Skip to main content

«  View All Posts

Window Replacements

How Much Do Fiberglass Windows Cost In 2023?

January 26th, 2023 | 6 min. read

How Much Do Fiberglass Windows Cost In 2023?

Print/Save as PDF

So, you’re interested in replacing your home’s windows with fiberglass windows and want to know how much they cost. 

Fiberglass windows are one of the more affordable window types available. They offer superior durability and longevity and are incredibly low maintenance.

But, just like any other window, they vary in quality and cost. 

At Southwest Exteriors, we offer high-quality fiberglass windows from Marvin. Our windows are meant to be a long-term solution for long-term homeowners. However, we understand that not everyone is looking for a lifelong fiberglass window. 

If you’re looking for fiberglass replacement windows, you want to know how much they will cost. Whether you want the cheapest replacement window or the highest quality one, we have the answers. 


How Much Do Fiberglass Replacement Windows Cost In 2023? (Ranges and Factors)

Fiberglass replacement windows cost anywhere from around $300 to upwards of $1,300 for a standard 3 ft. x 5 ft. window in 2023.

  • If you want the least expensive fiberglass window and don’t need a window that will last long, you can find some fiberglass replacement windows at most Big Box hardware stores, like Home Depot or Lowe’s, for around $300-$500
  • For higher-quality, long-lasting fiberglass replacement windows, expect to pay upwards of $1,500 as a starting cost per window. 

Now, we understand this seems like a wide range for the cost of a window. You may wonder, “How can a fiberglass window cost $300 and $1,500 at the same time?”

With any replacement window, the way it is manufactured directly affects how much it costs. The higher the quality of the window, the more it will cost. 

Lower-quality fiberglass will not perform and last as long as high-quality fiberglass windows. 

To find the best fiberglass window for you, it’s important to know what you want in terms of durability, performance, and longevity. Then, you can find the right window that will meet your needs and understand how much it will cost. 

Let’s look at five other factors that affect the cost of your fiberglass replacement windows so you can understand how much a window replacement project will cost you


Schedule your commitment-free consultation today!


1. Window Style and Size

The style of window you want is one of the largest factors that affect the cost of your fiberglass windows. 

For example, a casement window will be more expensive than a picture window. Garden windows will be more expensive than standard single-hung windows. 

The more complex the functionality of a window is, the more it will cost. Similarly, the larger the window is, the higher the cost. 


2. Window Energy-Efficiency

Windows with energy-efficient properties and added energy upgrades to your replacement windows will add to the cost. The more energy-efficient a window is, the more it costs.

Common additions to make your windows more energy-efficient are Low-E and tinted glass coatings, multiple-paned windows, and gas-filled window panes.


3.  Window Customizations

Any customizations to your new windows will add to the cost of your project. 

For replacement windows, common things you can customize are the interior and exterior frame color, hardware style and finish, grid patterns, and more. Every customization that deviates from the standard window made adds to the cost. 


4. Window Installation

If you choose a high-quality contractor to install your windows, it will cost more for the higher-quality labor. 

The least expensive contractor will never provide the highest quality installation, so it is important to keep your goals in mind to choose the best window replacement contractor for your project. 


5. Window Warranty

Your window warranty protects your new windows from any potential damage or mishaps that may happen in the future. 

The longer your warranty lasts and the more coverage you have, the more it will cost. The less coverage and shorter warranty period equate to a cheaper window. 


Check out this article that outlines 23 tips for home remodeling in 2023! 


Replace Your Windows With The Best Fiberglass Windows For You

Now that you know how much fiberglass replacement windows cost in 2023, you can have realistic expectations for what your window replacement project will cost. 

The most important thing to remember is that cost and quality have a direct relationship when it comes to replacement windows. The highest quality products and services will never be the least expensive. 

Outlining your goals is the first step to creating the right budget for your project. Then, you can find the best fiberglass windows that will meet all your needs.

Before choosing your new fiberglass windows, you need the right information to ensure you are educated to make the best decisions for your project. 


Not sure where to start?

Read this article that outlines what windows are best for San Antonio homes.


Ready to replace your San Antonio windows with high-quality fiberglass windows? Schedule your commitment-free consultation with Southwest Exteriors today and get the look you love coming home to!