Construction guide · Updated 2026
Tennis court construction
is a drainage project first
Tennis court construction means grading a 120 by 60 foot area, placing a compacted stone base, building a slab (post-tension concrete, reinforced concrete or asphalt) at a 1 percent slope, and finishing it with an acrylic hard-court system, clay, or synthetic turf. A single outdoor hard court takes 6 to 10 weeks and costs $50,000 to $120,000.
The surface is the choice everyone talks about. The base and the drainage under it are what the court will be judged on in ten years.
Key figures
- Court
- 78 × 36 ft inside a 120 × 60 ft recommended area
- Base
- 4–6 in compacted crushed stone over graded subgrade
- Post-tension slab
- 4–5 in, cables tensioned after pour, no joints in the court
- Asphalt
- 2 lifts totaling 3–4 in, cure 14–30 days before coating
- Slope
- 1% in one plane, never toward the net
- Fence
- 10 ft chain-link, 12 ft at ends for commercial
- Build time
- 6–10 weeks for one hard court
- Cost
- $50,000–120,000 per outdoor hard court, excluding land
Free to cite with attribution and a link. Full set at courtbaseline.com/reference.
Fig. 01
What is the best tennis court base?
Post-tension concrete, for any court the owner expects to keep for 25 years. A 4 to 5 inch slab with steel cables tensioned after the pour resists the cracking that control joints and reinforcing bars only manage. Asphalt is the economical choice where the climate is mild and the owner accepts resurfacing every 4 to 8 years.
| Base | Thickness | Slab cost | Resurface interval | Best for |
|---|---|---|---|---|
| Post tension concrete tennis court | 4–5 in | $30,000–45,000 | 6–10 years | Clay soils, freeze-thaw, clubs, anyone keeping the court 20+ years |
| Reinforced concrete | 4–5 in | $22,000–35,000 | 5–8 years | Stable soils; control joints will reflect through |
| Asphalt tennis court | 3–4 in, 2 lifts | $15,000–28,000 | 4–7 years | Mild climates, parks, schools, tight budgets |
| Stone base for clay or turf | 4–8 in | $12,000–25,000 | n/a | Har-Tru, red clay, synthetic turf systems |
Sequence
How does tennis court installation work, step by step?
Nine steps over 6 to 10 weeks. The slab cure sits in the middle and cannot be rushed; every other step bends around it.
| # | Step | What happens | Duration |
|---|---|---|---|
| 1 | Survey and design | Soil report, drainage plan, north-south orientation, permit set | 1–3 weeks (before mobilizing) |
| 2 | Excavation and grading | Strip, cut and fill the 120 × 60 ft area to 1% slope, compact subgrade | 3–6 days |
| 3 | Tennis court drainage | Perimeter French drain or trench drain at the low side, outlet to daylight or storm | 1–3 days |
| 4 | Base | 4–6 in crushed stone in lifts, laser-graded, proof-rolled | 2–3 days |
| 5 | Slab | Post-tension pour and tensioning at 7 days; or two asphalt lifts | 2–4 days |
| 6 | Cure | Concrete 28 days; asphalt 14–30 days | 2–4 weeks |
| 7 | Fence, lights, net posts | Footings during cure; fabric, fixtures and post sleeves after | 3–6 days |
| 8 | Surface | Acrylic resurfacer, optional cushion layers, 2 color coats | 4–7 days |
| 9 | Lines and net | 2 in lines (4 in baselines allowed), net hung at 3 ft 6 in posts, 3 ft center | 1 day |
Why is tennis court drainage the step that decides everything?
Because water under a slab is what cracks it. A 1 percent slope sheds surface water; a stone base and a perimeter drain keep groundwater from heaving the slab in winter or softening the subgrade in spring. Hard court construction that skips the drain saves a few thousand dollars and spends it back on crack repair within five years.
The slope runs in one plane, side to side or end to end, never from the net outward and never from the center of the court. Across 120 feet, 1 percent is 14 inches of fall, which is why a court site needs to be flat to begin with or the cut and fill becomes a large number on the quote.
On clay soils, the base layer is also where expansion is managed. Builders in Texas and much of the Southeast will not warranty anything but post tension concrete on expansive soil, and the stone base under it is thicker than the 4 inches a sandy site needs.
What does an indoor tennis facility involve?
A building with 35 to 40 feet of clear height at the net and about 120 by 60 feet of clear floor per court, plus the same slab and surface as outdoors minus the slope. An indoor tennis facility is a pre-engineered steel building or an air-supported dome over a conventional court.
Indoor tennis court construction adds lighting designed to 75 to 125 foot-candles with no fixtures in the sightline above the baseline, HVAC sized for a high-volume space, and a flat slab with internal drainage at the perimeter. Courts can be laid at the minimum 110 by 56 foot spacing indoors because wind and sun are not factors, but 120 by 60 remains the comfortable standard.
The building dominates the budget. A two-court pre-engineered steel structure with insulation and HVAC starts around $1.2 million before the courts; an air dome over two existing courts is a fraction of that but is seasonal and has a 15 to 20 year fabric life.
How is a backyard tennis court built differently?
It usually is not, which is the problem. A residential tennis court needs the same 120 by 60 foot area, the same base and the same drainage as a club court. What changes is access, setbacks and whether the lot can lose 7,200 square feet to an impervious surface.
A backyard tennis court on a sloped lot is often a retaining-wall project before it is a court project, and that can double the price. Most municipalities count the court toward impervious coverage limits and require setbacks of 10 to 25 feet, which rules out many half-acre lots. Lights usually need a separate permit and a photometric plan showing spill at the property line.
Owners who do not have the space are increasingly building a 60 by 120 foot multi-sport slab with tennis lines and pickleball lines, or a smaller court for a different sport entirely. See backyard sport court for what fits on what lot.
FAQ
Tennis court construction, answered
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Can a tennis court be built on a slope?
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Cost, dimensions and resurfacing
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