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Windows & Patio Doors

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Earn up to $750 cash back when you purchase
Andersen® Windows from Riverhead Building Supply

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Purchase IKO Cambridge Shingles — Get a TV!

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Your Best Source for Building Materials and Lumber

Riverhead Building Supply -
Long Island and Rhode Island's Choice For Building Supplies For Over 65 Years

Ensure your projects are done right every time with exceptional building materials and services from Riverhead Building Supply. Our quality building supplies, pre-job planning services, installation teams and more, help you enjoy peace of mind. You can be confident that your job is being completed with only the best products and by some of the most experienced professionals in the industry.

Builders, contractors, architects and homeowners throughout Long Island and Rhode Island count on us for a broad range of building supply products and specialty services. From lumber, tools, hardware and paint to fine cabinetry, flooring, kitchen design, windows, estimating and custom molding, we have the premium building materials and service selection you need to make every project a smooth success.

Riverhead Building Supply ShowroomRiverhead Building Supply Kitchen Showroom DisplayGet Kitchen Remodeling Ideas at Riverhead Building Supply's ShowroomsSee the kitchen Displays at Riverhead Building Supply's Showrooms on Long Island and Rhode Island
Fine cabinetry, windows, doors, and flooring. Discover everything you are looking for at the Riverhead Building Supply Showroom. Our full-sized showroom displays will project how your new kitchen will look. Riverhead Building Supply Showroom design consultants will work closely with you incorporating you and your client's vision into the final plan. We make sure that everything fits just right, so your new kitchen is perfect.
Heritage Wide Plank Flooring Available at Riverhead Building Supplyheritage-wide-plank-flooring-living-room.jpgHeritage Wide Plank Flooring Checkered Kitchen DisplayHeritage Wide Plank Flooring Hallway Display
Enhance the beauty of your home or project with Riverhead Building Supply's Heritage Wide Plank Flooring. Characterized by understated elegance and quality craftsmanship, our unique floor designs and finishes have a heritage and history all their own and will turn any room into an architectural centerpiece.
Custom Millwork from Riverhead Building SupplyRiverhead Building Supply's Custom Millwork Shop in Calverton, NYInside of Riverhead Building Supply's Custom Molding and Millwork ShopRiverhead Building Supply Provides Custom Moldings and Other Milled Products
Riverhead Building Supply has its own custom millwork shop. We produce molding, windows, doors and Heritage Wide Plank Flooring at our state-of-the-art manufacturing plant in Calverton, Long Island using streamlined processes that ultimately benefit you, our customer, with more choices and faster turnaround.
Ecobuilding Materials Available at Riverhead Building SupplyRiverhead Building Supply's Ecobuilding Products Feature Green TechnologyEcobuilding Products from Riverhead Building Supply are Green and Eco-FriendlySupport the Environment by Using Riverhead Building Supply's Ecobuilding Products
When You Need to Build Green, Think Red. Riverhead Red.
Riverhead Building Supply is committed to offering the highest quality of building materials, and that includes products deemed beneficial for our environment. We have a number of products that feature "green" technology and meet specific eco-friendly requirements.

For our complete selection of offerings, please visit our products and services pages.

For quality building materials, supplies and services, look to Riverhead Building Supply. Contact us or call us today at 1-800-378-3650 (New York), 1-800-874-9500 (Rhode Island). Find out how easy it is to Build Smarter. Build Better.