In this article
On money alone, no. An in-ground trampoline costs several times what an equivalent above-ground one does by the time the hole is dug, the retaining wall is in and the dirt is hauled away, and it buys you a trampoline that is only slightly safer and cannot be moved. It is worth it for one reason: you want the trampoline to disappear into the yard. If that matters enough to you to pay for it, it is a good buy. If you are hoping for a big safety upgrade or a better bounce, spend the money on a good above-ground model with a mat-mounted net instead.
What you are actually paying for
In-ground trampolines cost more than above-ground ones before a shovel touches the ground, and the reasons are real rather than a brand premium.
The frame and springs are usually double-coated galvanized steel, because the inside of a trampoline pit stays damp in a way an open yard does not. The mat and spring pads are built to vent, since air has to escape from a hole every time somebody lands. And most models include retaining walls, often as part of the frame itself, which is a structural component that an above-ground trampoline simply does not have.
Then there is the installation, which is where the budget usually goes off the rails: locating buried utilities, digging, dealing with the soil you dug out, and drainage if your ground does not take water.
The case for an in-ground trampoline
It does not dominate the yard
This is the reason people buy them, and it is a legitimate one. All you see is the mat and the pad ring. No galvanized legs, no three-foot wall of net, no shadow across the lawn. People landscape right up to the edge with shrubs or borders. If you have put work into your yard and cannot find anywhere to put a trampoline that does not look wrong, this solves it.
It also ends the dead-circle problem, since a trampoline sitting on grass will usually kill it. There is no grass under an in-ground trampoline to worry about.
Little kids can get on and off by themselves
No ladder. A three-year-old steps or crawls on. This sounds minor and is not: falls while climbing on and off, especially while somebody else is bouncing, are a genuine category of trampoline injury.
It cannot blow away
A strong gust can lift an above-ground trampoline and put it through a fence or into power lines. An in-ground trampoline sits in a hole with almost no profile for wind to catch. If you live somewhere with real windstorms, this is worth more than it sounds and saves you anchoring and re-anchoring every season.
Slightly safer, and easier to cover
The fall from the mat to the ground is inches instead of feet, which is why people run these without an enclosure net. It is also quick to throw a cover over a trampoline with no net on it, and covering it between uses is the single best thing you can do for its lifespan.
The case against
Cost
The trampoline itself is more expensive, and then the hole is a separate project. Contractors charge anywhere from a few hundred dollars for digging alone up to a few thousand for digging and installing, depending on your soil and your access. Get local quotes before you fall in love with the idea, because the range is wide and it is driven by things specific to your yard.
Installation is a real project
Before anything else, you have to confirm there are no buried utilities where you plan to dig. Most municipalities will come out and mark them for free. After that, the soil decides your life: some yards come out with a shovel and a weekend, and some need a backhoe and an operator. And you have to decide in advance where all the excavated dirt is going, because it is a surprising amount once it is out of the hole.
Drainage
You are digging a bowl in your yard. If your soil drains well, you may get away with nothing. If it is clay-based, water will sit in the bottom, and standing water under a trampoline breeds insects and attracts animals. A sump pump in the base of the pit is the usual fix, and it needs to be planned in before the trampoline goes on top of it.
Maintenance gets awkward
Checking springs, tightening hardware and confirming the frame is still level all get harder when the frame is at ankle height in a pit. Nothing about that is difficult, it is just less convenient, which in practice means it happens less often. And if a phone or a shoe goes under the mat, you may be pulling springs to get it back.
Critters
A shaded, cool pit is attractive to things you would rather not have near the kids. This is a manageable problem if you keep the pit dry and the surrounding yard tidy, but in some regions it is worth reading up on keeping snakes out of a trampoline pit before you dig.
You are committed
An above-ground trampoline can be moved across the yard in an afternoon with a few helpers. Moving an in-ground one means digging a second hole and filling in the first. Choose the spot as though it is permanent, because it is.
Are in-ground trampolines actually safer?
A bit safer, not fundamentally safe. The shorter fall is real, and it is the main safety argument. Here is what qualifies it.
The gap. Some in-ground trampolines are designed to sit slightly proud of the ground, six to twelve inches, so air can escape. That gap is vertical, so falling into it is very unlikely, but a kid running at the trampoline can catch a foot or a hand in it. Models designed to sit flush do not have this problem, and models with a gap usually ship with a skirt to cover it.
The net. An in-ground trampoline needs an enclosure less than an above-ground one does. It does not need one zero. Kids still launch themselves sideways off a mat, and the ground is right there. If safety is the priority rather than the look, an in-ground trampoline with a net is the safest configuration available.
The install. A badly installed one is worse than an above-ground trampoline, not better. Pit walls that collapse inward, a frame that has settled out of level, dirt slowly filling the hole so a hard bounce reaches the bottom. All of these come from cutting corners on the retaining wall and on getting the frame level.
What is around it. If you skip the net, the ring of ground around the trampoline is your landing zone. Grass, pea gravel or padding, and nothing hard within launching distance.
Can you just bury a regular trampoline?
You can, and if you already own an above-ground trampoline it is often the cheaper path. It is more work than installing a purpose-built in-ground model, and the result is not as good. Four things change.
You dig deeper. Above-ground trampolines have taller legs, so the hole has to be deeper than one for an in-ground model, which is more excavation and more dirt to remove.
You build the retaining wall yourself. In-ground trampolines come with theirs, sometimes as part of the frame. With a regular trampoline you are cutting lumber, sheet metal or flexible landscape edging to hold the pit walls back.
Airflow becomes your problem. A regular mat and pad are not vented. Set the frame flush and the trapped air kills the bounce; set it eight to twelve inches proud and you get airflow plus the gap issue described above. You also get a slapping noise on every jump as air lifts the spring pad, which gets old faster than you would think.
It will rust sooner. A standard frame and standard springs were not specified for permanent damp. They will last, but not as long as the double-coated hardware on a trampoline built for a pit.
How the installation goes
1. Get the area cleared
Call your utility locating service before you dig. It is usually free and it exists precisely so people do not put a shovel through a gas line or a cable run. Check for your own sprinkler lines too, since those are not on anyone’s map and will need rerouting.
2. Work out your soil
Whether you need a drainage system is decided by your soil, not by your preference. Sandy and loamy ground usually drains on its own. Clay does not, and a clay yard means planning a sump pump or another drainage route now rather than discovering the problem in the first heavy rain.
3. Dig
This is the hard part, so have a plan before you start. Hiring a landscaper who has dug a trampoline hole before is money well spent, and many will haul the dirt away as part of the job.
If you dig it yourself, make the hole slightly wider than the trampoline, roughly a foot more diameter than the frame, so you have room to work. The profile should be deepest in the middle and slope up to a flat ridge around the rim, which is where the legs sit. Measure for whatever clearance your setup needs before you start moving dirt.
4. Build the retaining wall and put in the drain
Something has to hold the pit walls back or the hole slowly fills itself in. You can attach the wall to the frame or build it as a separate ring around the pit; the separate version is more work up front and much easier to live with, because you can lift the trampoline out for maintenance without dismantling the wall. Lumber cut to size with sheet metal or flexible landscape edging does the job.
If you need a sump pump, it goes in the bottom of the hole now, before the trampoline goes over it.
5. Set the trampoline
Frame in first. Check it is level, then check it again, because this is the thing that is genuinely hard to fix later. Then springs and mat. Backfill any gaps behind the retaining wall with soil, firm it down, and you are finished.
So is it worth it?
It is worth it if the look of the yard is the thing driving the decision, you are confident about where it goes and you have budget for the hole as well as the trampoline. It is worth it if you live somewhere windy enough that an above-ground trampoline is a liability.
It is not worth it if you are buying it for safety, since a good above-ground trampoline with a mat-mounted net gets you most of the way there for a fraction of the cost. It is not worth it if you might move house in a few years, or if you are not sure yet whether the kids will actually use it.
If you have decided to go ahead, the model this site has pointed people to is the American-made system from In-Ground Trampoline Systems, which uses 18-gauge steel wall panels and 14-gauge tubing that act as frame and retaining wall together, a vented mat, pre-galvanized springs and a shallower hole than most. I have not used it myself. It is here because the spec addresses the three things that actually go wrong with in-ground installs: the walls, the moisture and the airflow.
