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Start-to-Finish Window Replacement & Patio Door Installation in Darien, CT

Renewal by Andersen window replacement provides Bethel, CT area homeowners with full-service window and door installation! We offer a signature combination of long-term customer care, hassle-free installation, and a custom product for every kind of home. Plus, we offer unmatched quality assurance with a dedicated specialist at each step of the replacement window process.

Why Choose Renewal by Andersen?

Energy efficiency.

Fibrex® material frames are made with a unique combination of materials to withstand the elements better than vinyl windows—and for years to come!

Lasting performance.

Backed by a 20-year warranty, our windows are custom built to last in any weather.

fibrex chart

Unique Style.

With a wide variety of interior and exterior colors, frames, shapes, sizes, glasses, and hardware, you can customize a window to match your home as well as increase its value.


Windows made with Fibrex® material frames showcase more of your view as they seal in large panes of glass with less material needed than vinyl windows.

Your Home. Your Style.

At Renewal by Andersen, we own the entire replacement process from start to finish. That means there’s a window expert specialized in every step—from design, to manufacturing, to installation and beyond!

Every window installation starts with a comprehensive, obligation-free consultation. A Renewal by
Andersen design consultant is familiar with every kind of window replacement, and can help you determine your unique window replacement wants and needs. From there, an install project manager and installation team will help you start enjoying your new window sooner than you think!

Browse our galleries for inspiration, then contact us today to design and install your ideal Darien CT window.

Proudly Serving Darien CT and the Surrounding Region

The Renewal by Andersen team of replacement window experts serves Darien, CT and its nearby region with lasting quality patio door and window installation. We’re dedicated to simplifying every step of the process to deliver lasting, beautiful home improvements—on your schedule, and in any season. Learn more with an in-home consultation today!

  • Darien, CT
  • Greenwich, CT
  • Hartsdale, NY
  • Scarsdale, NY
  • Rye Brook, NY
  • New Canaan, CT
  • Port Chester, NY
  • Norwalk, CT

Bigger, Better Views

Regardless of how design your new home window, our windows give you more—more view, more energy efficiency, and more natural light. Your custom windows are built to last with Fibrex® material frames which hold large panes of glass with twice the strength of vinyl windows. That means your chosen window design keeps your family cool and comfortable for years to come, all while keeping outdoor elements outdoors where they belong.

Ask your design consultant about our custom style and energy efficiency options, then start creating your project plan today!

Hinged and Sliding Glass Patio Doors

Available in a range of colors and styles to match or complement your home windows inside and out, patio doors by Renewal by Andersen protect your home from the outdoors while also offering easy access to them for years to come.

Try a contemporary sliding glass door for a modern look to let in plenty of light, or complement a historic house with a standard French patio door. Every style offers a unique look, but with the same built-in quality to allow easy access to your hard or patio in any season.

Schedule your in-home consultation to start improving your Darien, CT area home today!

Renewal by Andersen Signature Fibrex® Material

Fibrex® frames are completely saturated with color during manufacturing, so you never have to worry about paint cracking or flaking off.
All Renewal by Andersen windows are also guaranteed to function just as well as the day they were installed, so frames will never expand or bow.
Made from 40% recycled wood fiber by weight, Fibrex® provides the strength of wooden windows with the versatility of vinyl.
The unique blend of Fibrex® material allows your windows to be supported by narrow frames for a wide, sleek glass area.

Get in Touch with Us

Call Renewal by Andersen Westchester to schedule your in-home consultation today. Our professionals are committed to simplifying every step of the process, so you can enjoy your new home improvement sooner than you think. Contact us to learn more about our hassle-free, 4-step process.

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