26 Best Window Replacement Companies in Alton, IL (2023 Reviews)
Window Companies Near Me

Are you thinking about upgrading your windows? Our list of the best window installation companies can help you pick the right one for you.

We analyzed all the top window installers in Alton and selected the top 26 based on:

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

By EcoWatch Local Advisors

Updated May 04, 2023

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 installation companies in Alton may not seem like the most interesting article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might realize. Traditional, outdated windows could lead to spending more on energy bills during the winter or summer months.

Thankfully, saving you money with efficient windows also helps our goals of conserving energy and the resources it takes to produce it.

As windows are so important for your home, choosing 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 installation companies, so you can more easily make an informed decision.

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Award-winning company
  • Great industry reputation
  • Member of US Green Building Council
  • More expensive than competition

Best Affordability

Window World

★★★★★
4.5

  • Great industry reputation
  • Lifetime warranty
  • EnergyStar Partner
  • Quality of service will depend on your area

Best for Residential Windows

Window Nation

★★★★★
4

  • Custom designs
  • Wide variety of products and services
  • Manufactures products in-house
  • Installation not covered by warranty

Best Window Replacement Companies in Alton

The EcoWatch Reviews team examined dozens of installers in Alton to find the best window installation companies for our readers. The providers in this article passed our review standards for energy-efficient offerings as well as price, customer service, local expertise and beyond.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Award-winning company
  • Pros icon Great industry reputation
  • Pros icon Member of US Green Building Council
Cons:
  • 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 around 27 years of experience in the industry, and it currently provides services to nearly every state except Mississippi and West Virginia. Its reputation is backed by hundreds of positive reviews from customers online.

It 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

A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019. Not all of Andersen's windows are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.

How much does Renewal by Andersen cost in Alton?

Andersen does not mention prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to know for sure is to ask for a free quote from the company.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

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

Window World offers windows expertise in Alton. This window installation company has been operating since 1995 and currently serves 200 locations nationwide. The provider has a lot of glowing reviews from customers on online review websites.

Window World may be the company for you if you want one 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 has some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality Energy Star windows when inquiring. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.

How much does Window World cost in Alton?

Prices aren't listed on Window World's website, but it's known for offering some of the most affordable window installations around. Receiving a free quote on its website is the best way to get more accurate information.

Window Nation logo
FAST QUOTE
as little as 30 seconds
Best for Residential Windows

Window Nation

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

Window Nation offers the best residential windows in Alton. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has been in the window installation industry for about 16 years.

It gives customers the opportunity to view products and to speak to a representative in person in its showrooms.

Energy Efficiency of Window Nation Windows

There are a wide range of window types that Window Nation offers, some of which are Energy Star products. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.

How much does Window Nation cost in Alton?

Window Nation doesn't have any prices listed on its website, but 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 inquire about a free quote on its website for more information about the cost.

Universal Windows Direct logo
FAST QUOTE
as little as 30 seconds
Best Warranty

Universal Windows Direct

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 2002
Pros:
  • Pros icon Makes charitable contributions
  • Pros icon Manufactures products in-house
  • Pros icon Wide variety of products and services
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Limited service area
  • Pros icon Some installations carried out by third-party contractors
  • Pros icon Quality of service will depend on your area

Universal Windows Direct is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has been in the window installation industry for around 20 years. The provider has a lot of positive reviews from customers online.

Universal may be the company for you if you're interested in one that has an industry-leading warranty covering products, parts and workmanship for life.

Energy Efficiency of Universal Windows Direct Windows

There are a wide variety of window types that Universal Windows Direct offers, some of which are Energy Star products. The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products.

How much does Universal Windows Direct cost in Alton?

Prices are not available on Universal's website, as the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. If you'd like more accurate pricing information, you can receive a quote on the company's website.

We've recommended installers with good reputations, but keep in mind some national companies have independently owned locations in Alton, so your service may depend on your local crew. We have tried to be unbiased and transparent by listing pros and cons for every company reviewed.

More Window Replacement Companies in Alton

Penny Window

St. Louis, MO
4.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Sliding Glass
  • Service icon Tempered Glass
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Double-Hung
  • Service icon Aluminum Window Frames
  • Service icon Energy-Efficient Options
  • Service icon Fast Delivery
  • Service icon Commercial Windows

Website: https://pennywindowstl.com/
Address: 9910 Halls Ferry Road, St. Louis, MO 63136
Phone: (314) 867-4355

The Blind Broker of St. Louis

St Peters, MO
4.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Award-Winning
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Full-Service Installations
  • Service icon Commercial Windows
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames

Website: https://theblindbrokerstl.com/
Address: 2907 N St Peters Pkwy, St Peters, MO 63376
Phone: (314) 866-8840

Window World of St. Louis

Earth City, MO
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Free assessment

Services Offered

  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Bay Windows

Website: https://www.windowworldstlouis.com/
Address: 3600 Rider Trail S, Earth City, MO 63045
Phone: (314) 993-1800

Chaney Windows And Doors

Maryland Heights, MO
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Award-Winning

Services Offered

  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Stained Glass
  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Bay Windows

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

Two Blind Guys

Des Peres, MO
4.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Stained Glass
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows
  • Service icon Bay Windows
  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Sliding Glass

Website: https://www.twoblindguys.com/
Address: 1066 N Ballas Rd, Des Peres, MO 63131
Phone: (314) 698-2090

Window Nation

Overland, MO
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Award-Winning

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Double-Hung
  • Service icon Sliding Glass
  • Service icon Bay Windows
  • Service icon Stained Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Glass Showers

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

Empire Supply Co

St. Louis, MO
4.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Energy-Efficient Options
  • Service icon Glass Showers
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Commercial Windows
  • Service icon Tempered Glass
  • Service icon Sliding Glass

Website: http://empiresupplystl.com/
Address: 7286 Manchester Rd, St. Louis, MO 63143
Phone: (314) 645-2633

Masonry & Glass Systems Inc

St. Louis, MO
4.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Award-Winning
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Stained Glass
  • Service icon Glass Showers
  • Service icon Double-Hung
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Bay Windows

Website: https://www.masonryglass.com/
Address: 1503 S Kingshighway Blvd, St. Louis, MO 63110
Phone: (314) 535-6515

Triton Exteriors

St. Louis, MO
4.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Award-Winning
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

  • Service icon Double-Hung
  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Commercial Windows

Website: https://triton-stl.com/
Address: 7526 Big Bend Blvd, St. Louis, MO 63119
Phone: (314) 717-1159

Sears Window Replacement

Bridgeton, MO
4.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Award-Winning
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Sliding Glass
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Energy-Efficient Options
  • Service icon Stained Glass

Website: https://www.searshomeservices.com/locations/hi/window-replacement/mo/bridgeton
Address: 12930 Hollenberg Dr, Bridgeton, MO 63044
Phone: (314) 325-8649

Mr. Handyman of Central St. Louis County

Maryland Heights, MO
4.0
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Award-Winning
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Stained Glass
  • Service icon Glass Showers

Website: https://www.mrhandyman.com/st-louis-county/
Address: 9 Midland Ave Apt D, Maryland Heights, MO 63043
Phone: (314) 266-0360

Home Services at The Home Depot

Brentwood, MO
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Fast Delivery
  • Service icon Stained Glass
  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Sliding Glass
  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Bay Windows

Website: https://www.homedepot.com/l/Hanley-Rd-40/MO/Brentwood/63144/3002/services
Address: 1603 S Hanley Rd, Brentwood, MO 63144
Phone: (314) 279-3869

STL Windows and Doors

St. Louis, MO
3.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

  • Service icon Bay Windows
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Commercial Windows
  • Service icon Residential Windows

Website: http://stlwindowanddoors.com/
Address: 12150 Lackland Rd, St. Louis, MO 63146
Phone: (314) 277-5952

Glass & More Inc. Low price glass repair!

Belleville, IL
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Double-Hung
  • Service icon Full-Service Installations
  • Service icon Commercial Windows
  • Service icon Glass Showers
  • Service icon Residential Windows

Website: http://www.jimsglassandmore.com/
Address: 5400 N Belt W, Belleville, IL 62226
Phone: (618) 222-1197

STL Design and Build

Maryland Heights, MO
3.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Award-Winning

Services Offered

  • Service icon Residential Windows
  • Service icon Double-Hung
  • Service icon Fast Delivery
  • Service icon Glass Showers
  • Service icon Custom Window Designs

Website: https://www.stldesignandbuild.com/
Address: 11088 Millpark Dr Apt 140, Maryland Heights, MO 63043
Phone: (314) 736-5800

Kirkwood Glass Co

Kirkwood, MO
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Tempered Glass
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Fast Delivery
  • Service icon Sliding Glass
  • Service icon Full-Service Installations
  • Service icon Residential Windows
  • Service icon Glass Showers

Website: http://www.kirkwoodglass.com/
Address: 300 S Kirkwood Rd, Kirkwood, MO 63122
Phone: (314) 966-0272

Glass Doctor of Greater St. Louis

St. Louis, MO
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Double-Hung
  • Service icon Tempered Glass

Website: https://glassdoctor.com/st-louis/
Address: 9400 Manchester Rd, St. Louis, MO 63119
Phone: (314) 962-4344

Mr. Handyman of St. Charles Co. and Chesterfield Valley

St Peters, MO
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs

Website: https://www.mrhandyman.com/st-charles-co-chesterfield-valley/
Address: 4051 N St Peters Pkwy Unit 4053C, St Peters, MO 63304
Phone: (636) 888-0017

Viviano Windows & Door

Webster Groves, MO
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Stained Glass
  • Service icon Energy-Efficient Options
  • Service icon Glass Showers

Website: https://viviano-inc.com/
Address: 7530 Watson Rd, Webster Groves, MO 63119
Phone: (314) 353-8350

Hyperion Glass Company

St. Louis, MO
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: http://hyperionglassco.com/
Address: 2357 Grissom Dr, St. Louis, MO 63146
Phone: (314) 920-9417

Blind Ambition STL

St Charles, MO
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Full-Service Installations
  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows
  • Service icon Residential Windows

Website: http://www.blindambitionstl.com/
Address: 3329-1 Domain St, St Charles, MO 63301
Phone: (636) 579-4065

Window Doors & More LLC

St Charles, MO
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Award-Winning
  • Pros icon Price Transparency

Services Offered

  • Service icon Residential Windows
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Fast Delivery

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

House Doctors of St Louis - Handyman Services (previously Andy OnCall Handyman Services)

St Peters, MO
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Glass Showers

Website: https://housedoctors.com/st-louis/
Address: 1286 Jungermann Rd Suite #H, St Peters, MO 63376
Phone: (636) 724-8008

Butler Home Improvement

Collinsville, IL
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Double-Hung
  • Service icon Custom Window Designs

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

Martin Door

St Peters, MO
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Award-Winning
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows
  • Service icon Custom Window Designs

Website: https://www.mdstl.com/
Address: 3037 N St Peters Pkwy, St Peters, MO 63376
Phone: (636) 928-3875

LEI Home Enhancements

St. Louis, MO
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Award-Winning

Services Offered

  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Sliding Glass
  • Service icon Custom Window Designs

Website: https://leihomeenhancements.com/stlouis/
Address: 111 W Port Plaza Dr 6th floor, St. Louis, MO 63146
Phone: (314) 334-1597

How Installing Energy-Efficient Windows in Alton Saves You Money

There are quite a few benefits of switching to energy-efficient windows. Some reasons you may want to consider making the switch include the following:

  • Save on energy bills: The Department of Energy estimates that heat gained or lost via windows accounts for around 25-30% of household energy use. Installing energy-efficient windows can help reduce that amount, which helps you save more on your bills.
  • Reduce your carbon footprint: In Alton, you can reduce your indirect greenhouse gas emissions by about 642 pounds per year after you install energy-efficient windows.
  • Protect your investment: If your home is on the older side, your windows are most likely outdated. Upgrading your windows can improve the insulation in your home and also help raise the value of your home if you decide to sell.
  • Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.

Estimated Cost of Window Replacement in Alton

Let's take a look at the cost of replacing your windows and the kinds of services offered by installers.

How Much Do New Windows Cost?

The typical cost to install a single window is about $600 but can range from $200 to $1,200. These amounts vary based on the specifics of your installation, like material, the location of your home, size, number of windows, type and more.

Whether or not you opt for energy-efficient windows is another factor that will determine the cost. These will usually cost more than other windows, but on the other hand, you can save about $313 a year on your energy bills in Alton.

The cost of your window installation will also vary depending on the kind of window material you choose for the frames. Wood windows are generally the most expensive, but it depends if they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are more efficient.

What Services do Window Installers Offer?

The first step when planning a replacement is to figure out whether you need a full-frame or pocket installation.

Full-frame installations entail replacing the total window, including the sill, frame and trim. Full-frame installations are necessary when you want a new style or your window has significant damage. Because full-frame installations are more involved, they will raise the total cost. A pocket installation means replacing a window without taking out the complete frame, which is usually cheaper than a full-frame installation.

If you're unsure which kind of window installation service you should get, your installer can advise you. Generally, the choice is influenced by factors such as the age and condition of the home, the type of building material, budget and time restrictions.

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Award-winning company
  • Great industry reputation
  • Member of US Green Building Council
  • More expensive than competition

Best Affordability

Window World

★★★★★
4.5

  • Great industry reputation
  • Lifetime warranty
  • EnergyStar Partner
  • Quality of service will depend on your area

Best for Residential Windows

Window Nation

★★★★★
4

  • Custom designs
  • Wide variety of products and services
  • Manufactures products in-house
  • Installation not covered by warranty

How We Choose the Best Window Installers in Alton

The EcoWatch Reviews team is different from other reviewers since we assess these companies through a sustainability lens. We've decided to review the top window installation companies in Alton primarily based on energy efficiency, as it's what's best for the environment and for you as a homeowner. Energy Star certified windows have been shown to cut your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

This one is self-explanatory, but we've chosen to highlight window installation companies that serve Alton so you can find a quality window installation company near you.

Work Quality

When picking new windows, the quality and breadth of services can often play just as important of a role in overall efficiency and performance as the brand of window you opt for. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent customer feedback to determine the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction may be the most important factor, as it reflects the quality of services across most other categories, including professionalism, quality of parts, quality of installation, warranty, cost and more.

Cost

This one is a give-and-take: as with most services, cheap window companies won't always provide the highest quality service. On the other hand, we want to make sure we're highlighting companies that offer a spectrum of price and financing options so they're accessible to most homeowners.

Warranty

Protecting your investment in new windows is important. That's why window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Last but not least, we like to see companies that have been in the industry for quite some time. Window installers that have more experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.

Alton, IL Window Replacement FAQs

How much does window installation cost?

The typical cost of installing one window ranges between $450 and $650. There are several factors that influence the cost, which include styles and sizes of windows, the materials used in designing the windows, how energy-efficient the windows are, the number of windows, local labor costs and your property's location.

What type of window is the best for energy efficiency?

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

When should I use a window installation company?

Unless you have home repair skills and have the time needed to replace your own windows, we recommend hiring the pros. The process of installing windows is complex and can take anywhere from four to six hours for a single window. Although it's tempting to try to save some money by doing it yourself, hiring a professional is a faster, more efficient and safer alternative.

When is the best time of year to replace windows?

Replacement windows can be installed any time of the year, but autumn might be the best season. Regardless of when you install them, the contractors will take steps to make sure that too much hot or cold air doesn't get into your home, so the temperature outside isn't necessarily a big factor. Most importantly, the weather should be dry.

How often do you need to replace windows?

Windows generally last around 20 to 30 years, but anytime you notice damage on your windows, it's a good time to have them looked at by an expert to determine if they are in need of a repair or replacement.

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