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

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.

Andersen is the #1 trusted window and door brand.* Andersen 400 Series are the windows contractors trust the most.** Andersen is the #1 brand for window replacement.***

* 2024 Andersen brand surveys of U.S. contractors, builders, architects & homeowners ** 2024 Andersen brand surveys of U.S. contractors. 2024 Andersen brand surveys of U.S. contractors

Visit a design showroom to see

Andersen products and speak with a Specialist

Andersen windows, replacement windows, doors,
parts and accessories

High-quality Andersen products are the perfect choice for any design, function or budget.

  • Series – 400 Series, A-Series, and E-Series
  • Styles — Casement, awning, double hung, gliding, picture, bow, bay, and specialty sizes
  • Materials — Wood, vinyl, composite (Fibrex®), aluminum and fiberglass

Installation services are provided for window replacement and repair

Learn about our many Andersen collections

Visit a showroom and speak with a specialist today

Connect with a millwork specialist