Riverhead Building Supply in Greenport is conveniently located at 74500 Main Road (Route 25) in Greenport.
Browse our Design Showroom to see many kitchen vignettes, countertop options, home office designs and much more. In our door and window showroom you can see and operate sliding patio doors, casement and double-hung windows to get inspired for your remodel project.
- 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
- 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
Interested in a design consultation?
Tell us about your project and a designer will reach out to you