Koi pond cost in 2026
Koi pond costs $3,500 to $17,000 in 2026 for most homeowners, with a typical price near $10,600.
Is your quote fair?
Type the price you were quoted. We compare it to the usual 2026 range of $3,500 to $17,000.
What moves the price
- Pond size and depth set the price, and larger ponds need bigger liners and pumps.
- Equipment such as filters, heaters, UV sterilizers and lights adds a lot to the total.
- Fish and plants are extra costs on top of the build.
- Where you live. Labor in big cities costs more than in small towns.
What is included
The range covers labor and materials for a typical koi pond. It does not include permits unless the tables say so, or extra repairs found once work starts. Get a written quote that lists each part of the job.
Koi pond cost by size
| Size | Typical dimensions | Average cost installed |
|---|---|---|
| Mini | 6' x 8' | $3,500 to $13,000 |
| Small | 8' x 11' | $6,500 to $18,000 |
| Medium | 11' x 16' | $11,000 to $27,000 |
| Large | 15' x 20' | $17,000 to $36,000 |
| XL | 21' x 26' | $30,000 to $60,000 |
| XXL | 24' x 36' | $35,000 to $95,000+ |
Average prices in US dollars. Source: HomeGuide.
Cost factors to build a koi pond
| Factor | Small (8'x11', 1,900 to 3,200 gallons) | Medium (11'x16', 3,900 to 6,600 gallons) | Large (15'x20', 6,700 to 11,200 gallons) |
|---|---|---|---|
| Excavation cost | $150 to $250 | $300 to $500 | $500 to $800 |
| Underlayment cost | $90 to $220 | $140 to $300 | $190 to $400 |
| Liner cost | $190 to $1,900 | $270 to $2,600 | $380 to $3,500 |
| Pump cost | $100 to $300 | $250 to $700 | $700 to $1,500+ |
| Filtration system cost | $100 to $500 | $450 to $1,000 | $850 to $2,000 |
| Heater cost | $50 to $500 | $1,000 to $2,000 | $2,000 to $3,500 |
| UV sterilizer cost | $180 to $250 | $200 to $350 | $300 to $600 |
| Lighting cost | $50 to $200 | $250 to $800 | $1,000 to $3,000 |
| Aquatic planting cost | $100 to $550 | $200 to $700 | $300 to $1,500 |
| Filling the pond (garden hose) | $20 to $30 | $40 to $70 | $70 to $110 |
Average prices in US dollars. Source: HomeGuide.
Why this costs more in 2026
Labor is the biggest part of most home jobs, and skilled trade pay keeps rising. Many materials and parts are imported, and freight went up after the oil shock that began with the Iran war in February 2026. Steel, copper, aluminum and resin all cost more too, so quotes for koi pond are higher than they were a few years ago.
Ways to pay less
- Start with a smaller pond and skip optional extras like heaters and fancy lights.
- Buy basic equipment and add upgrades later as your budget allows.
- Get at least three written quotes and compare them line by line.
Where the price comes from
The range on this page comes from one named price guide. We read every number on its page and show the date it was last updated.
- HomeGuide: Koi pond cost guide, page dated January 31, 2024
Common questions
How much does this cost in 2026?
Koi pond costs $3,500 to $17,000 in 2026 for most homeowners, with a typical price near $10,600. Most people pay about $10,600 per project. The low end is $3,500 and the high end is $17,000.
What changes the price the most?
The biggest factors are: Pond size and depth set the price, and larger ponds need bigger liners and pumps; Equipment such as filters, heaters, UV sterilizers and lights adds a lot to the total; Fish and plants are extra costs on top of the build.
How can I pay less?
Start with a smaller pond and skip optional extras like heaters and fancy lights. Buy basic equipment and add upgrades later as your budget allows. Get at least three written quotes and compare them line by line.
Where do these numbers come from?
From one named price guide, HomeGuide. It is linked on this page with the date it was last updated.
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