Design showroom

74500 Main Road, Greenport, NY 11944

631-996-3250
631-996-3199

Hours
Monday – Friday: 8:00 am – 4:00 pm
Saturday: 8:00 am – 12:00 pm
Sunday: closed

Retail store & yard

74500 Main Road, Greenport, NY 11944

631-477-1906
631-477-1038

Hours
Monday – Friday: 7:00 am – 4:00 pm
Saturday: 7:00 am – 3:00 pm
Sunday: 7:00 am – 12:00 pm

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.

Featured products

ANDERSEN®
WINDOWS AND
DOORS 400 SERIES,
A SERIES

MARVIN® WINDOWS
AND DOORS

INTERIOR & EXTERIOR
DOORS

KITCHENS &
COUNTERTOPS

CABINETRY
HARDWARE

HARDWOOD AND
ENGINEERED FLOORING

Services

  • Delivery service
  • Blade sharpening service
  • Tool repair service
  • Lockset re-key
  • Decking & railing displays
  • Roofing displays & samples
  • Siding displays & samples
  • 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
  • Gutter installation
  • Garage Doors parts and installation

Interested in a design consultation?

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

New York

P: 800-378-3650 T: 631-900-3650