Pond Renovation & Repair in Suffolk County, Long Island — APM O'Neill & Sons

Pond renovation
& leak repair.

Existing pond leaking, algae-choked, or under-filtered? We drain, assess, re-liner where needed, upgrade filtration, re-set stone, and hand it back running clean..

35
Years serving Long Island
500+
Projects completed
4.9
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

Leak detection

Systematic drop-test to isolate liner vs. plumbing vs. waterfall leaks.

Included in every build
№02

Re-liner & seam

45-mil EPDM re-liner or seam repair when the original liner is compromised.

Included in every build
№03

Filter & pump upgrade

Right-sized skimmer, bio-filter, and pump replacing failed pond-kit hardware.

Included in every build
№04

Stone re-set

Waterfall and edge stones re-set on fresh underlayment for a clean, natural finish.

Included in every build
Why homeowners choose us

Why hire us
for Pond Renovation & Repair.

Licensed & insured

Suffolk County HIC License # 58161-H with full liability and workers' comp coverage.

35 years on Long Island

Family-owned and operating across Suffolk County since 1991.

Workmanship warranty

Every installation is backed in writing — base prep, drainage, and finish work included.

Free written estimate

On-site measure and a clear, itemized proposal before any work is scheduled.

The build · Five stages

Five steps. One crew.

A cohesive process engineered for durability and professional delivery.

  1. 01
    The Discovery

    Free estimate

    On-site measure, scope, and written proposal — no pressure, no upsell.

  2. 02
    The Blueprint

    Design & materials

    Layout, samples, and finishes confirmed before we mobilize.

  3. 03
    The Logistics

    Build

    Our own licensed crews — no subs — on-site daily until it's done right.

  4. 04
    The Build

    Walk-through

    Punch list closed, site cleaned, and written workmanship warranty issued.

Est. 1991 · Lic # 58161-H
Frequently Asked

Answers before
you call.

01

My pond is losing water fast — is it the liner?

Not always. In most cases it's the waterfall edge or plumbing, not the liner itself. We isolate the actual leak point before quoting a re-liner.

02

Can you rebuild a pond someone else installed?

Yes — we take over failed pond-kit installs regularly. Most need filtration upsizing and waterfall re-setting more than a full re-liner.

03

Can you find a leak?

Yes — we isolate plumbing, liner, and waterfall leaks with a staged shutdown test rather than guessing.

04

Do you relocate fish during work?

Yes — koi are held in an aerated tank and returned once water chemistry stabilizes.

05

Can an old pond be converted to pondless?

Yes — that's a common renovation for families with young children.

Financing Available

Build now.
Pay monthly.

Flexible monthly payment plans for patios, driveways, and outdoor living projects across Suffolk County. Licensed & insured. Free estimates.

60-120mo
Terms
Hearth
Lending Partner
Fast
Approval
Outdoor living space with patio built by APM O'Neill & Sons

Financing provided by Hearth. 60-120 month terms. Subject to credit approval. Rates and terms vary by lender.