
Masonry
Contractors.
Retaining walls, stoops, chimneys & stone veneer across Suffolk County. Frost-depth footings, drainage tile, finish work you notice up close.
A masonry contractor
built on 30+ years of Long Island stone.
APM O'Neill & Sons is a fully licensed masonry contractor (License # 58161-H) serving Suffolk County and the greater Long Island region. For more than three decades our crews have been laying retaining walls, front stoops, chimneys, stone veneer, and brick & block across Medford, Bellport, Patchogue, Holbrook, and Sayville — the kind of work that has to survive salt air, freeze-thaw winters, and the shifting sandy soils this island is famous for.
Every masonry project starts below the surface. Frost-depth footings, compacted stone base, drainage tile, and weep pipes go in before the first stone is set. It's why our retaining walls in Medford and bluestone stoops in Patchogue still read tight and level a decade later — while cheaper walls built the same year lean, spall, and heave.
We work in natural stone — fieldstone, bluestone, granite, limestone — and in manufactured stone veneer when the wall assembly or budget calls for it. Full brick and CMU block for structural work, chimneys, and foundations. Every job runs with our own career masons, our own equipment, and one project manager from estimate to warranty. No sub-crews cycling through your property.
Our repair work is just as large a share of the calendar. Chimney rebuilds above the roofline, crown seals, tuckpointing on older Bellport and Blue Point homes, stoop repair, and full masonry restoration on estates across the South Shore. If the existing work is sound, we say so; if it needs to come down, we tell you that too — and give you the honest price to do it right.
Call (631) 480-3238 for a free on-site estimate. We'll walk the project with you, measure, discuss stone and drainage, and put a written itemized proposal in your hands — no pressure, no bait pricing.
Details that separate
good work from great.
Engineered footings
Frost-depth footings, rebar reinforcement, and drainage tile behind every retaining wall we build.
Natural & manufactured stone
Bluestone, granite, fieldstone, limestone, brick, and cultured veneer — sourced and matched on-site.
Repair & repointing
Chimney rebuilds, crown seals, tuckpointing, stoop repair, and full masonry restoration.
Architectural detail
Bull-nose treads, wash caps, corbelled courses, and cut copings — finish work you notice up close.
A portfolio
built across
Long Island.
Five steps. One crew.
A cohesive process engineered for durability and professional delivery.
- 01The Discovery
Site walk
Measure elevations, check drainage, and photograph the existing conditions.
- 02The Blueprint
Design & material
Stone samples, wall profiles, and cap options laid out with you.
- 03The Logistics
Excavation & footing
Frost-depth trench, compacted base, and poured or block footing per spec.
- 04The Build
Lay & point
Stone or block set with proper batter, weep pipe, and finished mortar joints.
- 05The Standard
Cap & clean
Wall caps, hearth stones, or stoop treads set. Full site clean and warranty issued.
Straight from
our neighbors.
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 GoogleReady to get started? Free on-site estimates across Suffolk County.
(631) 480-3238Answers before
you call.
01How much does a retaining wall cost on Long Island?
How much does a retaining wall cost on Long Island?
Most residential retaining walls in Suffolk County run $60–$150 per face foot depending on height, stone selection, and drainage needs. Segmental block sits at the lower end; natural fieldstone and bluestone-capped walls sit higher. We give a written itemized estimate on-site.
02Do I need a permit for masonry work in Suffolk County?
Do I need a permit for masonry work in Suffolk County?
Retaining walls over 4 ft., structural chimneys, and any work tied to a foundation typically require a permit in Suffolk County towns (Brookhaven, Islip, Southampton, etc.). We handle permitting in-house under License # 58161-H.
03How long does a stone veneer or stoop installation take?
How long does a stone veneer or stoop installation take?
A standard front stoop with stone veneer and bluestone treads runs 4–7 working days. Full-house stone veneer scales with wall square footage — most fronts are 2–3 weeks including scaffolding, drainage, and cure time.
04Will masonry survive Long Island freeze-thaw winters?
Will masonry survive Long Island freeze-thaw winters?
Yes — when it's built correctly. That means footings below the 42" frost line, drainage tile behind every retaining wall, weep pipes, proper mortar mix for the exposure, and freeze-rated stone and brick. Cutting any of those corners is why walls bow, stoops crack, and chimneys spall.
05Do you repair existing chimneys or only build new?
Do you repair existing chimneys or only build new?
Both. We rebuild chimneys above the roofline, replace crowns and caps, tuckpoint historic brick, coordinate flue liner replacement, and address water intrusion. Repair is a large share of our masonry work in Bellport, Patchogue, and the older Sayville and Blue Point neighborhoods.
06What's the difference between natural stone and manufactured veneer?
What's the difference between natural stone and manufactured veneer?
Natural stone (bluestone, fieldstone, granite) is quarried — heavier, more variation, and lasts indefinitely. Manufactured veneer is cast concrete colored to look like stone — lighter, faster to install, and 30–50% less expensive. Both are legitimate; we help you choose based on the house, exposure, and budget.
07How deep do retaining wall footings need to be on Long Island?
How deep do retaining wall footings need to be on Long Island?
Long Island's frost depth is 42 inches. Structural footings for retaining walls, columns, and stoops need to reach below that line to prevent frost heave. We excavate, compact, and pour to spec every time — it's the difference between a wall that holds for 40 years and one that leans in 3.
08Are you licensed and insured?
Are you licensed and insured?
Fully licensed in Suffolk County under License # 58161-H, with general liability and workers' compensation on every job. Certificates of insurance are provided directly to your homeowner's carrier or town on request.
09Do you offer financing on masonry projects?
Do you offer financing on masonry projects?
Yes — approved financing with terms from 60 to 120 months, subject to credit. Most retaining wall, stoop, and stone-veneer projects qualify. Pre-qualification takes about a minute and doesn't affect your credit score.
10What towns do you service?
What towns do you service?
We service Suffolk County's South Shore and central corridor — Medford, Bellport, Patchogue, Holbrook, Ronkonkoma, Sayville, Blue Point, East Patchogue, Bayport, Farmingville, Selden, Center Moriches, and neighboring communities. Call (631) 480-3238 to confirm coverage for your address.
Masonry across
Suffolk County.
Serving Long Island's South Shore and central corridor. Retaining walls, stoops, chimneys, veneer, and repair in the towns below — plus most Brookhaven and Islip neighborhoods in between.
- Masonry in Medford, NY
- Masonry in Bellport, NY
- Masonry in Patchogue, NY
- Masonry in Holbrook, NY
- Masonry in Ronkonkoma, NY
- Masonry in Sayville, NY
- Masonry in Blue Point, NY
- Masonry in East Patchogue, NY
- Masonry in Bayport, NY
- Masonry in Farmingville, NY
- Masonry in Selden, NY
- Masonry in Center Moriches, NY
Stone, brick & block
we install.
Natural stone from regional quarries, brick and block for structural and veneer work, and factory-authorized hardscape systems for wall units and caps.
- Bluestone (Pennsylvania & NY)
- Travertine
- Granite
- Fieldstone
- Cultured Stone Veneer
- Belgian Block
- Clay Brick
- CMU Block




Everything we offer
under Masonry Contractors.
APM O'Neill & Sons
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Licensed & Insured · Free Estimates · Serving Suffolk County, NY







