The cost to build a koi pond of quality is between $6,000 and $25,000, though it can go higher. The average cost is $15,000. This includes a waterfall. The only real cost factor is size but others can have a slight impact.
Size. The larger a koi pond is the more it’ll cost. But larger koi ponds do have more room for additions (and some swimming if it’s big enough). Smaller koi ponds can be pricier if you include more additions.
Shape. Koi ponds come in basic shapes like circles. If you want a custom shape it’ll be more of an investment, but it’ll be one-of-a-kind.
Materials. You can get a cheaper koi pond if your contractor uses cheap building materials. Higher-quality koi ponds do cost more but they work better and last longer. This means more enjoyment and less frustration and stress for you.
Additions. Additions are fun and awesome, but they do add to the overall koi pond cost. You can have underwater lights that change colors, logs, fish, and more.
But the cost of a koi pond goes beyond construction. You’ll want to have a professional maintain it so it keeps working and looking amazing in your yard.