Smithtown Building Supply in Long Island and New York City

Looking for a reliable building supply store in Smithtown that serves Long Island and New York City? 9 Brothers Building Supply has you covered. We stock the materials homeowners and contractors ask for every day, from pavers and base materials to stone veneer, concrete accessories, drainage, and tools. We help homeowners first with clear guidance and fast pickup, and we support contractors with dependable supply and delivery that keeps schedules on track across Long Island and NYC. If you searched building supply store Smithtown or wholesale building supply Smithtown, you are in the right place.

What We Carry

You will find a wide mix of categories ready to go, including Manufactured Stone, Natural Stone, Hardscape, Construction, and Masonry. We carry top names our customers trust, like Cambridge, Nicolock, Techo-Bloc, Watsontown Brick, Glen-Gery, ADA Solutions, Stego, Dutch Quality Stone, StoneCraft, Sika, SmartVent, MAX, Monarch, Kindred Outdoor & Surrounds, MSI, and Husqvarna. From retaining wall systems and polymeric sand to brick, block, rebar, drainage, waterproofing, and saws, we can load you fast so you can get back to the job.

How People Use Smithtown Building Supply in Long Island and New York City

Homeowners come to us to refresh front walks, build a backyard patio, or add a stone veneer to an entry. Contractors rely on our consistent stock for hardscape installs, new construction, and maintenance work. Here is why people choose us in Smithtown, we carry the pavers, edgers, adhesives, and base aggregates that make the job clean and durable, and we keep accessories like geogrid, sealers, and joint sand on hand to finish it right. Real tip, plan your base first, then measure your paver or stone takeoff, and add 5 to 10 percent for cuts and future repairs so you do not run short mid install.

Pickup And Delivery

Pick up at our Brentwood, East Setauket, or Riverhead yards. We stage orders for quick loading, and our team knows how to pack mixed pallets so the first materials off the truck are the first you need on site. We deliver across Long Island and New York City, curbside or jobsite, and we work with you to coordinate drop locations that keep crews moving. Call ahead, tell us your timeline, and we will line up stock and schedule so you are not waiting around.

Get Started

Tell us what you are building, patio, walkway, veneer wall, new entry, or structural work, and we will match the material to your design and budget. Stop by Brentwood, East Setauket, or Riverhead and talk to us. Call ahead and we will stage your order. Ask us about delivery across Long Island and NYC.