Retail store & yard

165 West Montauk Highway, Hampton Bays, NY 11946

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

Riverhead Building Supply in Hampton Bays is conveniently located on Montauk Highway at the junction of Route 24 and Montauk Hwy. across from Macy’s and Panera Bread.

This store features displays of top brands of doors and windows from Andersen, Marvin, ThermaTru and much more. Select cabinetry and door hardware from our spinner displays for any project.

Featured products


  • 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

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