Start with a site plan and measure your space

Building a putt putt course begins with knowing exactly what you have to work with. Measure your available space in feet, then sketch it on graph paper or use a free tool like Google Draw or Canva to map out where each hole will go. A standard backyard course runs 9 to 18 holes and needs a minimum of 1,500 square feet for 9 holes, though more space gives you better hole variety and player flow.

Walk the space at different times of day to check for sun exposure, drainage problems, and existing obstacles like trees, fences, or utility lines. Mark wet spots or areas that stay shaded most of the day — these affect how your greens will play and how well they'll hold up. If you're building on a slope, note where water naturally runs; you'll want your course to drain away from the playing surface.

Key Takeaways

  • A 9-hole backyard course needs at least 1,500 square feet and a site plan drawn to scale showing hole placement and drainage.
  • Artificial turf, concrete, or asphalt form the playing surface; artificial turf costs more upfront but requires less maintenance than natural grass.
  • Obstacles like ramps, tunnels, windmills, and water features define each hole's difficulty and are built before the surface is installed.
  • Holes range from 15 to 50 feet in length, with par typically 2 or 3, and each needs a tee box, fairway, and cup sunk into the surface.
  • Budget $3,000 to $8,000 for a basic 9-hole backyard course, or $15,000 to $40,000 for a commercial-grade installation with themed obstacles.

Choose your playing surface material

The surface you choose affects cost, durability, maintenance, and how the ball rolls. Artificial turf is the most popular choice for putt putt courses because it drains well, requires no mowing, and plays consistently in any weather. Quality mini golf turf costs $8 to $15 per square foot installed. It lasts 8 to 10 years with basic care — occasional brushing and rinsing to remove debris.

Concrete is cheaper upfront ($3 to $6 per square foot) and extremely durable, but the ball rolls faster and less predictably than on turf, and concrete cracks over time in freeze-thaw climates. Asphalt falls between the two: it costs $2 to $4 per square foot, plays reasonably well, but needs resealing every 3 to 5 years and breaks down faster than concrete in harsh weather.

For a backyard course, artificial turf is worth the extra cost because it handles foot traffic better and looks finished. For a commercial operation, concrete with painted lines is standard because it's easier to repair individual sections and costs less to maintain at scale.

Design and build obstacles for each hole

Obstacles are what make putt putt fun and what separate an straightforward hole from a hard one. Common obstacles include ramps (to change elevation), tunnels (to block the direct line), windmills (spinning blades that block the ball), water features (ponds or streams the ball must cross), and walls or bumpers (to create angles and dead ends). Plan your obstacles before you install the surface, because they're built into or anchored to the ground.

Ramps and tunnels are typically made from PVC pipe, wood, or fiberglass and cost $200 to $800 each depending on size and material. Windmills are pre-made units you can buy from putt putt suppliers for $400 to $1,200. Water features require a small pump and basin; a basic pond costs $300 to $600 to build and maintain. Bumpers and walls are usually wood or plastic and cost $50 to $200 per hole.

Vary your obstacles across holes so no two feel identical. A typical 9-hole course might have 2 holes with ramps, 2 with tunnels, 1 with a windmill, 1 with water, and 3 with bumpers or open fairways. This keeps players engaged and gives you room to adjust difficulty.

Lay out tee boxes, fairways, and cup placements

Each hole needs three parts: a tee box where players start, a fairway (the main playing area), and a cup sunk into the surface at the end. Tee boxes should be 3 to 4 feet wide and 2 to 3 feet deep — large enough for two players to stand comfortably. Mark them with paint, rope, or a different colored turf section so players know where to start.

Fairways typically run 15 to 50 feet long for a backyard course; shorter holes (15 to 25 feet) are easier and faster to play, while longer holes (35 to 50 feet) challenge better players. The width varies by obstacle — narrow fairways (4 to 6 feet) force accuracy, while wider fairways (8 to 12 feet) are more forgiving. Cups are standard 4.25-inch diameter holes sunk 4 to 6 inches into the surface; you can buy pre-made cup liners for $20 to $50 each.

Assign par values: most holes are par 2 (one stroke to reach the cup, one to sink it) or par 3 for longer or more difficult holes. A 9-hole course typically totals par 18 to 20, which gives players a target score and makes it straightforward to keep score.

Install drainage and prepare the ground

Poor drainage ruins a putt putt course quickly — standing water damages the surface, creates uneven play, and breeds mold. Before you install your playing surface, grade the ground so water runs away from the course at a slope of at least 1 inch per 10 feet. If your site is naturally flat or wet, install a perforated drain line around the perimeter and run it to a low point or storm drain.

Compact the base soil with a hand tamper or plate compactor, then add 2 to 4 inches of gravel or crushed stone as a base layer. This provides drainage and a stable foundation for your surface material. If you're using concrete or asphalt, this base is essential; if you're using artificial turf, it prevents the turf from settling unevenly.

Test drainage by pouring water on the prepared ground — it should soak in or run off within a few minutes, not pool. If water sits, dig deeper or extend your drain line before moving forward.

Budget and timeline for a complete course

A basic 9-hole backyard course with artificial turf and straightforward obstacles typically costs $3,000 to $8,000 and takes 2 to 4 weeks to build, depending on site prep and whether you hire contractors. A 18-hole commercial course with themed obstacles, lighting, and a clubhouse runs $15,000 to $40,000 and takes 6 to 12 weeks.

Costs break down roughly as: site prep and drainage ($500 to $1,500), playing surface ($1,200 to $3,000 for 9 holes), obstacles ($1,500 to $3,000), cups and markers ($200 to $400), and labor ($1,000 to $3,000 if you hire help). Doing the work yourself saves labor costs but requires tools you may need to rent — a plate compactor ($50 to $100 per day) and a power drill for anchoring obstacles.

Maintenance costs are low: artificial turf needs occasional brushing and rinsing (minimal cost), while concrete or asphalt needs resealing every few years ($500 to $1,500 for a 9-hole course). Windmills and water features need seasonal checks and occasional repairs.

Common mistakes to avoid when building

The most common mistake is underestimating drainage — many builders skip proper grading or base preparation and end up with a course that floods or develops soft spots within a year. Spend time on site prep; it's the cheapest insurance against costly repairs later.

The second mistake is making obstacles too difficult or too similar. A hole that's impossible to par frustrates players and slows the game; a course where every hole feels the same gets boring fast. Test each hole with a few players before you finalize it, and be ready to adjust ramp angles, obstacle placement, or cup position based on feedback.

A third mistake is choosing the wrong surface for your climate. Concrete cracks badly in freeze-thaw regions; asphalt breaks down quickly in intense sun. Artificial turf works in almost any climate but costs more upfront. Know your weather patterns before you choose.

Frequently Asked Questions

Can I build a putt putt course on a slope?

Yes, but you'll need to grade it into level sections for each hole. A slope actually gives you design opportunities — you can use elevation changes as part of the obstacle. Just make sure water drains downhill away from the playing surface, not across it.

What's the minimum space needed for a 9-hole course?

About 1,500 square feet, though 2,000 square feet gives you more room to space holes apart and create varied obstacles. Holes can be as short as 15 feet or as long as 50 feet depending on your space and design.

How long does artificial turf last on a putt putt course?

Quality mini golf turf lasts 8 to 10 years with basic maintenance — brushing to remove debris and occasional rinsing. Heavy use (a commercial course with hundreds of players per week) may shorten that to 5 to 7 years. Concrete and asphalt last longer but require more maintenance.

Do I need a permit to build a backyard putt putt course?

Check with your local building department or zoning office. Most residential areas allow a small backyard course without a permit, but some require one if you're building obstacles or making significant ground changes. A commercial course almost always needs a permit and may need site plan approval.

What's the best surface for a beginner builder?

Artificial turf is the easiest to install and maintain, though it costs more upfront. Concrete is cheaper and more durable but requires more skill to pour and finish smoothly. If you're new to this, hire a contractor for the surface and build obstacles yourself to save money.