Suffolk County · Long Island

Custom koi ponds,
built for real fish.

Fully excavated koi ponds sized for the fish load — 45-mil EPDM liner, mechanical + biological filtration, skimmer, stone edging, and integrated waterfall.

Call (631) 480-3238 Get Your Free Estimate

Lic # 58161-H·Fully Insured·Est. 1994·30+ Years

30+

Years serving Long Island

500+

Projects completed

5.0

Google review rating

Lic # 58161-H

NY License · Fully insured

What's built in

Details that separate
good work from great.

Four disciplines · One crew

№01

Sized for the fish load

External bio-filter + skimmer matched to fish count — not undersized pond-kit hardware.

Included in every build

№02

45-mil EPDM liner

Fish-safe EPDM over geotextile underlayment, seamed and boot-flashed at penetrations.

Included in every build

№03

Stone edge & waterfall

Natural boulder edge and integrated stone waterfall tied into filter return.

Included in every build

№04

Winter-ready depth

3–4 ft.+ deep with de-icer and aerator provisions for Long Island freeze months.

Included in every build

The build · Five stages

Five steps. One crew.

A cohesive process engineered for durability and professional delivery.

01
The Discovery
Free estimate
On-site measure, scope, and written proposal — no pressure, no upsell.
02
The Blueprint
Design & materials
Layout, samples, and finishes confirmed before we mobilize.
03
The Logistics
Build
Our own licensed crews — no subs — on-site daily until it's done right.
04
The Build
Walk-through
Punch list closed, site cleaned, and written workmanship warranty issued.

Est. 1994 · Lic # 58161-H

Frequently Asked

Answers before
you call.

How deep does a koi pond need to be on Long Island?

At least 3 ft. for winter survival; we build most at 3.5–4 ft. so koi can overwinter below the ice line.

How much does a custom koi pond cost?

Most residential koi ponds run $18k–$45k depending on size, filtration, stone selection, and waterfall scope. We give an itemized on-site estimate.

Do koi ponds need a permit in Suffolk County?

Depth and location trigger local rules; we handle permitting under License # 58161-H when required.

Where we work

Custom Koi Pond Design & Installation across
all of Suffolk County.

Serving Long Island's South Shore and central corridor. Licensed, insured, and locally owned — 30+ years building for the towns listed below and every Brookhaven and Islip neighborhood in between.