What a Backyard Basketball Court Costs in St. Louis
Revised September 22, 2026
How much does it cost to build a basketball court in your yard in St. Louis?
The slab drives the number, not the hoop. Square footage, how much grading your yard needs, slab thickness, reinforcement, the sub-base under it, and where the water goes matter far more than surfacing or the goal. Prices swing hard by yard and by contractor, so get two or three quotes.
Keep reading ↓The hoop is bolted to the garage fascia, slightly crooked, the way they always end up. Ball goes up, rattles the rim, drops, and then keeps rolling, because the driveway falls off toward the street at whatever pitch the builder poured decades ago. Somebody sprints after it. A car slows down. That is the moment a backyard court actually gets decided, with a kid standing in the street holding a ball.
Two phone calls into pricing a real pad out back, most people learn the same thing. The hoop was never the expensive part. You aren’t buying a basketball goal. You’re buying flatwork, and flatwork in eastern Missouri has opinions.
Chalk lines on the grass are a good first move. Mark the footprint, walk it, shoot on the grass for a week and see whether the size feels right. Then start asking about what goes underneath it, because the dirt decides both the price and the lifespan.
How much does it cost to build a basketball court in your yard in St. Louis?
The slab drives the number, not the hoop. Square footage, how much grading your yard needs, slab thickness, reinforcement, the sub-base under it, and where the water goes matter far more than surfacing or the goal. Prices swing hard by yard and by contractor, so get two or three quotes.
Nobody honest prices this over the phone. Any square-foot figure you found online was quoted in another state, in another year, on a flatter lot, with cheaper trucking. Two yards a mile apart in South County can come back thousands apart and both bids can be correct. One needs a truckload of fill and a drain line. The other needs a skid steer for an afternoon and a broom.
So treat any range you read, including one you hear from a neighbor, as something that varies by yard and by contractor. What you can actually control is knowing which decisions move the number. Court cost is roughly square footage multiplied by site conditions, plus a short list of choices about thickness, steel, joints, drainage and surface. Learn those, then get quotes from people who have stood in your backyard.
Where does the money actually go on a backyard court?
Into dirt and concrete. On most residential courts, excavation, sub-base, forms, reinforcement and the pour eat the large majority of the budget. The goal, the net and the painted lines are small by comparison. People shop the hoop first because the hoop is the part that photographs well in a catalog.
Excavation and grading
Your yard isn’t flat. A court has to be. Somebody has to cut into the high side, build up the low side, and either haul the difference off or spread it where it does some good. Cut and fill is the least predictable line on a court budget. A pad area with a two-foot fall across it is a different job from one with an eight-foot fall, and the second may need a retaining wall before anyone talks about concrete at all.
Access changes the math too. If a ready-mix truck can back within a chute length of the forms, great. If it can’t, because the only route to the back of a narrow Tower Grove lot is a four-foot gate, then material moves by buggy, conveyor or pump. That’s labor and equipment, and it shows up in the bid whether or not anybody explains it.
The sub-base under the slab
Crushed stone, placed in lifts and compacted to a depth your contractor specifies for your soil. This is the layer homeowners cut first, because nobody will ever see it, and it’s the layer doing the most work. It spreads the load across soft spots, and it gives water a path that isn’t the underside of your concrete. Go cheap here and you’ve built an expensive cracker on top of pudding.
Slab, steel and forms
Thickness is real money. Every extra inch across a pad the size of a three-car garage floor is a meaningful jump in yardage, and the concrete itself is priced by the yard. Reinforcement is a separate decision: welded wire mesh laid flat is cheaper than rebar tied in a grid and held up on chairs, and it doesn’t behave as well over moving soil. Forms, screeding, finishing and curing are labor hours. If that sounds familiar, it should. Our breakdown of what a concrete driveway costs in St. Louis is built on the same handful of variables.
Everything sitting on top
Surface coating, the goal, its footing, fencing, lighting, lines and nets. Any one of those is modest. Together they can rival a chunk of the slab. One adjustable in-ground hoop with a decent backboard is a manageable purchase. Two goals, black vinyl fence on two sides, and pole-mounted lighting is a second project riding on the back of the first.
Why does St. Louis clay decide whether your slab survives?
Eastern Missouri sits on expansive clay. Every contractor who pours here knows it, and it’s the quiet reason two identical-looking courts age completely differently. Clay swells when it takes on water and shrinks back when it dries, so the ground under a flat slab rises and settles with the seasons. Now add a St. Louis winter, where a slab can cross the freezing line again and again between December and March. Those two forces, together, are what break flatwork.
Which means the boring items on an estimate are the ones worth your attention. Not the color. Not the net. The dirt, the stone, the steel, the joints and the drain. Every one of those is a fair question to put to your concrete contractor, and the answers tell you a lot about who you’re talking to.
Ask about the sub-base by name
Say it plainly: what depth of compacted aggregate are you putting under my slab, what material, compacted in what lifts, and why that number for this soil? You’re not quizzing anybody. You’re listening for whether there’s a reason behind the spec or just a habit. Ask what happens if they hit soft clay while they’re digging, because on plenty of lots around here, they will.
Reinforcement and the joint plan
Concrete cracks. That’s a material property, not a defect, and a court is one big uninterrupted plane of the stuff. Control joints decide where those cracks show up. Tooled or saw-cut, laid out on a grid, at spacing tied to the slab thickness. On a sport surface the joint layout is also a play decision, because a joint running straight through the free-throw line is a spot where a hard dribble skips sideways. Ask where the joints will land relative to the key and the arc, and ask about air-entrained mix for freeze-thaw exposure.
Where the water goes
You’re about to drop a thousand square feet or more of impervious surface into a yard that used to soak up rain. That water still exists. If nobody decided where it goes, it decides on its own, and its favorite destination is usually a foundation. Occasionally it picks the neighbor’s yard, which turns a fun summer project into a conversation nobody wanted.
Answers vary by lot. A consistent pitch across the pad. A trench drain along the low edge. A swale. A dry well. Pipe daylighted somewhere downhill that isn’t someone else’s problem. The specific solution matters less than the fact that somebody chose one on purpose and can point at it on the ground.
Is asphalt, concrete, or modular tile the right surface?
Concrete for longevity, asphalt for a lower up-front number, modular tile as a layer that sits on top of either one. They aren’t three competing products, which is where the comparison usually goes wrong online. Two are pavements. One is a covering. A lot of good courts are a combination.
Concrete
Rigid, long-lived, and the default choice for a residential court in this climate when the budget allows. It costs more going in. It holds a true plane better over clay, it doesn’t soften in August heat, and it accepts tile, coating or paint later. The tradeoff: when concrete does fail, it fails visibly and repairs are patches, not invisible fixes. Get the sub-base and the reinforcement right and that day is decades out.
Asphalt
Flexible pavement, cheaper to install, faster to put down, and genuinely common on outdoor courts. It moves with the ground instead of fighting it, which sounds ideal on clay until you remember that it also softens in summer, requires periodic sealing, and needs a cure period before anything gets coated over it. Budget for maintenance you’ll actually have to do. An asphalt court that never gets sealed ravels at the edges and starts shedding aggregate.
Acrylic sport coating
This is the cushioned, colored, textured system you see on tennis and pickleball courts, built up in layers over asphalt or concrete. It plays great, it looks finished, and it turns your pad into something that reads as a court rather than a patio with a hoop. It also needs recoating on a cycle, and it telegraphs any crack that opens up underneath it.
Modular tile over a slab
Interlocking polypropylene tiles snap together over an existing slab, no adhesive, and the good ones are shock-absorbing and drain through. Nice knees. Nice ball bounce. Easy color and line layout, and you can lift a damaged tile out and replace it. The catch is honest: tile is a surface, not a foundation. Lay it over a slab that heaves and you’ll feel the ridge through your shoes within a season or two.
How big does the pad need to be, and where can it sit?
A regulation NBA court runs 94 by 50 feet. High school is 84 by 50. Nobody is fitting that behind a house in Ballwin. Actual backyard courts are half courts, narrowed half courts, or a key-and-arc shooting pad, and the useful question isn’t how big it can be. It’s what you want to practice on it.
Here’s the dimensional reality, which is the one part of this post that doesn’t vary by contractor. The free-throw line sits 15 feet from the face of the backboard. The high school three-point arc is 19 feet 9 inches from the center of the rim. The NBA arc is 23 feet 9 inches at the top and 22 feet in the corners. Those distances are fixed, so your pad either contains them or it clips them.
A true half court is 47 by 50 feet. Plenty of families are thrilled with 30 by 50, which keeps the whole arc and gives up the sidelines. A 30 by 30 pad holds the key, the free-throw line and the top of a high school arc with almost nothing to spare, and the corner three disappears entirely. A 20 by 25 pad is a shooting station, and that is a completely legitimate thing to build.
Placement is its own puzzle. Property lines and easements first, then the septic field or lateral lines if you’re on one, then utilities, which must be located before anybody puts a blade in the ground. Watch the trees: roots under a slab are a future crack, and a court under heavy shade stays wet, grows algae and gets slick. Note where your downspouts discharge. Think about which neighbor’s bedroom window faces the spot you want to light. A new-build lot in Wentzville with a flat half acre is a different conversation from a sloped lot with a mature oak in the only open corner.
One more overlap worth catching early. If the flattest part of your lot is also where a future garage or addition would go, price the two together before you pour, because a slab is an awkward thing to demolish. Our look at what it costs to build a garage in St. Louis is a useful comparison if you’re weighing which project takes the good ground.
What the next owner sees
A court is a taste amenity, and that cuts both ways. A well-built pad with a clean surface, straight joints, a hoop that still adjusts and water that clearly goes somewhere reads as a feature. Some buyers will love it outright. Others see a pad they can turn into a patio, a shop floor or a pickleball setup, which still counts as flexible square footage rather than a liability.
The other version is a cracked, weed-seamed slab with a rusted goal leaning over it and a green stripe where runoff crosses it. That’s not neutral. That’s a removal estimate in the buyer’s head, and demolition and haul-off of reinforced concrete isn’t cheap. Build it well or build it smaller. A modest pad done right ages better than an ambitious one done thin.
Do you need a permit, and who else gets a say?
Depends entirely on where you live, and this metro is a patchwork of dozens of jurisdictions that don’t agree with each other. Whether a slab, a hoop footing, a fence or a light pole triggers a permit is set by your specific municipality, or by the county if you’re in an unincorporated area. Rules differ on impervious surface coverage, setbacks, fence height and electrical work.
Call your own city or county building department before you spend a dollar. Ask about the slab, the footing, the fence and any wiring as four separate questions, because the answer can be different for each. Ask about impervious coverage limits by name. Get whoever answers to tell you what drawing or site plan they want to see.
Then read your subdivision indentures, because in a lot of St. Louis neighborhoods the trustees are the stricter authority. HOA and subdivision covenants routinely regulate permanent structures, fence type and color, lighting, and sometimes the hoop itself. A project that sails through city review can still get stopped by a covenant from 1978. Better to find that out on a phone call than after the forms are set.
What do the hoop, the footing, the fence and the lights add?
A real in-ground goal is a small foundation project of its own. The pole sits in a footing, or in an anchor sleeve set in a footing, dug below the local frost depth so seasonal freezing doesn’t heave it out of plumb. That footing usually gets poured before or separately from the slab, with an isolation joint around the pole so slab movement doesn’t torque it.
Ask about extension and backboard while you’re at it. The distance the backboard hangs out past the pole is what keeps a driving player from meeting steel, and the wider, thicker boards behave much better than the budget ones. Height adjustment is worth paying for if you have a seven-year-old, because a rim they can reach is a rim they use.
Fencing is the sleeper cost. Ball containment on the open sides saves you fifty trips into the neighbor’s hostas, and a half-height fence behind the baseline does most of the work of a full one for much less. Rebound netting on posts is a lighter, cheaper option that plenty of families prefer. Lighting means a trench, conduit, a licensed electrician and a real conversation about glare direction and hours. Lines can be painted on, inlaid in a coating system, or laid out in contrasting tile, and that choice is mostly about how permanent you want them.
Feeding the crew after? Try what to order at an Armenian restaurant.
How do you pick someone to pour it?
Shortlist two or three contractors worth interviewing, then interview them. Not a bid-collecting exercise. An actual conversation in the yard, where you state plainly what you want and expect: this slab thickness, this reinforcement, a joint plan that keeps cuts out of the key, and a drainage solution you can point to on the ground.
Then compare what you asked for against what each one is prepared to deliver. The gap is the signal. Not the price. One contractor tells you why they want more stone than you expected on your particular soil, walks the low corner with you, and explains what they’ll do if they hit soft clay at eighteen inches. Another says concrete is concrete. You just learned something more useful than a number.
Look at their flatwork, in person, on jobs that have been through at least a couple of winters. Fresh concrete always looks good. Four-year-old concrete tells the truth. Ask who actually runs the crew and who’s finishing the surface. Confirm insurance. Our guide to how to hire a concrete contractor in St. Louis goes deeper on the vetting, and it applies to a court exactly the way it applies to a patio.
Ready to walk the yard with someone? Browse basketball court builders around St. Louis on St Louis Near Me Directory, pick two or three, and have your size and your drainage questions ready.
If you’re the crew that pours slabs and builds backyard courts around St. Louis, this part is about your next customers. - If you pour flatwork or build courts for a living, being the name homeowners and AI tools say first is the whole game now, so list your concrete or court work.
Frequently asked questions
Do I need a permit to build a basketball court?
Maybe, and only your jurisdiction can tell you. Requirements for a slab, a hoop footing, a fence and any lighting are set municipality by municipality, or by the county in unincorporated areas, and this metro has dozens of them. Call your own building department first, then check your subdivision indentures, because trustees and HOA covenants are often the stricter constraint.
What is the cheapest way to build a basketball court?
Build less court. A key-and-arc shooting pad on the flattest part of your yard, bare broom-finished concrete or asphalt, painted lines, and one adjustable goal covers most of what a family actually uses. Skip the fence, the lights and the tile at first. Do not economize on excavation, sub-base or reinforcement, since those are the items that decide whether you pay twice.
Is asphalt or concrete better for a basketball court?
Concrete generally lasts longer and holds a truer plane, which matters on expansive clay and through freeze-thaw winters. Asphalt costs less going in, flexes with ground movement, and needs periodic sealing plus a cure period before coating. Both work outdoors. Concrete is the more common residential choice here when the budget allows it.
Does a basketball court add value to a home?
It’s a taste amenity, not a guaranteed return. A sound, well-drained pad with a clean surface appeals to some buyers and reads as flexible space to others, since it converts to a patio or pickleball court easily. A cracked slab with a rusting goal works against you, because the buyer is mentally pricing demolition and haul-off.
How much does it cost to pour a concrete slab for a basketball court?
It varies by yard and by contractor, so treat any figure online as orientation only. The drivers are square footage, how much cut and fill your lot needs, sub-base depth, slab thickness, whether you use mesh or rebar, truck access, and drainage work. Get two or three quotes from people who have walked the actual site.
Is 30x30 big enough for a basketball court?
Big enough to play on, not a regulation half court. A real half court is 47 by 50 feet. On 30 by 30 you fit the key, the free-throw line 15 feet off the backboard, and the top of a high school arc at 19 feet 9 inches with very little margin. Corner threes and sideline play are gone.
How thick should a backyard basketball court slab be?
That’s a spec your contractor should set for your soil, your sub-base and your drainage, not a number to copy from a forum. What you can do is ask for the reasoning and ask about reinforcement in the same breath, since thickness, steel type and joint spacing work together. Rebar on chairs outperforms mesh laid flat over moving clay.
Can you put modular tile over an existing driveway or patio?
Often yes, if the slab is sound, reasonably flat and drains. Tile is a surface layer, so it inherits whatever is beneath it. Check for heaved joints, active cracks and low spots that hold water, and remember that a sloped driveway still plays like a sloped driveway once the tile is down. Fix the base before you cover it.
Written by a dedicated team of St. Louis locals who live, work, and play right here in the St. Louis metro. Founder Lane Forman and team are committed to building the region’s most trusted directory by verifying listings and connecting local businesses with loyal customers across Missouri and Illinois.