AT YOUR SERVICE FROM FRAME TO FINISH

All you need for residential building

EXPLORE PRODUCTS

WINDOWS & DOORS

Find the best brands for custom doors and windows at Riverhead Building Supply.

CABINETRY

For kitchens, home office, mud room and more visit a Design Showroom.

MOULDING

Choose from a vast selection of stock moulding materials and custom millwork capabilities.

TOOLS

A tool for every job, hand tools, power tools, cordless tools and accessories.

BUILDING MATERIALS

Lumber, drywall, roofing, siding, decking, flooring, masonry and much more.

ARCHITECTURAL HARDWARE

Riverhead Building Supply features quality door hardware from top brands to personalize each project.

MASONRY

Find top brands of pavers, bluestone, and natural stone.

HARDWARE

General hardware store items such as fasteners, connectors, electrical, plumbing, and more.
RED’S ZONE

See our monthly deals on top brands like DeWalt, Bostitch, Makita and more.

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GROW WITH US

Full-time, part-time, and seasonal positions.

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VIRTUAL SHOWROOMS

Visit our showroom from your device.

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Established
in 1948

Our mission has been to consistently provide our customers with professional service, competitive pricing, and quality materials while supporting our local communities and environment.

ABOUT US

Build Smarter. Build Better.

General contractors, custom home builders, remodelers, architects and homeowners throughout Long Island, Connecticut, Massachusetts, and Rhode Island count on us for a broad range of lumber, building materials, and specialty services. From frame to finish, we have the tools, hardware, paints, fine cabinetry, wide plank wood flooring, mouldings and trim that you need. Make the smart choices for your building materials to ensure that every project is a smooth success. Build Smarter. Build Better.

EXPLORE PRODUCTS

Try our exterior Home Visualizer

Perfect online tool for complete exterior remodeling projects; roofing, siding, trim and more. Use this tool with clients to visualize product sections.

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Featured Products

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Store event calendar

See upcoming events in your area and meet brand reps to learn, touch and feel the latest building materials. Bookmark this page and check back often to see what’s happening.

SEE EVENTS

Get connected with the RBS Newsletter

From the latest styles and trends, to the best deals around, the RBS Newsletter will keep you up-to-date on everything you need to know.

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Partner with over 500 brands

trim moulding
masonry pavers
doors interior exterior
lumber engineered wood
lumber engineered wood
exterior doors fiberglass
power tools levels
hand tools tapes
fasteners hangers
masonry cement
masonry pavers
vinyl windows
power tools
windows doors patio doors modern
hardie siding plank board fiber cement
roofing asphalt
door hardware
power tools
siding pvc
decking composite pvc
windows doors patio door
power tools
hardware handle sets
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Riverhead Building Supply

Riverhead Building Supply