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  • Written by
    Max Peterson
  • Fact Checked
  • Updated

You might be installing replacement windows to improve your home's exterior facade, use less energy, or protect your home from the rain and gusty winds. If your windows are getting old or showing signs of damage, it's likely time to get new ones. Working with a licensed window company will help you get the most satisfactory results and help you steer clear of costly mistakes from attempting to handle the job yourself.

Top Pick
Renewal by Andersen logo
4.7/5

Ratings are based on our detailed proprietary methodology and review standards.

  • Full-service installation
  • Large window selection
  • Nearly 30 years of experience

Buy One Window, Get One 40% OFF

Best Financing
Champion logo
4.4/5

Ratings are based on our detailed proprietary methodology and review standards.

  • Full-service installation
  • In-house, U.S.-made products
  • More than 70 years of experience

Save 35% + $100 off per window!

Most Customizable
Power Home logo
4.3/5

Ratings are based on our detailed proprietary methodology and review standards.

  • Full-service remodeling
  • 96% satisfaction rate
  • More than 30 years of experience

Next-Day Appointments Available

10 Best Window Replacement Companies in O'Fallon

Brands are algorithmically curated from a database of local service providers near you. We require a minimum number of Google reviews and average ratings for provider inclusion.

We recommend working with one of these leading professionals for your window replacement project in O'Fallon.

The This Old House Reviews Team evaluated scores of window installers in and around O'Fallon. We looked at the following metrics to select the best window replacement installers:

  • Energy-efficiency guarantees
  • Product quality
  • Services and warranties
  • Customer reviews and recommendations
  • Professional experience and licensure

Featured Partner
Renewal by Andersen Logo
Top Rated

Renewal by Andersen

4.9/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 1129 reviews


2446 Schuetz Rd, Maryland Heights, MO 63043

(314) 983-9977

www.renewalbyandersen.com/window-comp...
Featured Partner
Champion Replacement Windows of St. Louis Logo
Top Rated

Champion Replacement Windows of St. Louis

4.5/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 369 reviews


29 Cassens Ct, Fenton, MO 63026

(636) 764-0470

www.championwindow.com/St-Louis

Quality Installation

4.6/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 39 reviews


1108 N Belt W, Swansea, IL 62226

(888) 677-6838

www.qualityinstallation.net
Butler Home Improvement Logo

Butler Home Improvement

4.6/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 54 reviews


906 Vandalia St, Collinsville, IL 62234

(618) 344-7073

www.butlerhomeimprovement.com

Jacob Sunrooms, Exteriors & Baths

4.4/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 133 reviews


9723 IL-161, Fairview Heights, IL 62208

(618) 397-4391

www.jacobsunroom.com

L&D Wilson's Siding & Roofing Inc

4.4/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 19 reviews


502 S Fritz St, Lebanon, IL 62254

(618) 632-2389

www.wilsonsidinginc.com
Windoor - Unlimited Logo

Windoor - Unlimited

4.4/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 24 reviews


200 Collinsville Rd, Troy, IL 62294

(618) 505-7502

www.windoor-unlimited.com

Gravois Glass

4.4/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 150 reviews


6825 Gravois Ave, St. Louis, MO 63116

(314) 352-2200

www.gravoisglass.net

Empire Supply Co

4.5/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 46 reviews


7286 Manchester Rd, St. Louis, MO 63143

(314) 645-2633

empiresupplystl.com
Glass Doctor of Greater St. Louis Logo

Glass Doctor of Greater St. Louis

5/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 895 reviews


9400 Manchester Rd, St. Louis, MO 63119

(314) 962-4344

glassdoctor.com/st-louis

Facts about O'Fallon

  • Annual Energy Efficient Windows Savings:
    $316
  • Average Max Temperature:
    65°F
  • Average Min Temperature:
    47°F
  • Average Daily Sunlight:
    55%
  • Average Annual Snowfall:
    11.5”
  • Average Monthly Precipitation:
    3.48”

How To Choose a Window Company in O'Fallon

Each window provider has different offerings and approaches. To simplify the company search, keep these factors in mind:

Window Cost by Type

When it comes to window replacement, value is key. Each window you buy should offer top-notch durability at a reasonable price point. Although high-quality windows may come with a higher initial price tag, they often provide better long-term value due to their increased lifespan. The style, material, and size of your replacement windows are the most significant factors in your final cost. Simple double-hung windows deliver great value with their straightforward style and simple mechanisms, while a sweeping, custom-size picture window will cost more. It's wise to speak with a reliable window installer to determine your most suitable options.

In this table, you can find cost data for the most common residential window types to determine how much you might pay.

Window TypesAverage Cost
Arched$194-$1,188
Awning$280-$780
Bay$646-$4,789
Custom$287-$798
Casement$224-$1,295
Double-hung$104-$674
Egress$192-$478
Glass Block$38-$485
Picture$168-$1,242
Single-hung$76-$1,277
Skylight$96-$1,153
Sliding$220-$1,118
Storm$45-$316
Transom$234-$490

Window Material Cost

Replacement window prices also vary based on material. Each option gives you different benefits depending on your climate and energy-saving goals. Vinyl and fiberglass are readily-available materials, so they tend to cost less. Likewise, composites and aluminum look sleek and stay strong against the elements, so they tend to cost more.

Window TypesAverage Cost
Aluminum$45-$1,277
Composite$461-$1,036
Fiberglass$76-$646
Vinyl$155-$1,437
Wood$231-$1,295

Other Window Replacement Costs

Your total cost for window replacement will also include warranty fees (if applicable), permit application fees, and labor. Ensure that you discuss each of these elements with a sales representative before committing to a window company.

Experience and Training

Browse a company's website and talk to a representative to learn more about its product and service offerings, pricing, and warranties. Many window companies also keep online galleries that highlight past projects.

Ensure that the company specializes in window replacement. The more dedicated instruction its staff has, and the longer it has been in operation, the more likely it will provide high-quality service.

Licensing and Credentials

Illinois doesn't issue state contracting licenses to window installers, but towns in the Land of Lincoln might have their own requirements for companies to follow. In Chicago proper, window installers must have a Class D or E license and submit copies of their business filings for the public record. Outside the Windy City, licensing requirements are not uniform.

Types of Windows Offered

There are a variety of replacement window types you can choose from, and it's important to find a company that focuses on installing the ones you want. Look on a company's website and reviews for any of these types:

Equally important to your desired windows' shape is their framing. Ask your window provider if it offers the frame material you want, such as aluminum, composite, vinyl, fiberglass, or wood.

Customer Feedback

Reading other customers' stories is a great way to screen different window replacement companies. You can find customer reviews on websites like Trustpilot, Google, the BBB, and Yelp. Referrals can also help you in your company search. Ask each company you're interested in for a list of references, and talk to family and friends about who they use for window installations.

Frequently Asked Questions about Window Replacement in O'Fallon

More Window Resources

National Windows Company Ranking Methodology

Sources

Energy Star

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

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