Building Supply in Long Island, NY

Looking for a reliable building supply source in Long Island, NY? We’ve got you covered. 9 Brothers Building Supply stocks what homeowners and contractors actually use, from masonry and hardscape materials to construction and landscape essentials. We serve Long Island and NYC every day, and you can visit our Brentwood, East Setauket, or Riverhead yards to see materials in person, match colors, and load up fast. Whether you’re remodeling a patio, building with brick, or tackling drainage and structural work, our team will point you to the right products and practical solutions.

What We Carry

We keep a deep mix so your project keeps moving.

• Product types: Manufactured stone, natural stone, hardscape materials, construction supply, and masonry essentials.

• Pavers and walls: Cambridge, Nicolock, and Techo-Bloc for patios, walkways, driveways, and retaining walls.

• Brick and block: Watsontown Brick and Glen-Gery with classic and modern looks, plus structural units.

• Stone veneer: Eldorado Stone, Dutch Quality Stone, StoneCraft, and MSI for indoor and outdoor facades and fireplaces.

• Site and structural: Sika for adhesives and mortars, Stego for vapor barriers, SmartVent for flood vents, Monarch for forms and accessories.

• Outdoor living: Kindred Outdoors & Surrounds for fire features and surrounds.

• Tools and equipment: Husqvarna saws and cutting tools, MAX tools for fastening and jobsite efficiency.

We stock what’s moving now, and we can special order what’s not in the yard. Ask us to pull samples so you can compare colors in daylight.

How People Use Building Supply in Long Island, NY

Homeowners come in first. Most start with pavers for a patio or driveway, then add a veneer accent wall or an outdoor fire feature. Hardscape kits from Cambridge, Nicolock, and Techo-Bloc make layout simpler, and our team helps with base prep, edge restraint, and polymeric sand choices. Veneer from Eldorado Stone, Dutch Quality Stone, StoneCraft, or MSI gives you a quick curb appeal upgrade without rebuilding a wall.

Contractors lean on our consistent inventory, fast loading, and brand depth. From Glen-Gery and Watsontown brick to Sika mortars and Stego membranes, we help keep jobs on schedule.

Real tip: for pavers and veneer, order 5 to 10 percent extra to cover cuts and waste. It saves time, and matching dye lots later can be tough. Also, stage base materials near the work area so you are not moving the same pallet twice.

Pickup And Delivery

Swing by Brentwood, East Setauket, or Riverhead. We can load you fast, whether you’re grabbing a few bags or a full pallet run. Need it on site? We offer delivery across Long Island and into NYC, with moffett or boom options depending on the load and site access. Call ahead, and we’ll stage your order so you can get in and out quickly.

Get Started

Tell us your plan, or bring photos and measurements. We’ll match materials, suggest the right base and accessories, and set you up for a clean install. Stop by Brentwood and talk to us, or call ahead and we’ll stage your order. Ask us about delivery.