If you're considering a koi pond for your New York home, one of the first questions you'll have is: how much does it cost? We believe in transparent pricing, so here's a real breakdown based on our 33+ years of experience installing over 1,000 water features across NY, NJ, and PA.
Small Ecosystem Pond (6' x 8') — Starting at $9,995
Perfect for patios and smaller yards. Includes biological filtration (BioFalls), mechanical filtration (skimmer), rocks and gravel, an energy-efficient pump, aquatic plants, and a waterfall. This is a complete, self-sustaining ecosystem — not a liner-and-pump kit.
Medium Ecosystem Pond (11' x 16') — Starting at $14,995
Our most popular size. This gives you room for multiple koi, a larger waterfall, and more dramatic rockwork. Most homeowners in Orange County, Rockland County, and Sussex County choose this size.
Large Ecosystem Pond (16' x 21'+) — Starting at $24,995
For those who want a true showpiece. Extended streams, multiple waterfalls, and room for a large koi collection. These ponds become the centerpiece of outdoor living spaces.
What's Included in Every Pond
Every Garden State Koi pond includes: custom design consultation, professional excavation, EPDM rubber liner (lifetime warranty), BioFalls biological filter, skimmer with debris net, energy-efficient pump, natural boulders and gravel, aquatic plants, startup bacteria treatment, hands-on owner training, and a 1-year installation warranty.
Popular Add-Ons
LED lighting packages ($1,350–$2,550), fish packages ($75–$300), auto-dosing systems ($399–$599), and premium plant packages ($150–$520) are popular additions.
Why Costs Vary
Several factors affect the final price: site access (steep hills or tight spaces require more labor), soil conditions (rocky soil takes longer to excavate), distance from our Warwick, NY location, custom features like bridges or stepping stones, and the complexity of the stream or waterfall design.
How Garden State Koi Compares
As the only Certified Aquascape Contractor in Orange County, NY, we use professional-grade Aquascape equipment — the same products used in the world's most prestigious water features. Many landscapers offer cheaper pond installations using inferior materials, but these often fail within a few years and cost more to repair than a properly built ecosystem pond.
Get Your Custom Quote
Take our free Water Feature Quiz at gardenstatekoi.com/water-feature-guide for a personalized recommendation and pricing estimate. Or call us at 845-651-4100 to schedule a design consultation.