One of the first questions Long Island homeowners ask us is: "What's this going to cost?" It's a fair question, and we believe in giving you straight answers. Pond pricing varies based on size, materials, filtration systems, and site conditions — but the ranges below reflect what you can realistically expect from a fully-installed, professional-grade water feature in Nassau County.
Scott Anderson Design handles projects ranging from under $10,000 to $250,000+ for large estate installations. Every project is custom-quoted after a free on-site visit.
| Water Feature | Size | Price Range | Best For |
|---|---|---|---|
| Small Ecosystem Pond | 8×11 ft | $7,000 – $10,000 | First-time pond owners, compact yards |
| Medium Koi Pond | 11×16 ft | $10,000 – $18,000 | Fish enthusiasts, entertaining spaces |
| Large Custom Pond | 16×21 ft+ | $18,000 – $35,000+ | Estate properties, aquascape enthusiasts |
| Pondless Waterfall | 3–18 ft stream | $4,000 – $10,000 | Families with young children, low-maintenance |
All prices are fully installed and include labor, filtration, pump, liner, Long Island boulders, and gravel. Prices reflect standard installations — complex sites with difficult access, extensive excavation, or premium stonework may be higher.
Deeper ponds require more excavation, larger liners, and more powerful pump and filtration systems. A 24-inch minimum depth is recommended for overwintering koi in Long Island's Zone 7 climate — going deeper adds cost but adds protection for your fish.
The biological filter (biofalls) and skimmer are the heart of a healthy ecosystem pond. Premium Aquascape commercial-grade systems last longer and require less maintenance than entry-level alternatives. We only install systems we stand behind.
Natural Long Island boulders and moss rock create the authentic, naturalistic look our ponds are known for. More elaborate stone compositions — stacked walls, terracing, stream channels — add both beauty and cost. Stone is the single biggest variable in custom projects.
Submersible LED lights and underwater spotlights transform your pond after dark. Lighting packages typically add $500–$2,500 to the base installation cost depending on the number of fixtures and whether you're lighting both the waterfall and the pond floor.
Koi and goldfish can be added as part of the installation or sourced separately. High-quality koi from reputable breeders range from $20 for standard fish to $500+ for premium butterfly koi. We can advise on appropriate stocking levels for your pond's bioload.
Difficult access (narrow gates, slopes, existing hardscape) requires more labor. Rocky or clay-heavy soil on Long Island may require additional excavation equipment. We assess site conditions thoroughly during your free consultation before quoting.
A well-designed small ecosystem pond or compact pondless waterfall. You'll get a complete Aquascape filtration system, natural Long Island stone, and a self-sustaining water feature that requires minimal maintenance. Perfect for homeowners who want to test the water (so to speak) before committing to a larger project.
This is where most Nassau County homeowners land. A medium koi pond with a waterfall, biological filtration, naturalistic boulders, and room for 8–12 koi. You can add a stream, upgraded lighting, or aquatic planting at this level without breaking the budget.
Large ecosystem ponds, multi-tiered waterfalls, integrated streams, premium stonework, and full landscape integration. These projects transform a backyard into a destination. We handle permitting, site prep, construction, planting, and fish stocking — all under one roof.
Scott Anderson Design regularly designs and builds estate water features for Long Island's luxury properties — multi-pond systems, resort-style poolscapes with integrated water features, and full backyard transformations combining ponds, patios, outdoor kitchens, and lighting. Scott's architectural background gives him a unique edge for projects of this scale.
Free on-site consultation — no obligation. We'll walk your property and give you a real number.