Southampton Store | Riverhead Building Supply

Retail store & yard
in Southampton

40 Powell Avenue, Southampton, NY 11968

631-283-2000

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

Millwork showroom
in Southampton

25 Powell Avenue, Southampton, NY 11968

631-996-3250

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.

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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 Window & Door showroom which features windows, interior and exterior doors, molding, trim, hardware 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!

Our team of experts at Riverhead Building Supply in Southampton serve customers from Hampton Bays, Shinnecock Hills, North Sea, and Water Mill.

Featured products in our Southampton millwork 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


THERMATRU DOORS


KNOB & PULLS DISPLAYS

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


HARDWOOD AND ENGINEERED FLOORING

Services in our Southampton 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

Connect with a millwork specialist in Southampton
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