Decks & Outdoor Structures in Suffolk County, Long Island — APM O'Neill & Sons

Decks and structures
built to code.

Composite, cedar, and IPE decks with engineered footings and code-compliant rails.

Call (631) 480-3238 Get Your Free Estimate

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

Engineered footings

Frost-depth footings, structural posts, and code-compliant beam spans.

Included in every build

№02

Composite or wood

Trex, TimberTech, cedar, and IPE — we build in all four.

Included in every build

№03

Full pavilions

Masonry columns, T&G ceilings, fans, and lighting.

Included in every build

№04

Permit handled

Full permit and inspection coordination in Suffolk County towns.

Included in every build

Why homeowners choose us

Why hire us
for Decks & Outdoor Structures.

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.

Get a Free Estimate (631) 480-3238

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. 1991 · Lic # 58161-H

What clients say · Verified Google reviews

Straight from
our neighbors.

4.9/ 5 average

Rated 4.9 on Google by 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.

Composite vs. wood?

Composite is maintenance-free; wood is warmer underfoot and cheaper up-front.

Do you handle permits?

Yes — permits and inspections handled in-house under license # 58161-H.

Composite or wood?

Composite costs more up front and needs almost no maintenance. Wood is cheaper and wants sealing every few years.

Do you replace old decks?

Yes — demo, haul-away, new footings, and a code-compliant rebuild.

Are permits required?

Most decks over 30" or attached to the house require a permit and inspection. We handle it.

Where we work

Decks & Outdoor Structures across
all of Suffolk County.

Serving Long Island's South Shore and central corridor. Licensed, insured, and locally owned — 35 years building for the towns listed below and every Brookhaven and Islip neighborhood in between.