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  • Written by
    Max Peterson
  • Fact Checked
  • Updated

Replacement windows can defend your home from leaks and drafts, boost its energy efficiency, and give it additional aesthetic appeal. Local contractors recognize that homeowners would prefer not to pay a high price for window replacement in O'Fallon. They work with innovative materials that don't compromise on durability.

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

Best Financing
DaBella logo
4/5

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

  • Knowledgeable sales representatives
  • American-made products
  • Great financing options

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've compiled this list of companies that specialize in window replacement in O'Fallon.

The This Old House Reviews Team evaluated dozens of window companies in and around O'Fallon. We considered the following metrics to determine the best window replacement providers:

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

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 1259 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 386 reviews


29 Cassens Ct, Fenton, MO 63026

(636) 764-0470

www.championwindow.com/St-Louis

Home Comfort Exteriors

4.7/5

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

Based on 48 reviews


7839 Mexico Rd, St Peters, MO 63376

(636) 928-8900

www.homecomfortexteriors.com

Gateway General Contractors

4.6/5

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

Based on 137 reviews


9031 Veterans Memorial Pkwy, O'Fallon, MO 63366

(636) 515-5868

www.gatewaygeneralcontractorsllc.com
Windows Doors & More LLC Logo

Windows Doors & More LLC

4.6/5

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

Based on 118 reviews


3481 New Town Blvd, St Charles, MO 63301

(636) 724-5291

www.wdsmore.com

Glass Doctor of St. Charles, MO

4.5/5

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

Based on 68 reviews


3910 Old Hwy 94 S Ste 105A, St Charles, MO 63304

(314) 962-4344

glassdoctor.com/st-charles-mo
Jones Home Improvements Logo

Jones Home Improvements

4.5/5

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

Based on 39 reviews


5305 5th St, Cottleville, MO 63304

(636) 317-1977

www.joneshi.com
Floyd Glass & Window Logo

Floyd Glass & Window

4.4/5

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

Based on 175 reviews


30 Triad South Dr, St Peters, MO 63304

(636) 922-3569

www.floydglass.com
Gateway Door and Contracting Logo

Gateway Door and Contracting

4.7/5

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

Based on 264 reviews


3711 Mueller Rd, St Charles, MO 63301

(636) 577-1430

gatewaydoorstl.com
Bath Planet of St. Louis & More Logo

Bath Planet of St. Louis & More

4.4/5

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

Based on 175 reviews


2424 Hwy 94 South Outer Rd, St Charles, MO 63303

(636) 947-0177

www.bathplanetofstl.com

Facts about O'Fallon

  • Annual Energy Efficient Windows Savings:
    $382
  • Average Max Temperature:
    65°F
  • Average Min Temperature:
    46°F
  • Average Daily Sunlight:
    55%
  • Average Annual Snowfall:
    11.3”
  • Average Monthly Precipitation:
    3.41”

How To Choose a Window Company in O'Fallon

Trustworthiness is important when it comes to choosing a window replacement company. However, your chosen company should also match your needs and appreciate your vision. Consider the following factors during your company search:

Window Cost by Type

When it comes to window replacement, value is paramount. Each window you buy should deliver maximum durability at an affordable price point. Choosing economy replacement windows could actually raise your overall cost, since they come with a reduced lifespan and more intensive maintenance needs. The final cost of your window replacement will rely on the particular styles, sizes, and materials you need. Simple double-hung windows deliver great value with their straightforward style and simple mechanisms, while new skylights cost more to prepare for and install. It's recommended to consult a trusted window installer to determine your most suitable options.

This table shows average prices for various window types to give you an idea of what to expect.

Window TypesAverage Cost
Arched$232-$1,424
Awning$336-$935
Bay$774-$5,739
Custom$344-$957
Casement$268-$1,552
Double-hung$125-$808
Egress$230-$573
Glass Block$46-$581
Picture$202-$1,488
Single-hung$91-$1,530
Skylight$115-$1,382
Sliding$264-$1,339
Storm$54-$378
Transom$281-$587

*Our team sourced and verified this cost data by analyzing RSMeans construction estimates, national material and labor costs, and quotes obtained during our in-house consumer focus groups.

Window Material Cost

Replacement window prices also vary based on material. Each option provides different benefits depending on your climate and energy efficiency needs. Fiberglass and vinyl 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$54-$1,530
Composite$553-$1,241
Fiberglass$91-$774
Vinyl$186-$1,722
Wood$276-$1,552

*Our team sourced and verified this cost data by analyzing RSMeans construction estimates, national material and labor costs, and quotes obtained during our in-house consumer focus groups.

Other Window Replacement Costs

Your total cost for new windows will also include warranty fees (if applicable), permit-related costs (if required), and labor. Be sure to discuss each of these aspects with a sales representative before committing to a window company.

Experience and Training

Peruse a company's website and chat with a representative to learn more about its product and service offerings, pricing, and warranties. Many window companies also keep online portfolios that exhibit past projects.

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

Licensing and Credentials

Missouri doesn't mandate window providers to get a state license. Instead, cities and counties set their own licensing requirements. Consult with your city hall to see what regulations they have for window installers, and look for businesses with trusted private accreditations in your own research. A few good places to start include credentials from the AWDI or FGIA.

Types of Windows Offered

No two businesses offer the same window styles and materials. Look for one that's an expert in the type you want for your home.

Also, check the style of window framing materials a company works with. Each material has distinct price points, life spans, and energy performance capabilities. Common materials include fiberglass, composite, vinyl, aluminum and wood.

Customer Feedback

One of the greatest ways to vet a company is to read what other customers have said about their experiences. You can find customer reviews on websites like Trustpilot, the BBB, Yelp, and Google. 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.