How much driveway space do you need for a basketball hoop?

A basketball hoop needs 20 ft (6.10 m) of driveway in front of the pole to shoot free throws, and 26 ft (7.92 m) to shoot a high school three-pointer from straight on. Both are for a hoop with the common 2 ft (61 cm) overhang, and both are the court plus the hoop. The free-throw line is 15 ft (4.57 m) from the backboard and the top of the high school arc is 21 ft (6.40 m) from it, so add the overhang, then 3 ft (91 cm) to stand behind the line. Width is the second number: 12 ft (3.66 m) for the lane and free throws, and 39 ft 6 in (12.04 m) for the whole high school arc. The rest of the garden is planned in outdoor room dimensions.

What driveway space means: measured from the pole, not the backboard#

Four terms decide the answer, and each is measured from a particular face.

• Overhang is "the distance from the front face of the pole to the front face of the backboard", in Goalrilla's words. Spalding and Lifetime call it the offset, and it lets players go under the rim without hitting the pole.
• The backboard plane is the front face of the backboard, and court lines are measured from it or from the centre of the rim in front of it.
• The free-throw line is where a player takes a foul shot, "15 feet from the plane of the backboard" in Wikipedia's court article.
• The three-point line is an arc round the basket, and a shot from behind it scores three. It is measured from the centre of the basket, at a distance that varies by league.

On this page, driveway space is the paved area in front of the pole, with its depth running from the front face of the pole, through the rim, to the far edge of the paving and its width across that line. The pole is the part set in concrete, usually at the paving edge, so that is where to measure from. A depth taken from the backboard leaves out the overhang: 2 to 5 ft (0.61 to 1.52 m) on the hoops below.

15 ft, 21 ft and 25 ft: the lines on a real court#

The National Federation of State High School Associations (NFHS) writes US high school rules, and its basketball court diagram gives these figures:

• The backboard face is 4 ft (1.22 m) inside the end line, and the centre of the rim is 15 in (38 cm) in front of the board.
• The free-throw line is 15 ft (4.57 m) from the board, with its outside edge 19 ft (5.79 m) from the end line. The shooter stands inside a semicircle of 6 ft (1.83 m) radius drawn on it.
• The three-point line is 19 ft 9 in (6.02 m) from the centre of the basket to its outside edge.

Add the 15 in from board to rim centre, and the top of the high school arc is 21 ft 0 in (6.40 m) from the board. Its straight ends run out 63 in (1.60 m) from the end line, level with the rim centre (4 ft plus 15 in). The college and professional lines, from Wikipedia's table, sit further out:

The last column adds the NFHS 15 in to each arc, which is where a US hoop puts its rim. FIBA's own drawing was not read here, so its row is the FIBA arc on a US-style hoop.

The ring is 18 in (46 cm) across inside, in the NFHS diagram and on Lifetime's page for its 90569 hoop, so its inside edge reaches about 24 in (61 cm) in front of the board; Goalrilla's "25 inches of rim" includes the steel.

Overhang on 24 home hoops: 2 to 5 ft#

Each figure below is printed on the maker's own product page, and Goalrilla's are maximums because "Overhang changes as the basketball goal is adjusted".

The overhang grows with the backboard: every 72 in board here has 4 ft or more, and every board of 54 in or less has 3 ft or less.

Goalrilla advises "approximately 2 feet to 4 feet of overhang for the best balance of safety and performance", and 22 of these 24 hoops fall inside it. At 5 ft or more, it says, "the weight of the glass backboard will increase shake", and the hoop "will actually encroach on the play surface by more than 7 feet once you add the 25 inches of rim".

Depth: the overhang, plus the line, plus 3 ft to stand#

The depth you need from the pole face is one sum:

depth = overhang + distance from the board to the line + 3 ft (91 cm)

The 3 ft is room for a shooter's feet behind the line, taken from the NFHS diagram's minimum of clear space outside a court's boundary, which should "preferably" be 10 ft (3.05 m). Treating the far edge of the paving as that boundary is the site's choice, not a rule.

A portable hoop's base sits on the paving, so measure from the front of the base. Silverback's NXT 54 portable has "a 2.5-foot overhang that delivers 26 inches of clear playing space under the goal": the base takes about 4 in (10 cm) of it, while a wall-mount hoop is measured from the wall.

Width: 12 ft for the lane, 39 ft 6 in for the whole arc#

Quick answers online run from 12 x 15 ft up to "30 to 40 ft wide". Both are parts of one court: the 12 ft lane out to the free-throw line, and the three-point arc from side to side.

Twelve feet (3.66 m) is the free-throw circle across, and the lane width in US college play in Wikipedia's table; the NBA and FIBA lane is 16 ft (4.88 m). The whole high school arc is 39 ft 6 in (12.04 m) across its outside edges, at the level of the rim, and 45 ft 6 in (13.87 m) with 3 ft to stand at each end. The NBA's corner lines are 22 ft (6.71 m) from the rim and 3 ft from the sideline, so its arc fills the full court width of 50 ft (15.24 m).

On a narrower driveway, the width decides how far round the arc you can shoot. With the rim in the middle and the shooter on the line, the reachable part is twice the angle whose sine is half the width over the arc radius, which is the site's own geometry:

The site's garage sizes page builds a double garage 24 ft (7.32 m) wide; a driveway that wide reaches 75 degrees of the arc. One that only spans the common 16 ft (4.88 m) double door in garage door sizes reaches 48.

Two ways to set a hoop on a 20 x 36 ft driveway#

Take a two-car driveway 20 ft (6.10 m) wide and 36 ft (10.97 m) long, and a hoop with a 2 ft (61 cm) overhang such as the Silverback SB54, and walk the pole through both places it could go.

Across the driveway. With the pole beside one long edge, the depth is the driveway's 20 ft width. With the board 2 ft in, 18 ft (5.49 m) is left in front of it: the free-throw line plus 3 ft, with nothing to spare. The top of the high school arc falls 3 ft (91 cm) past the far edge, in the lawn.

Along the driveway. The pole stands at one end, leaving 34 ft (10.36 m) in front of the board. The NBA top needs 28 ft with room to stand, so it fits with 6 ft left over. The 20 ft width gives about a third of the high school arc and 50 degrees of the NBA arc, both round the top of the key, and the corners are off the paving.

The last row is the one people forget, because a standard US parking stall is 18 ft (5.49 m) long in car parking space dimensions. Park one car at the far end and only 16 ft is left in front of the board, with nowhere to stand behind the free-throw line. So the along layout works only when the cars are in the garage; the across layout keeps room for a car and gives up the three.

What the overhang buys under the rim, and what it costs#

The overhang is the room behind the rim, where a player finishing a layup keeps moving. The rim centre is the overhang plus 15 in (38 cm) from the pole: 3 ft 3 in (0.99 m) with a 2 ft overhang, 4 ft 3 in (1.30 m) with 3 ft, 5 ft 3 in (1.60 m) with 4 ft and 6 ft 3 in (1.91 m) with 5 ft.

On the NFHS court the rim centre is 5 ft 3 in from the end line, and the diagram asks for at least 3 ft of clear space beyond: 8 ft 3 in (2.51 m) to the nearest obstruction. A 4 ft overhang puts the pole on a court's end line, and reaching 8 ft 3 in would take 7 ft of overhang, and none here has more than 5 ft, which is why Goalrilla says "a pole pad is always a good idea".

The cost is depth: with the pole at the paving edge, each extra foot of overhang moves the board, and every line, a foot further into the driveway. On a short driveway a 2 ft overhang leaves the most room to shoot; on a long one, 4 ft gives the room under the rim that a court has. Keep the court clear of other play zones too, such as the trampoline zone and the swing set zone.

Lowered rims, wall mounts and the garage door#

A lowered rim. Goalrilla's adjustable hoops, the Lifetime 90568 and the Spalding U-Turn go from 7.5 ft (2.29 m) to 10 ft (3.05 m), the height Wikipedia gives for every court. Lowering the rim does not move the lines on the ground, but Goalrilla says the overhang changes with height, so read its chart at the height you will use most.

A wall mount. The wall is the pole face, and Silverback's NXT 54 wall mount has a 2.5 ft (76 cm) overhang. On a garage wall the door becomes the end line, and a missed shot hits the panels.

Where these numbers stop applying#

No code sets a size for a home basketball area, so every figure here is court geometry from the NFHS diagram and Wikipedia's table, plus the overhangs the makers print; the 3 ft to stand is the site's choice. The NFHS itself calls its diagram "suggestive only" outside what the rules require, each overhang is the maker's figure for the model named, and Goalrilla's is a maximum.

These numbers do not say where a hoop may stand on the lot, because distance from the street and property line, and any homeowners' association rule, are set locally, as they are for the shed size without a permit. Nor do they cover driveway slope, balls running into the street, overhead wires, trees over the rim or lighting for evening play, which have to be checked on site.

Metric figures are conversions, as imperial and metric dimension systems explains, and the unit converter turns any other figure here into metric. The documents behind the site's figures are listed in standards and codes.