Retail store & yard

99 The Plaza, Locust Valley, NY 11560

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

Riverhead Building Supply in Locust Valley is located adjacent to the Locust Valley Long Island Railroad Station and behind The Plaza shops.

This is a full lumber yard with full delivery services and dedicated trucks to drop materials at your jobsite. Visit our hardware store for supplies like fasteners, blades, gardening supplies, and power tools. Homeowners welcome!


  • Delivery service
  • Blade sharpening service
  • Tool repair service
  • Lockset re-key
  • Decking & railing displays
  • Roofing displays & samples
  • Siding displays & samples

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

Contact us and tell us about your project

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