Riverhead Building Supply is an authorized dealer of Andersen windows and doors

Andersen® is the #1 trusted and recommended window & door brand.* Andersen® time-tested 400 Series products offer beauty, performance and durability. That’s why for over 22 years running, builders have used Andersen® windows more than any other brand.**

Andersen is the largest window and door manufacturer in North America and is the brand pros trust for dependable, high-performing windows, replacement windows, doors, parts, and accessories. We carry a full line of Andersen products including the 400 Series, A Series, and others.

* 2022 Andersen brand surveys of U.S. contractors, builders & architects. ** Hanley Wood Builder Brand Use Study 1998-2020, Windows – Wood & Clad-Wood Category.

Visit a design showroom to see
Andersen products and speak with a Specialist

Installation services are provided for window replacement and repair

Browse our stock door & window items.

Connect with a millwork specialist

Connect with a millwork specialist

Ph: 800-378-3650 Txt: 631-900-3650