Retaining Walls in Suffolk County, Long Island — APM O'Neill & Sons
Suffolk County · Long Island

Retaining walls
built to hold.

Segmental block and natural-stone retaining walls with frost-depth footings, geogrid reinforcement, weep pipe, and drainage stone — engineered to hold grade for decades on Long Island soils..

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

Engineered footings

Frost-depth compacted base or poured footing per wall height and load.

Included in every build
02

Geogrid reinforcement

Geogrid tie-backs on any wall over 3 ft. — code-compliant and inspected.

Included in every build
03

Full drainage

Perforated weep pipe, 3/4" drainage stone, and geotextile behind the wall.

Included in every build
04

Cap & finish

Bull-nose, wash, or natural-stone caps set in polymer or mortar.

Included in every build
Selected Work · 20252026

A portfolio
built across
Long Island.

Full Portfolio
Fieldstone retaining wall in front of estate home
01
Bellport, NY
Fieldstone retaining wall
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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. 1994 · Lic # 58161-H
What clients say · Verified Google reviews

Straight from
our neighbors.

5.0/ 5.0 average

Based on 6+ verified reviews from homeowners across Suffolk County. Every project is warrantied in writing and completed by our own crew — no subs.

Read all reviews on Google

Ready to get started? Free on-site estimates across Suffolk County.

(631) 480-3238
Frequently Asked

Answers before
you call.

01

Do I need a permit for a retaining wall?

Anything over 4 ft. of exposed face typically needs a permit and stamped drawing. We handle it in-house.

02

Block or natural stone?

Segmental block is stronger and cheaper per foot; natural stone is more architectural. We build both.

APM O'Neill & Sons

Your Dream Outdoor Living Space With Low Monthly Payments

Flexible Monthly Payments Available

Licensed & Insured · Free Estimates · Serving Suffolk County, NY

(631) 480-3238
Outdoor living space with patio built by APM O'Neill & Sons
Call Today:(631) 480-3238