Window & door 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

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Riverhead Building Supply is conveniently located near the train station in Southampton on Powell Avenue

Our window and door showroom is located across the street from our retail store and yard at 25 Powell Avenue.

Both builders and homeowners utilize our Showroom to get inspiration and touch & feel doors and windows from well-known brands like Andersen, Marvin, TruStile, and ThermaTru. Operate large bi-fold and multi-slide doors from multiple brands.

Featured window and door products

ANDERSEN®
WINDOWS AND
DOORS 400 SERIES,
A SERIES

Quality and performance you can trust.

MARVIN® WINDOWS
AND DOORS

Windows and doors built for how you live.

THERMATRU DOORS

Where home begins.

TRUSTILE DOORS

Design that moves you.

INTERIOR & EXTERIOR DOORS

Interior and exterior doors for any project from stock to fully custom.

RBS Pre-Hung Doors

Let us be your Master Carpenter.

Services

  • Delivery service
  • Window and door displays
  • Color and wood species samples
  • Window and door hardware options
  • Brand literature
Learn more about our services

Window & door repair and installation

  • Andersen® service & repair
  • Andersen® installed sales
  • Marvin service & repair
  • Marvin installed sales
  • Storm & screen door installation
  • Window & Door installation and replacements
  • Lift & slide ‘big door’ installation
  • Bilco® basement door installation
  • Screen enclosure installation
  • Garage Doors parts and installation

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