, cutting to a precise and level grade, compacting a rock base, and building in enough slope to shed water. In Oregon, where courts sit through months of rain, drainage and compaction are what keep a pad from heaving, cracking, or holding puddles. This guide walks through pickleball pad prep and court pad grading the right way.
Why the Base Makes or Breaks a Court
A sport court has to stay dead flat and true. A ball has to bounce the same everywhere, and players need a consistent surface. That flatness comes from the excavation and base, not the surface coat on top. If the sub-base settles unevenly, the concrete or asphalt above it cracks and the court develops low spots that puddle.
Good sport court excavation delivers a uniformly compacted base, cut to the right elevation, with a slight consistent slope for drainage -- typically about one percent, enough to move water without affecting play. Everything the surfacing crew does depends on that base being right.
Sizing and Layout
Before the machine starts, the footprint gets staked. A standard pickleball court is 20 by 44 feet of play area, but the excavated pad runs larger to allow for out-of-bounds space, fencing, and edges. A basketball or multi-use court is bigger still. The excavation over-cuts slightly beyond the finished surface so the base and edges are fully supported.
- Pickleball: plan for a pad well beyond the 20 by 44 court lines.
- Basketball half-court: a larger footprint with room for the key and run-off.
- Multi-use or tennis: the largest footprint, often needing more grading and fill balancing.
On sloped Oregon lots, creating a flat pad may require a cut on the uphill side and fill on the downhill side, sometimes with a retaining wall excavation to hold the grade.
Oregon Soil, Grade, and Drainage
What is under the court decides how much base and drainage you need. The master excavation guide covers Oregon soils, but for courts the essentials are:
- Willamette Valley clay drains poorly and swells -- expect a thicker rock base and a drain plan.
- Central and Southern Oregon rock may need ripping to reach grade but drains well once cut.
- Any flat pad needs a consistent slope so winter rain sheets off instead of ponding.
Cutting the pad flat is only half the job. The base has to slope enough to drain, and on wet sites a perimeter drain or French drain carries water away so the pad does not sit in a saturated pocket.
The Sport Court Excavation Sequence
- Call 811 and mark utilities.
- Stake the pad footprint, elevation, and slope.
- Strip topsoil and clear the footprint.
- Cut and fill to a flat, sloped subgrade and compact it.
- Place and compact the crushed rock base in lifts.
- Add perimeter drainage on wet sites.
- Fine grade the base to tolerance and hand off to the surfacing crew.
What Court Pad Grading Costs
Pricing depends on court size, how much cut and fill the lot needs, soil, and drainage.
| Item | Baseline Range |
|---|---|
| Grading / leveling, per sq ft | $0.75 -- $4.00+ per sq ft |
| Excavator + operator, hourly | $150 -- $350+ per hour |
| Crushed gravel, delivered, per cu yd | $45 -- $110+ per cu yd |
| French drain, per linear foot | $15 -- $120+ per linear foot |
| Mobilization fee | $250 -- $800+ flat |
Sloped lots that need heavy cut-and-fill or a retaining wall run toward the top of that range and beyond.
Base Depth and Compaction: What Goes Under the Slab
The rock base is the part of a court you never see and can never fix once the slab is poured. How thick it needs to be comes straight from the soil under it. On free-draining Central or Southern Oregon ground you may get away with a modest section. On Willamette Valley clay, plan for more rock and often a geotextile fabric between the clay and the base so the two do not mix and pump.
| Subgrade | Typical base approach |
|---|---|
| Well-drained sand or gravel | Thinner crushed-rock base, compacted in lifts |
| Firm silty loam | Standard rock section over compacted subgrade |
| Willamette Valley clay | Thicker rock base, geotextile fabric, perimeter drain |
| Soft or wet clay pocket | Overexcavate soft spots, replace with structural rock |
Permits and What to Expect on Job Day
A private backyard court pad often needs little more than a grading or site permit, but that varies by city and county, and anything near a slope, setback, or drainage way can trigger extra review. Whatever the permit picture, the crew calls 811 to mark utilities before the first cut -- a must on any dig. On job day itself, expect the footprint staked, topsoil stripped and hauled or stockpiled, cut-and-fill to reach the flat sloped subgrade, then rock placed and compacted to a fine grade the surfacing crew can build on. On a straightforward flat lot that is often a couple of days; sloped lots with cut-and-fill or a wall take longer.
The Bottom Line
A great court starts underground. Flat, compacted, well-drained base prep is what keeps a pickleball or basketball pad true through Oregon winters. Cojo is a CCB licensed and insured Oregon excavation contractor based in Hood River, working statewide, and we handle court pad grading from stakeout to finish base. See our excavation services or request a free estimate.