9 Brothers Building Supply

9 Brothers Building Supply Your top source for masonry, hardscapes, construction materials, and bulk materials! Offices, Hotels, department Stores, etc.).

State Certified WBE ..We are a family owned and operated building material retailer. We work with homeowners trying to enhance the look of their homes to contractors building superstructures (ie. Our vast line of products includes bricks, blocks, stone, and decorative pavers and also includes steel, wire, lumber and other structural materials. Our staff has 30+ years of industry experience and knowledge and is capable of helping all customers complete the job; no matter how big or small.

A garden wall does two jobs at once. It holds a slope, and it gives a bed an edge you actually want to look at. Borealis...
09/05/2026

A garden wall does two jobs at once. It holds a slope, and it gives a bed an edge you actually want to look at. Borealis from -bloc carries a wood-grain texture, so a low retaining wall reads like a design choice instead of engineering.

Tell us about the slope and we will talk through what a low wall would take.

One long weekend left this summer. However you spend it, we've got the materials to finish the project first, from paver...
09/04/2026

One long weekend left this summer. However you spend it, we've got the materials to finish the project first, from pavers to fire pit kits. Happy Labor Day weekend from all of us at 9 Brothers. Stop by Brentwood, Riverhead, or East Setauket.

When the grade is serious, the wall stops being decorative. G-Force from -bloc is a structural retaining system built fo...
09/02/2026

When the grade is serious, the wall stops being decorative. G-Force from -bloc is a structural retaining system built for the walls that actually hold a hill back, not the ones that trim a flower bed. Spec it where the engineering has to come first.

Ask us whether G-Force suits the grade you are working with.

09/01/2026

Cambridge pavers are built for Long Island backyards. ArmorTec locks in the color so your patio still looks new years down the road, through sun, rain, and everything in between. Pick your style at any of our three yards.

A driveway should do more than lead you home. It should elevate the entire entrance. This modern home features the Ledge...
08/31/2026

A driveway should do more than lead you home. It should elevate the entire entrance.

This modern home features the Ledgestone XL Driveway 3-Pc Design Kit in Onyx/Natural, creating a structured, contemporary driveway that complements the home’s clean architectural lines.

Engineered for strength and durability, Ledgestone XL Driveway pavers are 3 1⁄8" thick, making them an ideal solution for paver driveways designed to handle vehicle traffic while maintaining a refined appearance.

The larger-scale paver pattern adds visual movement and texture, while the deep Onyx/Natural color blend creates striking contrast against the surrounding landscape and natural wood tones of the home.

For homeowners planning a modern paver driveway or driveway upgrade, larger format pavingstones like Ledgestone XL deliver both durability and elevated curb appeal.

As an authorized Cambridge Pavingstones With ArmorTec dealer, we have everything you need to make your outdoor living dreams a reality.

Iconic Fascia Wall by -bloc brings the dimensional character of stacked stone together with the performance of engineere...
08/29/2026

Iconic Fascia Wall by -bloc brings the dimensional character of stacked stone together with the performance of engineered concrete. Made with Klean-Bloc™ technology, it offers enhanced protection against stains and everyday wear while helping preserve its finish with minimal maintenance.

Ask us how the built-in protection changes what a stone-look wall needs from you.

08/28/2026

August is National Water Quality Month, so here is a smart one for the driveway. Permeable pavers are set with open joints that let rainwater filter down into the ground instead of running off into the street. Less standing water, less strain on storm drains, and a driveway that still looks great. Ask us which permeable options fit your project. Stop by Brentwood, Riverhead, or East Setauket.

Fewer joints. Cleaner lines. Faster installs. ⏱️Techo-Bloc's Blu Grande large-format slabs are engineered to make your j...
08/26/2026

Fewer joints. Cleaner lines. Faster installs. ⏱️

Techo-Bloc's Blu Grande large-format slabs are engineered to make your job easier without compromising on finish. The result? A high-end look your clients obsess over, and a timeline that works for your business. Win on both ends. 💰

👉 Stop by our store to see Blu Grande from -Bloc up close.

This Women's Equality Day, we're proud of who we are. A woman-owned business, family-run since 1980, and a certified New...
08/26/2026

This Women's Equality Day, we're proud of who we are. A woman-owned business, family-run since 1980, and a certified New York State Women's Business Enterprise. To every woman building on Long Island, from the office to the jobsite, today is for you. Thank you for building with us.

08/25/2026

Curb appeal starts at the curb. A paver driveway or walkway is the first thing anyone sees, and it is built to carry the load for decades. Interlocking pavers in dozens of styles and blends, in stock at all three 9 Brothers yards. Stop by Brentwood, Riverhead, or East Setauket.

Address

1670 Islip Avenue
Brentwood, NY
11717

Opening Hours

Monday 6:30am - 4pm
Tuesday 6:30am - 4pm
Wednesday 6:30am - 4pm
Thursday 6:30am - 4pm
Friday 6:30am - 4pm
Saturday 6:30am - 2pm

Telephone

+16312733323

Website

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