Welcome to 21st Century Doors & Windows
Serving All of Orange County, CA

Full Service Door & Window Replacement 

We carry a wide variety of products to fit most every budget!

We Design Full Lines of Vinyl, Wood, Clad and Fiberglass
Doors & Windows

  • Entry Doors & Dutch Doors
  • French Doors, complete with our tented threshold
  • Sliding Patio Doors
  • Wood or Fiberglass Bi-fold Doors
  • Bay Windows, Bow Windows, & Garden Windows
  • Interior Doors & Interior Barn Doors
  • Fixed, Sliding, Casement, & Awning Windows
  • Radius & Eclipse Windows
  • Very Custom Doors & Windows

We Offer Custom Doors, Windows and Entries for Both Replacement and New Construction 

  • Traditional, historical wood or custom designed doors & windows
  • Any Size, Shape, or Color 
  • Exterior Clad with paint grade and stain grade interiors
  • We carry many lines of wood, clad, fiberglass and vinyl products to fit most any budget

21st Century Doors & Windows Request for
Free Design Consultation or Questions


Irvine Spectrum Showroom

10005 Muirlands Blvd., Suite A
Irvine, CA 92618
Corner of Bake & Muirlands
Mon-Fri: 9-6  Sat: 9-5
Sundays and Evenings by Appointment

The cost of replacement windows can be the most effective way to increase the value of your home. Replacement windows in Orange County should be looked at as an investment, and one where you can reasonably expect your home's value to increase. The cost of replacement windows, whether you choose Vinyl, Wood, Fiberglass or Clad can vary greatly depending on the quality and options that you choose. Visit our Product page for more information on the costs of replacement windows, and the pros and cons of the different types of windows available.
Start Your Next Home Improvement
Project With Us...

If you're looking for replacement windows in Orange County, look no further. Choose from wide range of ENERGY STAR replacement windows for your home to replace your old, drafty, broken or just outdated windows and become one of our many satisfied customers. Replacement doors also add value to your home whether it's with an entry door, patio door or french doors. ENERGY STAR qualified products not only save energy and money, but help protect the environment, and reduce energy bills.

From our expert design consultants to our experienced, certified, installation crews or customer service representatives, every member of the 21st Century Doors & Windows family appreciates how important your home is to you. That’s why we’re dedicated to making your experience one that you’ll treasure. Our goal is to continue growing our company. We can only do this by earning your business and providing you the best customer service in the industry.

The 21st Century Experience...Captivating designs...The finest materials...Friendly customer service from start to finish!

Our installers are part of a select group of certified window and door “InstallationMasters™” installers for new construction and remodeling projects.

No matter how much you spend on top notch windows, the windows won’t perform properly if they’re not installed correctly. Poor installation techniques can defeat the advantages of the product and result in air or water leaks, wasted energy, or improper operation.

HERO is the Fastest-Growing Residential Energy Efficiency

Financing Solution in the Country.

        Milgard Windows          Marvin Windows

Remodeling and Home Design