20 Best Window Companies in Swansea, IL (2025 Reviews)

Thinking about replacing your windows? We’ve got you covered in this list of the best window installation companies.

We analyzed all the top-rated window companies in Swansea and selected the best 20 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated January 24, 2025

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

A guide on the top window replacement companies in Swansea may not seem like the most captivating article on EcoWatch, but trust us, windows have a more direct impact on your life than you might realize. If your windows are outdated or drafty, you could be losing 25-30% of your house’s heat or cool air right out of them.

That’s also bad news for the environment because the extra energy used by damaged windows increases your carbon footprint.

As windows are so important for your home, selecting the best company for you is a big decision to make. That’s why the EcoWatch team has curated this list of the best window replacement companies, so you can make an informed decision more easily.

Advertisement

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Save 35% + $100 off per window!
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best Window Installation & Replacement Companies in Swansea

The EcoWatch team evaluated several window providers across Swansea to narrow our list down to the best ones. The installers we’ve mentioned in this article passed our review standards for energy-efficient offerings as well as price, local expertise, customer service and beyond.

Window World logo
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World is the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has about 27 years of experience in the window replacement industry. The provider has hundreds of positive reviews from customers on online review websites.

You may want to consider picking Window World if you're interested in a installer that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.

Energy Efficiency of Window World Windows

Window World is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Window World representative when inquiring about services.

How much does Window World cost in Swansea?

Pricing information is not available on Window World’s website since the cost of window installment differs based on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. You can ask for a free quote on its website for more information about the cost.

Renewal by Andersen logo
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has about 27 years of experience in the window replacement industry. The provider has hundreds of positive reviews from customers on online review websites.

You may want to consider picking Andersen if you're interested in a installer that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Andersen representative when inquiring about services.

How much does Renewal by Andersen cost in Swansea?

Pricing information is not available on Andersen’s website since the cost of window installment differs based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. You can ask for a free quote on its website for more information about the cost.

Window Nation logo
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon Limited service area

Window Nation is a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has about 16 years of experience in the window replacement industry. The provider has hundreds of positive reviews from customers on online review websites.

You may want to consider picking Window Nation if you're interested in a installer that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.

Energy Efficiency of Window Nation Windows

Window Nation is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Window Nation representative when inquiring about services.

How much does Window Nation cost in Swansea?

Pricing information is not available on Window Nation’s website since the cost of window installment differs based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. You can ask for a free quote on its website for more information about the cost.

Please note that the companies in this section are national, which means the quality of the service may depend on your local team. We have tried to be unbiased and transparent by including pros and cons for each company.

More Window Companies in Swansea

Renewal by Andersen

Maryland Heights, MO
4.7
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Skylights
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Bay Windows

Website: https://www.renewalbyandersen.com/window-company/733-st-louis-mo/about-us
Address: 2446 Schuetz Rd, Maryland Heights, MO 63043
Phone: (314) 983-9977

Champion Replacement Windows of St. Louis

Fenton, MO
4.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Bay Windows

Website: https://www.championwindow.com/St-Louis/
Address: 29 Cassens Ct, Fenton, MO 63026
Phone: (636) 764-0470

Window Nation

Overland, MO
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Custom Window Designs
  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options

Website: https://www.windownation.com/stlouis-showroom/
Address: 1913 Belt Way Dr, Overland, MO 63114
Phone: (314) 279-8249

Colonial Construction

St. Louis, MO
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation

Website: https://www.colonialstl.com/
Address: 10120 Fite Cir, St. Louis, MO 63123
Phone: (314) 725-6080

Building Envelope Experts

Fenton, MO
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Energy-Efficient Options
  • Service icon Double-Hung
  • Service icon Custom Window Designs

Website: https://www.buildingenv.com/
Address: 1576 Fencorp Dr Suite 160, Fenton, MO 63026
Phone: (314) 310-7878

Chaney Windows And Doors

Maryland Heights, MO
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames
  • Service icon Wood Frames
  • Service icon Bay Windows

Website: http://chaneywindowsanddoors.com/
Address: 80 Weldon Pkwy, Maryland Heights, MO 63043
Phone: (636) 699-6353

Gateway Door and Contracting

St Charles, MO
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation

Website: https://gatewaydoorstl.com/
Address: 3711 Mueller Rd, St Charles, MO 63301
Phone: (636) 577-1430

Windows Doors & More LLC

St Charles, MO
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options

Website: http://www.wdsmore.com/
Address: 3481 New Town Blvd, St Charles, MO 63301
Phone: (636) 724-5291

Home Comfort Exteriors

St Peters, MO
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options

Website: http://www.homecomfortexteriors.com/
Address: 7839 Mexico Rd, St Peters, MO 63376
Phone: (636) 928-8900

Quality Installation

Swansea, IL
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: https://www.qualityinstallation.net/
Address: 1108 N Belt W, Swansea, IL 62226
Phone: (888) 677-6838

Butler Home Improvement

Collinsville, IL
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation

Website: http://www.butlerhomeimprovement.com/
Address: 906 Vandalia St, Collinsville, IL 62234
Phone: (618) 344-7073

Cardinal Contractors

St. Louis, MO
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: https://cardinalcontractors.com/
Address: 453 N Lindbergh Blvd, St. Louis, MO 63141
Phone: (314) 266-4633

STL Windows and Doors

Earth City, MO
4.9
★★★★★
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Double-Hung

Website: https://stlwindowsanddoors.com/
Address: 4200 Shoreline Dr, Earth City, MO 63045
Phone: (314) 277-5952

Gateway General Contractors

O'Fallon, MO
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation

Website: https://www.gatewaygeneralcontractorsllc.com/
Address: 9031 Veterans Memorial Pkwy, O'Fallon, MO 63366
Phone: (636) 515-5868

L&D Wilson's Siding & Roofing Inc

Lebanon, IL
4.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Window Repair
  • Service icon Energy-Efficient Options

Website: https://www.wilsonsidinginc.com/
Address: 502 S Fritz St, Lebanon, IL 62254
Phone: (618) 632-2389

Mills Window & Door Showroom

Fenton, MO
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: http://www.millswindow.com/
Address: 1860 Fenpark Dr, Fenton, MO 63026
Phone: (314) 429-7000

Jacob Sunrooms, Exteriors & Baths

Fenton, MO
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Glass Showers
  • Service icon Vinyl Frames
  • Service icon Fiberglass Frames
  • Service icon Window Replacement/Installation

Website: https://www.jacobsunroom.com/
Address: 1707 Gilsinn Ln, Fenton, MO 63026
Phone: (314) 241-3751

Lyons Glass Company

Alton, IL
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Tempered Glass
  • Service icon Glass Doors
  • Service icon Glass Repair
  • Service icon Glass Showers
  • Service icon Mirrors
  • Service icon Window Replacement/Installation

Website: http://www.lyonsglasscompany.com/
Address: 2400 Belle St, Alton, IL 62002
Phone: (618) 462-2731

Glass Doctor of St. Charles, MO

St Charles, MO
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Repair
  • Service icon Glass Showers
  • Service icon Tempered Glass
  • Service icon Energy-Efficient Options
  • Service icon Custom Glass
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Mirrors
  • Service icon Window Repair

Website: https://glassdoctor.com/st-charles-mo/
Address: 3910 Old Hwy 94 S Ste 105A, St Charles, MO 63304
Phone: (314) 962-4344

Jones Home Improvements

Cottleville, MO
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation

Website: http://www.joneshi.com/
Address: 5305 5th St, Cottleville, MO 63304
Phone: (636) 317-1977
Swansea Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Swansea, IL using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.

How Installing Energy-Efficient Windows in Swansea Saves You Money

When you switch to energy-efficient windows, you may see a few perks, including:

  • Protect your valuables from fading: When you switch to energy-efficient windows that have low-emissivity coatings, your floors, carpets and furniture will fade less due to their ability to filter out damaging UV rays.
  • Save money on energy bills: Since energy-efficient windows decrease the amount of energy needed to heat or cool your home, the switch can help you save about $316 annually on your energy bills in Swansea.
  • Protect your investment: If your home is on the older side, your windows are most likely in need of replacement. Updating your windows can improve the insulation in your home and also help increase the value of your property if you decide to sell.
  • Decrease your carbon footprint: In Swansea, you can reduce your indirect greenhouse gas emissions by about 642 pounds per year once you upgrade to energy-efficient windows.

Estimated Cost of Window Replacement in Swansea

Let’s go over the cost of installing new windows and the kinds of services you may need for your home.

How Much Do New Windows Cost?

The typical cost to install one window is about $600 but can range from $200 to $1,200. These figures vary based on specific characteristics of your installation, including type, size, number of windows, the location of your home, material and more.

Bear in mind that energy-efficient windows may cost more upfront, but Energy Star predicts the upgrade will save you between $101 and $583 per year when you replace single-pane windows and between $27 and $197 per year when replacing double-pane, clear glass windows. Your savings will vary based on your local climate, energy rates and individual home characteristics.

Requesting free quotes from multiple providers is the best way to find out which one will work best for your budget.

What Services do Window Installers Offer?

In regard to window installations, in general there are two types that your installer will have: full-frame and pocket installations.

A full-frame installation replaces the full window, such as the windowsill, frame, trim and the window panes. Because this kind of installation is more involved, it will be more expensive than a pocket installation. Pocket installations are simpler and won’t cost as much because they involve simply replacing the window within its existing frame. But if the frame has any damage, you may have to get a full-frame installation instead.

Your window replacement company should be able to help you figure out what’s best for your needs. In Swansea, the decision will mostly depend on how old your home is and if there’s any moisture damage. Wood can decay if not maintained properly over the years, so it’s good to have a professional check your frames and window sills.

Advertisement

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Save 35% + $100 off per window!
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

How We Choose the Best Window Installers in Swansea

In our search to find the most reliable, eco-friendly window installers in Swansea, the EcoWatch team examined many companies before landing on these. Along with energy efficiency, we reviewed window companies all across the state and ranked them using the following methodology:

Service Area

This one is self-explanatory, but we’ve chosen to highlight window installation companies that serve the Swansea area so you can find the right window installation company near you.

Work Quality

We’re certain that you’re looking for a company to do a great job installing windows. We’ve vetted each installer in our guide to make sure its contractors are well-qualified and that the company has gotten a lot of positive customer feedback to vouch for its service.

Customer Reviews

Another self-explanatory yet very important review factor is customer feedback. If most customers don’t have positive things to say about their service from a certain window installation company, it won’t be featured on EcoWatch.

Cost

This one is a give-and-take: as with other services, cheap window companies are not going to provide the most quality service. Still, we want to make sure we’re highlighting companies that offer a wide range of price and financing options so they’re accessible to most homeowners.

Warranty

Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Because of Swansea’s climate, homeowners will want to mitigate water damage, rot and low efficiency. We factored in local experience to reflect the ability of Swansea window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.

Swansea, IL Window Replacement FAQs

How much should window installation cost?

The average cost of replacing one window ranges from $450 to $650. There are a variety of factors that affect how much it costs, which include how energy-efficient the windows are, your property’s location, styles and sizes of windows, local labor costs, the number of windows and the materials used in designing the windows.

Which kind of window is the best?

A window’s energy efficiency is affected by several factors, including the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient since they are certified by the U.S. Department of Energy.

When do I have to use a window installation company?

Unless you’re handy and have the tools needed to replace your own windows, we recommend hiring the pros. The process of installing windows is quite involved and can take anywhere from four to six hours for one window. Although it’s tempting to try to save some money by doing it yourself, hiring a professional is a faster, more efficient and much safer option.

When is the best time of year to replace windows?

Replacement windows can be installed during any season, but warmer weather is typically better. Regardless of when you install them, the contractors will take steps to ensure that too much hot or cold air doesn’t get into your home, so the temperature outside doesn’t necessarily matter that much. What’s more important than the temperature is that the weather should be dry.

How long does it generally take to install windows?

Since the average installation time is 30 minutes per window, around 16 windows can be installed during an 8-hour work day.