Retail store & yard

40 Powell Avenue, Southampton, NY 11968

631-283-2000
631-283-2270

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

Design showroom

25 Powell Avenue, Southampton, NY 11968

631-996-3250
631-287-9503

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

This location does not have Kitchens displayed.

Riverhead Building Supply is conveniently located near
the train station in Southampton at 40 Powell Avenue.

Across the street at 25 Powell Avenue is our Door & Window Showroom which features windows, doors, molding, trim and more. Both builders and homeowners utilize our Showroom to get inspiration and touch & feel doors and windows from well-known brands like Andersen, Marvin, and ThermaTru. Stop by for your everyday hardware needs from hoses to power tools. Homeowners welcome!

Featured products

ANDERSEN®
WINDOWS AND
DOORS 400 SERIES,
A SERIES

MARVIN® WINDOWS
AND DOORS

THERMATRU DOORS

KNOB & PULLS DISPLAYS

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

Connect with a
millwork specialist

New York

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


Riverhead Building Supply

Riverhead Building Supply