Most YMCAs already have the space to build an indoor soccer field. A standard gym, an outdoor field, even a multi-purpose room can each hold one or more 5-a-side fields. WSB Sport builds these as fixed fields with a concrete perimeter, our preferred option, or as free-standing systems that need no concrete foundation at all for branches that can’t take on construction. Either way, you’re converting space you already own into something that earns its keep more hours of the week.
I tell community operators this all the time. The question usually isn’t where to put it. It’s whether what they already have will actually work. Almost always, it does. Here’s how to know, and what the build involves.
Does your space qualify?
Run your building against this before anything else.
| Space type | What it needs | Typical fit |
| Gymnasium | Ceiling 13 ft min (16 to 20 ideal), level sport floor, ~ 4,300 to 6,500 sq ft clear per field | 1 field, sometimes 2 smaller |
| Outdoor field | Level, sound surface, drainage, vehicle access and parking | 2 to 6 small-sided fields |
| Multi-purpose room | Ceiling clearance, clear floor span, room to return to other uses | 1 small or portable field |
Two numbers carry the decision: ceiling height and clear floor area. For indoor play you want at least 13 feet, and 16 to 20 is better because it opens up the extended-wall, continuous-play style and gives the ball a cleaner flight. A full 5-a-side field wants roughly 4,300 to 6,500 square feet, depending on format and walls. Tighter than that, and a smaller format fits. If your gym already hosts basketball, it clears both bars without a second thought.
Converting a gym
This is the most common Y case, and the simplest. A fixed field with a concrete perimeter is the most durable option if your branch can take on that work. If not, free-standing wall panels sit directly on your existing sport floor: no drilling, no anchors in the slab. It’s built as a long-term conversion rather than something you’d take up and down often, though it can be removed later if the branch ever needs the room back for its original use.
The safety spec is built for a building full of kids. Zero screws or bolts inside the playing surface. Elastic cable around the goals to soften ball impact. Not extras. The reason a serious Y picks a real system over a cheaper one.
Converting an outdoor field
An outdoor field sitting mostly empty is some of the best raw material there is. Our outdoor system is 100% hot-dip galvanized steel, built to hold up in extreme climates, from sub-zero winters to desert heat. A fixed, concrete-perimeter build is available for branches that want the most permanent outdoor option; a free-standing design works just as well with no foundation required. Either way, you take one underused field and turn it into several bookable small-sided pitches that can run a league on one and academy training on another.
Multi-purpose rooms and tighter spaces
Not every space is a full gym or a field. For rooms that pull double duty, we use portable setups, generally sized for 3v3 play: fiberglass panels and interlocking turf tiles that go down and come up fast. Soccer on Saturday morning, back to its normal use by the afternoon.
How to build it, step by step
Here’s the whole path, start to open.
- Feasibility and site check. We confirm the space qualifies and model the programming and the numbers. This is where anything that needs solving gets caught early.
- Design and field spec. Layout, number of fields, and whether the build is fixed, free-standing, or portable.
- Light site prep. Usually minimal. Clear the space, confirm the floor is level and sound, sort lighting if it’s needed. No concrete pour on most jobs.
- Installation. The free-standing system assembles on site fast, measured in days for a single-space conversion rather than the days a poured field takes.
- Programming and soft launch. Line up your first leagues or academy blocks and open the doors.
The reversibility most people miss
Here’s the point that turns a nervous board into a yes. Because a free-standing system has no foundation, it can be removed later if the branch’s needs change, say restoring a gym floor for its original use. It’s not something designed for routine teardown, but knowing a full reversal is possible someday is often enough to lower the risk of the decision today. Nothing structural in your building changes during the install or across the life of the field.
Frequently asked questions
How do you build an indoor soccer field in an existing building?
You don’t need to build from the ground up. WSB Sport offers fixed fields with a concrete perimeter as the preferred build, and free-standing systems that install onto an existing gym or field floor with no concrete foundation and no drilling for those who can’t take on construction. The steps are a feasibility check, design and field spec, light site prep, installation, and programming. A free-standing, single-space conversion typically installs in days.
How big is an indoor soccer field?
A standard indoor 5-a-side field runs roughly 4,300 to 6,500 square feet, depending on format and walls. Smaller formats fit tighter rooms, and one full-size 11v11 footprint holds ten four to six small-sided fields.
What ceiling height do you need for indoor soccer in a gym?
At least 13 feet for playable small-sided soccer, and 16 to 20 feet is ideal because it allows extended-wall play and a better ball flight. Most gyms that host basketball already clear this.
Do you need a concrete foundation for an indoor soccer field?
It depends on the build. A fixed field, WSB Sport’s preferred option, uses at least a concrete perimeter. A free-standing system needs no concrete foundation at all and is self-supporting, which is the route for branches that can’t take on concrete work. Either way, the floor needs to be level and sound before installation.
How much does it cost to build an indoor soccer field?
Cost depends on the number of fields, indoor versus outdoor, and whether you build fixed or free-standing. A fixed, concrete-perimeter field is the more permanent option; a free-standing system skips concrete work entirely, which removes the largest line in most sports construction for branches that need to keep costs down. A feasibility study gives you the real number for your building.
Let’s look at your space
If you’ve got a gym, a field, or a room you think could work, the easiest first step is a site assessment. We can usually tell you fast whether the space makes sense and what building it out would involve. No construction project required to find out.
