Greenport Store | Riverhead Building Supply

Retail Store & Yard
in Greenport

74500 Main Road, Greenport, NY 11944

Hours
Monday – Friday: 6:30 am – 4:00 pm
Saturday: 7:00 am – 1:00 pm
Sunday: closed

Design showroom
in Greenport

74500 Main Road, Suite 1, Greenport, NY 11944

 631-996-3250

Hours
Monday – Friday: 8:00 am – 4:00 pm
Saturday: 8:00 am – 1:00 pm
Sunday: closed

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Riverhead Building Supply in Greenport is conveniently located at 74500 Main Road (Route 25) in Greenport.

Browse our Design Showroom to see many kitchen vignettes, countertop options, home office designs and much more. In our door and window showroom you can see and operate sliding patio doors, casement and double-hung windows to get inspired for your remodel project.
This location is a full service lumber yard and hardware store as well.

We serve the entire north fork of Long Island from Orient Point, Shelter Island, Southold, Peconic, Cutchogue, and Laurel.

Featured products in our Greenport design showroom

Andersen windows and patio doors featured in a coastal-inspired living space


ANDERSEN®
WINDOWS AND
DOORS 400 SERIES,
A SERIES

Marvin windows and doors featured in a bright lakeside room with expansive views and folding patio doors


MARVIN® WINDOWS
AND DOORS

Interior and exterior doors creating a seamless transition between indoor and outdoor living spaces


INTERIOR & EXTERIOR
DOORS

Kitchen cabinetry and hardware featured in a contemporary kitchen with painted cabinets and decorative hardware


KITCHENS &
COUNTERTOPS

Cabinetry and door hardware featured in a custom kitchen with decorative cabinet pulls and interior doors


CABINETRY
HARDWARE

Birch hardwood flooring featuring subtle grain patterns and warm natural wood tones


HARDWOOD AND ENGINEERED FLOORING

Services in our Greenport store

  • Delivery service
  • Blade sharpening service
  • Tool repair service
  • Lockset re-key
  • Decking & railing displays
  • Roofing displays & samples
  • Siding displays & samples
  • Peconic Bay & other brands flooring displays
  • Paint & stain mixing color matching paint only

Installation services

  • Andersen® service & repair
  • Marvin service & repair
  • Storm & screen door installation
  • Window & Door installation and replacements
  • Lift & slide ‘big door’ installation
  • Bilco® basement door installation
  • Screen enclosure installation
  • Kitchen and bath cabinetry installation
  • Gutter installation

Interested in a design consultation in or around Greenport?

Tell us about your project and a designer will reach out to you
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