How much space do you need around a trampoline?

The short answer

Leave 6.5 feet (2 m) clear on every side of the frame and 24 feet clear overhead, measured from the ground. For a 12 ft round trampoline that is a clear square about 25 feet across, with nothing hard in it and nothing above it lower than 24 feet.

The overhead figure is the one US manuals agree on. Every one of the nine manuals compared here that is sold in the US gives 24 ft from the ground^123456789. The side figure is the one people argue about, and the reason is simple: six of those nine manuals print no side distance at all. They say "lateral clearance is essential" and "maintain a clear space on all sides of the trampoline"³, and stop there.

So the numbers in circulation come from somewhere else. Springfree's US blog suggests 3 to 5 ft and says plainly that there is "no standard minimum clearance"¹⁵. Manuals and consumer agencies outside the US settle on 2 m. Use 2 m. It is the figure every non-US source here agrees on, it is more than the 5 ft and 6 ft two US manuals print and less than Jumpking's 8.2 ft, and 3 ft is below every manual figure found.

Twelve manuals, side by side

Here is what each manual actually prints, with the brand where the manual names one:

Three things stand out.

• The US wording is shared. The Skywalker, JumpSport, SkyBound and Lowe's manuals use near-identical sentences about overhead and lateral clearance. That shared text has an overhead figure and no side distance. Springfree's guide attributes the 24 ft to ASTM F2225¹⁵, the enclosure standard; that standard is sold, not published, and was not read here.
• The same company prints different numbers by market. Springfree asks for 5 ft at the sides, "in EU countries, 6.5 ft (2.0 m)", and 16.5 ft above the mat except "in USA and Canada, 24 ft (7.3 m) above the trampoline from ground level"⁹. The trampoline is the same. The number follows the market's convention.
• Jumpking is the outlier on the high side. Its 14 ft manual asks for 2,500 mm, 8.2 ft, on all sides⁴, the most of any manual found.

Why the sides matter more than people think

The space beside the trampoline is where a child lands when they come off it. In Queensland injury surveillance data from 1999 to 2017 (10,726 trampoline injury episodes), falls made up 77.48% of domestic trampoline injuries¹⁶. A "fall from" in that study means a fall from the trampoline onto the surrounding ground, including a child propelled off it. Around 45% of falls from trampolines resulted in fractures, against 35% of falls on them, and children aged 4 to 5 appeared more likely to have "fall from" injuries than older children¹⁶.

Enclosure nets changed the pattern. Falls from trampolines decreased substantially after 2007, which coincided with round trampolines, many with nets, replacing older rectangular designs in Australia¹⁶. But the side clearance in the manuals is printed for trampolines that come with a net: Springfree's 5 ft is in the instructions for its trampoline and enclosure⁹. A net reduces how often a child goes over the edge. It does not make a fence post 2 feet from the frame acceptable, and a net that is torn, unzipped or taken down for a storm is no net at all.

This is the same idea as the use zone around playground equipment: a clear area where a fall lands on something forgiving. The trampoline standards are separate from the playground ones, but the reasoning carries over.

The footprint by trampoline size

Add 13 feet to the frame size (6.5 ft on each side) to get the clear square you need. For an oval or rectangular frame, add 13 feet to each dimension.

If your yard cannot give the 6.5 ft column, go down a size before you shave the clearance. A 10 ft trampoline with its full clear area is a better installation than a 14 ft one against the fence. Small yards covers whether a trampoline is the right use of a tight space at all, and choosing a playset gives the equivalent footprint for swing sets if both have to fit.

What counts as an obstacle

The manuals list the same things, and the non-US ones are the most specific:

• Hard ground. Jumpking says the free space should not include "concrete, bitumen, brick, or other hard surfaces"⁴, and Springfree uses the same list⁹. A patio edge or a paved path inside the ring fails.
• Other play equipment and pools. Springfree names "pools, swings, slides, and climbing frames" as conflicting installations⁹. Keep the trampoline's clear ring and a swing set's use zone apart, not overlapping. Pools and play areas covers why a trampoline near a pool fence is its own problem: it is a climbing aid.
• Fences, walls, trees. BERG names "trees, fences or any other obstacle"¹¹; the US manuals say walls, structures, fences and other play areas¹³.
• Anything underneath. JumpSport says to remove any obstructions from beneath the trampoline³, and Springfree's checklist names bikes, lawn mowers, garden tools and toys⁹. A jumper's feet push the mat down toward whatever is stored there.

Grass is what most manuals expect inside the ring. BERG's says a soft, flat surface "such as grass or sand"¹¹. Backyard surfacing covers what holds up under heavy use, and what not to use covers the materials that look soft and are not.

Overhead: 24 feet, and what it rules out

In practice the overhead figure rules out three common spots:

1. Under a tree. The manuals ask for clearance from "tree limbs"³. Shade is a reason people put trampolines under trees, and one branch within 24 ft over any part of the clear square breaks the rule.
2. Under a service line. The SWTC1500 manual warns specifically against placing a trampoline too close to overhead electrical wires¹. Look for the line from the pole to the house before you pick the spot.
3. Against the house. Eaves and gutters on a single-storey house are well inside 24 ft, so the side clearance and the overhead clearance both push the trampoline out into the yard.

Outside the US the figure is lower. Springfree's 16.5 ft above the mat works out to roughly 20 ft from the ground on its 3 to 3.3 ft high models⁹¹⁰, BERG asks for 7 m (about 23 ft)¹¹, and CHOICE says five metres overhead¹⁴. None of them is a reason to accept less than your own manual says, and in the US your manual says 24 ft.

Level ground and slopes

Springfree's guide asks that the rise across the whole space be no more than three degrees¹⁵, which is about 5 inches over 8 feet. BERG wants a flat surface¹¹. A frame on a slope loads its legs unevenly and walks downhill over a season. Site prep and leveling covers how to get a pad flat, and surfacing on slopes covers what happens to loose material when it is not.

A spot that is level, clear for 6.5 ft and open to the sky is also usually an exposed one. Exposed spots catch the wind, so the same site needs anchoring before the first storm, not after.

Where this stops applying

Every figure on this page is a manufacturer's or a consumer agency's, not a law. No US standard read for this page sets a side distance, and the ASTM standards behind the 24 ft wording are paid documents that were not read. Your own manual governs your warranty; if it asks for more than 6.5 ft, use its number.

Norway's product safety agency says a trampoline's warning label should tell you how much free space it requires¹⁷. If yours does, that is the number to start from.

In-ground trampolines remove the drop from frame height, but a child can still be thrown clear of the mat, and the manuals' obstacles apply to the ground around the pit just the same. Local rules are separate again: a setback from the lot line or an HOA ban has nothing to do with these clearances, and permits and HOA rules covers them.

Space is one safety layer. Most injuries happen on the mat. Backyard trampolines covers the rules that matter most, one jumper at a time and no somersaults, and supervision covers what watching actually involves.

What to do next

Before you buy, stake out the clear square from the table, 13 feet wider than the trampoline, and look up. If a branch, a wire or an eave is inside 24 feet anywhere over that square, move the square or buy a smaller trampoline. Once it is in, walk the ring each spring: things migrate toward a trampoline over a year, from the bike parked underneath to the new raised bed against the fence. Pair that walk with the net and pad check in annual maintenance.