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Best Window Replacement Companies in Janesville, WI

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Written By Max Peterson|Last Updated: May 18, 2024

Replacement windows can protect your home from water damage, boost its energy efficiency, and provide it with some extra visual flair. If your windows are aging or showing signs of damage, it's likely time to install new ones. Hiring a certified window company will help you get the most satisfactory results and help you avoid costly mistakes from attempting to complete the job yourself.

Top Pick
  • Full-service installation
  • Large window selection
  • Nearly 30 years of experience
Best Financing
  • Full-service installation
  • In-house, U.S.-made products
  • More than 70 years of experience
Most Customizable
  • Full-service remodeling
  • 96% satisfaction rate
  • More than 30 years of experience

Top 10 Janesville Window Installation Companies

We recommend these local businesses for your window replacement project in Janesville.

Janesville residents can trust the This Old House Reviews Team to provide timely, updated window installer recommendations. To determine the best companies, we focus on these five elements:

  • Professional experience and licensure
  • Energy-efficiency guarantees
  • Product quality
  • Services and warranties
  • Customer reviews and recommendations
Champion Replacement Windows of Madison Logo

Champion Replacement Windows of Madison

Based on 62 customer reviews.

Services Offered

Glass DoorsWindow Replacement/installationDouble-HungBay Windows


  • Free assessment
  • Price transparency
  • Good customer service
5321 Voges Rd, Madison, WI 608-205-4829 championwindow.com
Champion Replacement Windows of Milwaukee Logo

Champion Replacement Windows of Milwaukee

Based on 371 customer reviews.

Services Offered

Double-HungBay WindowsGlass DoorsWindow Replacement/installation


  • Good customer service
  • Free assessment
  • Price transparency
16560 W Glendale Dr, New Berlin, WI 414-208-4056 championwindow.com
Window World of Rockford Logo

Window World of Rockford

Based on 247 customer reviews.

Services Offered

Glass DoorsDouble-HungEnergy-Efficient OptionsWindow Replacement/installationCustom Window DesignsBay Windows


  • Free assessment
  • Good customer service
  • Timely service
6010 Forest Hills Rd, Loves Park, IL 815-395-1333 windowworldrockford.com
Bob’s Custom Windows & Siding, Inc. Logo

Bob’s Custom Windows & Siding

Based on 22 customer reviews.

Services Offered

Window Replacement/installationDouble-HungWood FramesCustom Window DesignsVinyl FramesBay WindowsGlass DoorsEnergy-Efficient Options


  • Educational website
  • Free assessment
  • Good customer service
1015 N Parker Dr, Janesville, WI 608-756-0735 bobscustomwindowsandsidinginc.com
City Glass Company, Inc. Logo

City Glass Company

Based on 41 customer reviews.

Services Offered

Window Replacement/installationGlass DoorsGlass ShowersMirrors


  • Educational website
  • Good customer service
  • Free assessment
2536 Center Ave, Janesville, WI 608-754-4411 cityglasswisconsin.com
Marling Lumber and HomeWorks Logo

Marling Lumber and HomeWorks

Based on 60 customer reviews.

Services Offered

Energy-Efficient OptionsWindow Replacement/installation


  • Price transparency
  • Educational website
  • Good customer service
1138 Humes Rd, Janesville, WI 608-754-1123 marling.com
Custom Quality Windows Logo

Custom Quality Windows

Based on 25 customer reviews.

Services Offered

Vinyl FramesWindow Replacement/installationDouble-HungGlass Doors


  • Free assessment
  • Price transparency
1928 Old Hwy 92, Evansville, WI 608-882-2743 customqualitywindows.com
Exceptional Exteriors LLC Logo

Exceptional Exteriors

Based on 17 customer reviews.

Services Offered

Glass DoorsWindow Replacement/installation


  • Educational website
  • Free assessment
  • Price transparency
441 Glacier Moraine Dr Unit 10, Stoughton, WI 608-354-6887 exceptionalremodeling.com
A O Bauer Glass Inc Logo

A O Bauer Glass

Based on 24 customer reviews.

Services Offered

Glass DoorsScreen RepairMirrorsStorm/impact WindowsEnergy-Efficient OptionsGlass RepairWindow Replacement/installationGlass Showers


  • Educational website
  • Free assessment
  • Good customer service
903 E Geneva St, Delavan, WI 262-728-4262 aobauerglass.com

More Local Window Companies

Soberg Window & Door Company

User Reviews: 4.5/5 

W5820 Co Hwy B
Walworth, WI 53184

Ackman Glass & Mirror

User Reviews: 4.5/5 

202 Elkhorn Rd
Williams Bay, WI 53191

Kobyco Inc

User Reviews: 4.2/5 

4131 N Perryville Rd
Loves Park, IL 61111

Mad City Windows & Baths

User Reviews: 4.7/5 

5020 Voges Rd
Madison, WI 53718

Budget Blinds of Madison

User Reviews: 5/5 

1200 John P Livesey Blvd Suite 100
Verona, WI 53593

Infinity Exteriors

User Reviews: 4.6/5 

2830 Progress Rd
Madison, WI 53716

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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Facts about Janesville
Annual Energy Efficient Windows Savings:$483
Average Max Temp:56°F
Average Min Temp:39°F
Average Daily Sunlight:51%
Average Annual Snowfall:36.6"
Average Monthly Precipitation:2.96"

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This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

How To Choose a Window Company in Janesville

It's essential to find a window replacement company that meets your specific values, needs, and preferences. Consider the following traits during your search:

Window Cost by Type

When it comes to replacing your windows, cost-effectiveness is king. Each window you buy should provide top-notch durability at an affordable price point. Choosing budget windows could actually raise your overall cost, due to their reduced lifespan and more intensive maintenance needs. The final cost of your window replacement will hinge on the specific styles, materials, and sizes you need. Single-hung windows often cost less due to their straightforward style and simple mechanisms, while a sweeping, custom-size picture window will cost more. It's wise to consult a reliable window installer to decide on your ideal options.

To help you form a rough estimate, this table shows the typical cost of the most common residential window types.

Window TypesAverage Cost
Glass Block$44-$559

Window Material Cost

You'll also need to select a window material. Homeowners often choose a material based on the local climate, energy efficiency objectives and aesthetic preferences. Aluminum windows are perfect for sleek, modern designs, but they cost more up-front. Wood windows cost less up-front, but you'll need to invest in regular maintenance to prevent the frame from warping and wear. Vinyl is readily available and tends to cost less, but don't underestimate its strong durability and low maintenance needs.

Window TypesAverage Cost

Other Window Replacement Costs

Ask each company you're considering about labor costs, warranty fees, and permit fees. This will help you understand the overall expenses involved in the project.

Experience and Training

Select a company that focuses on window repair and installation, and look for this information on its website:

  • How long it's been in business
  • Photo galleries of completed projects
  • Official non-government accreditations attesting to its workmanship
The more experience a company has, the better its service and workmanship.

Licensing and Credentials

Wisconsin builders need a Dwelling Contractor Qualifier certification from the Department of Safety and Professional Services for most residential work, including window replacement. The only exceptions are if a job is under $1,000 in value, or if your town doesn't require permits for window work.

Wisconsin is among a handul of states that mandate continuing education for construction companies. A representative must take at least 12 hours of training every other year to keep their license. The state actively promotes business and trade best practices.

Types of Windows Offered

There are numerous replacement window types you can choose from, and it's vital to find a company that specializes in the ones you want. Check a company's website and reviews for any of these types:

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

Customer Feedback

One of the greatest ways to evaluate a company is to see what other customers have said about their experiences. Read customer reviews on sites such as Trustpilot, Yelp, and Google. You can also view customer reviews and company ratings on the Better Business Bureau (BBB) website. Speak with people you know who have used a company you're interested in, and ask a representative for a copy of its reference list.

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Frequently Asked Questions About Window Replacement in Janesville

How could new windows help my energy efficiency?

Janesville homeowners could potentially save $480 each year by upgrading to efficient windows. They'll also reduce their property's carbon dioxide emissions by 720 pounds per year.

According to the national Department of Energy, as much as 33% of a house's HVAC usage is to compensate for the heat or cold entering through windows. Efficient windows help keep heat out in the summertime and retain heat in the wintertime, improving your comfort and furthering your dollar.

I've heard there are tax credits for energy-efficient windows. How much could I save?

Ultimately, the tax incentives you can claim are determined by the scope of your window replacement and the community you live in. You can claim up to 30% of the value of new efficient windows as a federal tax credit, up to $3,200 per year, until 2032. We also encourage you to get in touch with your city or county government for more information on financial benefits specific to your area.

How do replacement windows differ from new construction windows?

Replacement windows, also known as retrofit windows, are specifically designed for structures that already have existing windows. They fit into place in the existing window opening, without the need to remove or alter the surrounding materials or structure. New construction windows, on the other hand are designed for installing in a newly built home or during a significant renovation project. These windows include a nailing fin, which is a thin piece of metal or vinyl that extends from the frame. It's used to attach the window directly to the framing of the house, ensuring a secure fit.

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

More Window Resources

National Windows Company Ranking Methodology


Energy Star