The Window Source of Upstate SC

Window Installation and Replacement in Upstate SC

The Window Source is your go-to provider of new and replacement windows in Upstate SC. From sliding glass doors to windows, our expert team can help you choose the right option for your home and get them installed in Upstate SC.

The Window Source of Upstate SC

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(864) 923-5548

906a S Broad St.
Clinton, SC 29325

Installing New Windows, Siding & More in

  • Clinton
  • Greenville
  • Spartanburg
  • Five Forks
  • Reidville
  • Powdersville
  • And More!


Entry Doors

Patio Doors


Storm Doors

  • Picture Window Replacement and Installation
  • Awning Window Installation and Repair
  • Casement Window Installation and Repair
  • Double Hung Window Installation Estimates
  • Double Hung Window Repair and Installation
  • New, Heavy Duty Entry Door Replacement and Installation
  • Sliding Patio Door Repair and Installation
  • Whole House Siding Installation
  • Storm Door Repair and Installation

Storm Doors

Sliding Patio Door


Picture Window


Entry Door


Double Hung Window

Awning Window

Casement Window

Double Hung Windows

Get Free Estimate

High-Quality Replacement Windows, Patio Doors, and More in Greenville-Spartanburg

Do you have drafty windows? Doors that don’t close tight? Siding that’s becoming stained? In these situations, The Window Source of Upstate SC is available to ease the problems. We can take care of these issues with new entry doors, replacement windows, or fresh vinyl siding in a color you love. All of our products are the best in the market and professionally installed by experienced technicians. There are lots of reasons to update your windows and doors. Even the need for a new aesthetic could necessitate a custom entry door installation. A patio door may need to be replaced if it no longer stays shut the way it used to. The Window Source of Upstate SC can help in those situations, too.

Gorgeous New Home Windows from The Window Source of Upstate SC

Instead of searching for the right company for “windows near me,” choose the superior window replacement company for Greenville-Spartanburg and the surrounding areas. We’ll install energy-efficient windows, custom windows, new home windows, and replacement windows you can count on. Double-hung windows are a popular choice for those in this area. After you choose a bow window, garden window, awning window, or casement window, consider other improvements your home could use. The Window Source of Upstate South Carolina can provide an entry door that stands out or puts up new vinyl siding if the original is getting dated or damaged. Or install patio doors to get a better glimpse of nature outside.

Find Stunning Replacement Windows Near Me in Greenville-Spartanburg

Having the best window installation service is important to ensure your windows are sealed tight and look great. You can count on The Window Source of Upstate SC to exceed your expectations with excellent replacement doors and windows. Contact us today to learn more and start the process toward a more energy-efficient home.

Real, Local Reviews From Happy Customers


Hands down the best customer service and siding company around our area. Highly recommended!

Emily Wells

Excellent and very professional and exceptional work. Experience with install pleasant from beginning to end with exceptional customer service and affordability for a high quality product. I would highly recommend Kelly and team of Window Source. They made me very proud and happy. The windows look just too lovely.

Ellen Thomas

Awesome job with our windows! Great work and work ethic! Our house looks amazing!

Mary-Wallace Riley

Kelly and his crew are awesome! They have done a beautiful job on my home!

Michele Beach Knighton

pleasant and good service. windows look great and operate great.

Ann M Vassey

Window Source Q&A

Is it worth it to replace my windows?

Is it worth it to replace my windows?

Older windows are notorious for being leaky and inefficient. At The Window Source, we are constantly improving our technology to be more energy efficient. Installing new windows can realize up to an 80% return on investment when you sell your home. Coupled with the savings you’ll see on your energy bill, the cost of window replacement can often be quickly offset.

How do I know when to replace my windows?

How do I know when to replace my windows?

Anytime you notice damage on your windows, it is a good time to have them looked at by an expert. Damage can be caused by water, insects, and father time. Your old windows ar inefficient, unattractive, and can cause damage to your home, call our experts today!

How much will it cost to replace my windows?

How much will it cost to replace my windows?

The best way to determine the cost is to contract a professional and receive an in-home estimate. At The Window Source, our estimates are FREE to you.

What types of payment methods and financing do you offer?

What types of payment methods and financing do you offer?

We offer a variety of payment methods and financing options. Please contact us to hear our options.

What Warranty do you offer?

What Warranty do you offer?

Lifetime Warranty - All Window Source products come with a limited lifetime warranty. You will have peace of mind knowing that you will only make this investment in your home once. Ask your window consultant for details.