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Stock & Custom Windows & Doors

Windows and Doors for Every Room and Style

In addition to fine cabinetry, Riverhead Building Supply’s Design Showrooms in Long Island and Rhode Island offer custom windows and doors from the most recognized manufacturers in the industry, including Andersen® and Marvin®. Both companies offer stock and custom sizing and a variety of options for grilles, glazing and hardware that will complement any architectural style or personal preference. View our portfolio to envision how new or replacement windows and doors can transform the interior and exterior of your home.

Beautiful windows and doors start with exceptional products. At Riverhead Building Supply Design Showrooms, we carry the most widely known and respected door and window brands in the industry.

We are Long Island and Rhode Island's premier source for stock and custom doors and windows. Contact us or visit one of our showrooms today.