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10 Best Window Replacement Companies in Alton, IL

More than 380 people have received a free quote in the last 60 days.

Last Updated: February 25, 2025

Upgrading your windows can be expensive, but is an excellent way to improve the energy efficiency and value of your home. Drafty, leaky windows can cost you in power bills — about an extra $255 a year in Alton. The Department of Energy estimates that 25–30% of your home’s heat or cool air could be going out your windows. Our guide to the top window installers in Alton will help you select the best installer for you.

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.
Top Pick
4.1/5
  • Great quality
  • Free assesment
  • Timely Service
Best Customer Service
4.3/5
  • Great customer service
  • Transparent pricing
  • Award winning company
Most Customizable
4.0/5
  • Holds high customer ratings
  • Offers energy-efficient products
  • Provides a lifetime labor warranty

Top 10 Best Window Replacement Companies in Alton

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

Renewal by Andersen

Renewal by Andersen Logo

Our Rating

User Rating

2446 Schuetz Rd, Maryland Heights, MO 63043 (314) 983-9977 renewalbyandersen.com

Good customer service

Price transparency

Timely service

Free assessment

Educational website

Services Offered

Glass doors
Bay windows
Skylights
Double-hung
Window replacement/installation

Champion Replacement Windows of St. Louis

Champion Replacement Windows of St. Louis Logo

Our Rating

User Rating

29 Cassens Ct, Fenton, MO 63026 (636) 764-0470 championwindow.com

Price transparency

Good customer service

Free assessment

Services Offered

Bay windows
Window replacement/installation
Glass doors
Double-hung

Empire Supply Co

Empire Supply Co Logo

Our Rating

User Rating

7286 Manchester Rd, St. Louis, MO 63143 (314) 645-2633 empiresupplystl.com

Good customer service

Free assessment

Price transparency

Educational website

Services Offered

Vinyl frames
Energy-efficient options
Metal frames
Tempered glass
Double-hung
Glass doors
Mirrors
Storm/impact windows
Window replacement/installation

Building Envelope Experts

Building Envelope Experts Logo

Our Rating

User Rating

1576 Fencorp Dr Suite 160, Fenton, MO 63026 (314) 310-7878 buildingenv.com

Educational website

Price transparency

Good customer service

Timely service

Free assessment

Services Offered

Vinyl frames
Window replacement/installation
Glass doors
Custom window designs
Energy-efficient options
Bay windows
Double-hung

Window Nation

Window Nation Logo

Our Rating

User Rating

1913 Belt Way Dr, Overland, MO 63114 (314) 279-8249 windownation.com

Good customer service

Price transparency

Educational website

Free assessment

Services Offered

Vinyl frames
Glass doors
Custom window designs
Window replacement/installation
Energy-efficient options
Double-hung
Bay windows

Glass Doctor of Greater St. Louis

Glass Doctor of Greater St. Louis Logo

Our Rating

User Rating

9400 Manchester Rd, St. Louis, MO 63119 (314) 962-4344 glassdoctor.com

Educational website

Price transparency

Good customer service

Services Offered

Window repair
Window replacement/installation
Glass repair
Glass showers
Energy-efficient options
Glass doors
Custom glass
Mirrors
Tempered glass

Glass Doctor of St. Charles, MO

Glass Doctor of St. Charles, MO Logo

Our Rating

User Rating

3910 Old Hwy 94 S Ste 105A, St Charles, MO 63304 (314) 962-4344 glassdoctor.com

Good customer service

Educational website

Price transparency

Services Offered

Mirrors
Energy-efficient options
Window repair
Glass repair
Tempered glass
Custom glass
Glass doors
Glass showers
Window replacement/installation

Home Services at The Home Depot

Home Services at The Home Depot Logo

Our Rating

User Rating

5501 Belleville Crossing St, Belleville, IL 62226 (224) 241-2501 homedepot.com

Price transparency

Good customer service

Free assessment

Educational website

Services Offered

Custom window designs
Screen repair
Skylights
Glass doors
Metal frames
Storm/impact windows
Vinyl frames
Glass repair
Glass showers
Window replacement/installation

Mad City Windows & Baths

Mad City Windows & Baths Logo

Our Rating

User Rating

959 Harmsted Court, St Charles, MO 63301 (314) 396-6394 madcitywindows.com

Free assessment

Educational website

Price transparency

Good customer service

Services Offered

Bay windows
Window replacement/installation
Vinyl frames
Energy-efficient options
Double-hung
Glass showers

Chaney Windows And Doors

Chaney Windows And Doors Logo

Our Rating

User Rating

80 Weldon Pkwy, Maryland Heights, MO 63043 (636) 699-6353 chaneywindowsanddoors.com

Educational website

Good customer service

Free assessment

Price transparency

Services Offered

Energy-efficient options
Window replacement/installation
Bay windows
Wood frames
Vinyl frames
Glass doors
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on window replacement companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How Much Does Window Installation Cost In Alton?

The price of window installation or replacement varies based on several factors, including how difficult your windows are to access or install, the number and size of the windows, and the materials you choose. On average, homeowners in Alton spend around $280 per window*. Below are additional cost breakdowns. *Cost data based on sample pricing for window installation from multiple retailers and adjusted for local cost of living.

When To Replace Windows

Installing new energy-efficient windows can substantially boost your home's value, noise reduction, comfort, appearance, and insulation. Some clear signs it's time to invest in new windows include the following:

  • A chilly house and high energy bills due to poor insulation around windows.
  • Fogging between window panes, condensation issues, or rotting window frames letting in moisture.
  • Windows that are difficult to close, open, and lock properly due to wear and age.
  • Drafts and cold air leaking in through old, loose-fitting windows.
  • Inefficient and outdated window styles that take away from your home’s curb appeal.

How To Choose a Window Company

Choosing a window installer with the right qualifications helps ensure a smooth installation. We review the most important considerations for choosing a qualified provider below.

Experience

Make sure you choose a seasoned local installer with a proven track record of successfully installing and replacing windows. Installers that have been operating locally for many years are more likely to have a deep knowledge of the local climate and local homeowners' needs. Get references from recent clients to confirm a company provides quality installations.

Certifications

Look for installers that are backed by top window manufacturers and accredited by top industry associations, including the Fenestration and Glazing Industry Alliance, formerly known as the AAMA. Proper certification shows that a provider has gotten proper training in installation best practices. Ensure installers are employees, not subcontractors, and verify that the technicians working on your home have the right certifications.

Reputation

Spend time reading through online reviews, checking the Better Business Bureau (BBB), and asking for local references. Review customer feedback to confirm that a company consistently does quality work and provides good service. Avoid companies with complaints of poor work or unfinished jobs.

Process

A good window installer will be able to provide a detailed project plan, reasonable timelines, clear expectations, and an overview of all material and installation options. Avoid companies that provide unclear quotes or schedules. Ask for ongoing contact throughout to avoid surprises further into the project.

Warranties

Research window firms that back their installations with guarantees, and that provide warranties on materials and labor. This demonstrates confidence in their work. Also seek out unlimited lifetime warranties that can transfer to new homeowners.

Materials

Confirm that a window provider offers windows built for longevity as well as leading energy-efficient window bands that fall within your budget. Research choices with enhanced UV protection, good energy ratings, and design flexibility, and verify that the materials have their own manufacturer warranties.

Frequently Asked Questions About Window in Alton, IL

In Alton, the best time to install windows is during the late fall when the temperatures are milder, so the windows can seal and adjust properly. A good local window installer in Alton will be able to explain when the best time is to install windows on your house.

The best type of replacement window for your Alton home will depend on your home's age, as well as your personal style and budget. You'll want to consider the style of your home — such as if it's old — so your new windows match. Wood windows can provide a traditional look and appearance, while vinyl windows tend to be popular in more modern homes. Fiberglass windows are also a popular choice, since they are energy efficient and durable.

The types of window that usually last longest are ones crafted from vinyl or wood, with double glaze for extra insulation. Vinyl windows are famous for their durability and require little maintenance, and wood windows provide a more traditional look. Tripling up on the glazing will help reduce heating and cooling bills over time.

It depends on your specific needs and budget, but generally it's advised to replace all your windows at once if they're not energy efficient. Replacing all your windows at once guarantees that you'll get the most out of your energy efficiency and can possibly save you money in the long run. This is important in Alton, where the average energy bills are roughly $851 a year.

Replacing your own windows can be a difficult task, especially in Alton, where temperatures can get quite warm. It's generally recommended to hire a skilled window installer. Their knowledge and experience ensures your windows are properly installed and that you get the most out of your investment.

Window replacement companies in Alton typically offer several services, such as installation, fixing windows, window maintenance, window cleaning, tinting, and weatherproofing.

Getting windows installed by a professional can provide a number of benefits. Professional installers can make sure that your windows are properly fitted, sealed, and insulated, minimizing air leakage and maximizing energy efficiency. Professional installers are also trained in the necessary tools and techniques to do the job right, saving you time and money.

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