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.

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 – 1:00 pm
Sunday: closed

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