In-Ground Trampolines — The Backyard Upgrade Kids Beg For
In-ground trampolines look cleaner, last longer, and are dramatically safer than the rusty above-ground kind. Here's what installing one actually involves.
Why in-ground beats above-ground
Above-ground trampolines blow over in monsoons, fade and rust in UV, and are the #1 cause of yard injuries. In-ground sits flush with your turf — no ladder fall, no wind sail, no eyesore. The trampoline itself is the same; the install is what's different.
What's actually involved in install
- Excavate a bowl 3 ft deep at the perimeter, 4 ft deep at the center — wider than the trampoline frame.
- Build a retaining wall (concrete block or pre-engineered kit) so the soil doesn't collapse inward.
- Engineer ventilation — without airflow under the mat, kids 'thud' instead of bounce.
- Drainage to daylight or to a French drain — Phoenix monsoons can drop 2 inches in an hour.
- Reinstall surrounding turf or pavers flush with the frame.
Cost in Arizona
A quality in-ground install (10–14 ft trampoline + excavation + wall + drainage + turf restoration) runs $4,500–$9,500. The trampoline kit itself is $1,200–$3,000; the rest is dirt work and finish. We use Capital Play and Avyna kits — both designed specifically for sunken install with bonded retaining walls.
Safety net — yes or no?
For kids under 12: yes, always. The trampoline being flush doesn't eliminate the sideways-fall risk. A removable net pole system runs about $400 and pulls out when you want a cleaner look for entertaining.
What kills cheap in-ground installs
DIY pits without retaining walls cave in within a year. No drainage = standing water + mosquitoes + rotted mat. No ventilation = poor bounce + broken springs. Skipping any of these saves $1,500 now and costs $5,000 in two years.
