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.

WINDOWS & DOORS

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

BUILDING MATERIALS

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

CABINETRY

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

ARCHITECTURAL HARDWARE

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

MOULDING

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

MASONRY

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

TOOLS

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

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.

Check it out

GROW
WITH US

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

Check it out

Virtual Showrooms

Visit our showroom from your device.

Check it out

RED'S ZONE
See our monthly deals on top brands like DeWalt, Bostitch, Makita and more.
Check it out
GROW WITH US
Full-time, part-time, and seasonal positions.
Check it out
VIRTUAL SHOWROOMS
Visit our showroom from your device.
Check it out

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, replica rolex yacht master 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.
GET STARTED

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

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masonry pavers
doors interior exterior
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fasteners hangers
hand tools tapes
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siding pvc
power tools
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decking composite pvc
windows doors patio door
power tools
hardware handle sets
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