20 Best Window Companies in Fond du Lac, WI (2025 Reviews)
If you’re thinking of upgrading to new windows, our guide to the best window installation companies can help.
We analyzed all the top-rated window companies in Fond du Lac and selected the best 20 based on:
Customer reviews
Window installation expertise
Popularity with home-owners like you
Please enter a valid 5-digit zip code!
Why you can trust EcoWatch
A review of the best window replacement companies in Fond du Lac may not seem like the most compelling article on the EcoWatch site, but trust us, windows impact your life more than you might realize. Drafty, leaky windows can cost you in electricity bills. In fact, the Department of Energy estimates that 25-30% of your house’s heat or cool air could be lost through your windows.
Fortunately, helping you save energy with efficient windows also aligns with our goals of conserving energy and the resources it takes to make it.
We’ve put together a list of the top installation companies to help you in your search, so you can not only take advantage of brand-new windows, but also save money on your power bills.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Window Installation & Replacement Companies in Fond du Lac
The EcoWatch Reviews team researched dozens of providers that serve the Fond du Lac area to find the best window installation companies that fit our standards. The providers in this article scored best in our review categories, such as energy-efficient offerings, price, customer service, local expertise, availability and more.

Window World
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
Quality of service will depend on your area
Window World provides windows expertise in Fond du Lac. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This provider has 27 years of experience in the window installation industry, and it has established itself as one of the most respected companies in the business. The company has hundreds of glowing reviews from customers on online review websites.
It 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 WindowsWindow World offers 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 Fond du Lac?Although pricing is not readily available on Window World’s website, it's known for offering some of the most affordable window installations around. If you’d like to know for sure, you can request a quote on the company’s website.

Renewal by Andersen
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
More expensive than competition
Renewal by Andersen provides the best availability in Fond du Lac. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This provider has 27 years of experience in the window installation industry, and it has established itself as one of the most respected companies in the business. The company has hundreds of glowing reviews from customers on online review websites.
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 WindowsRenewal by Andersen offers 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. 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.
How much does Renewal by Andersen cost in Fond du Lac?Although pricing is not readily available on Andersen’s website, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. If you’d like to know for sure, you can request a quote on the company’s website.
We have tried to remain unbiased and transparent by mentioning pros and cons for each installer. Additionally, any partnerships do not affect our reviews.
More Window Companies in Fond du Lac
Renewal by Andersen of Milwaukee Waukesha Showroom
Waukesha, WIFree assessment
Educational Website
Good Customer Service
Services Offered
Energy-Efficient Options
Double-Hung
Glass Doors
Skylights
Window Replacement/Installation
Custom Window Designs
Bay Windows
Champion Replacement Windows of Milwaukee
New Berlin, WIFree assessment
Price Transparency
Good Customer Service
Services Offered
Double-Hung
Window Replacement/Installation
Bay Windows
Glass Doors
Tiltin Windows, Doors and More
Appleton, WIEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Bay Windows
Glass Doors
Energy-Efficient Options
Home Window Repair & Replacement
Germantown, WIEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Storm/Impact Windows
Screen Repair
Glass Doors
Metal Frames
Energy-Efficient Options
Tempered Glass
Glass Repair
Double-Hung
Window Replacement/Installation
Wood Frames
Window Repair
Vinyl Frames
Total Glass And Paint
Hartford, WIEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Window Repair
Energy-Efficient Options
Window Replacement/Installation
Glass Showers
Glass Repair
Mirrors
Screen Repair
RNB Design Group LLC
Germantown, WITimely Service
Price Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Double-Hung
Glass Doors
Energy-Efficient Options
Glass Showers
Window Repair
Window Replacement/Installation
Bay Windows
Argo Glass & Windows - Home Window Repair & Glass Replacement
Milwaukee, WIFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Energy-Efficient Options
Double-Hung
Window Replacement/Installation
Tempered Glass
Storm/Impact Windows
Window Repair
Metal Frames
Glass Repair
Wood Frames
Glass Doors
Screen Repair
Vinyl Frames
Zenith Roofing and Construction
Waukesha, WIEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Skylights
Window Replacement/Installation
Urban Exteriors
Green Bay, WIPrice Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Energy-Efficient Options
Bay Windows
Window Replacement/Installation
Glass Doors
Double-Hung
Brighter Concepts Ltd - Solatube, RediLights, Indow Windows
Milwaukee, WIFree assessment
Price Transparency
Educational Website
Services Offered
Storm/Impact Windows
Skylights
Window Replacement/Installation
Absolute Quality Glass
New Berlin, WIPrice Transparency
Free assessment
Services Offered
Window Replacement/Installation
HomeSealed Exteriors, LLC
New Berlin, WIFree assessment
Price Transparency
Lifetime workmanship warranty
Online billing and payments
Educational Website
Free in-home consultations
Good Customer Service
Services Offered
Bay Windows
Window Replacement/Installation
Energy-Efficient Options
Glass Doors
Double-Hung
Four Leaf Roofing & Windows
New Berlin, WIEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Energy-Efficient Options
Bay Windows
Window Replacement/Installation
Absolute Restorations
Milwaukee, WIGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
AHT Wisconsin Windows
Appleton, WIPrice Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Triple Pane Glass
Glass Doors
Vinyl Frames
Double-Hung
Bay Windows
Packerland Home Improvement
Kaukauna, WIFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Energy-Efficient Options
Window Repair
Glass Doors
Window Replacement/Installation
Custom Window Designs
Windows of Wisconsin
Kaukauna, WITimely Service
Educational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Fiberglass Frames
Bay Windows
Double-Hung
Glass Doors
Apex Energy Solutions - Window Replacement & Entry Doors
Brookfield, WIEducational Website
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Window Works
Brookfield, WIGood Customer Service
Free assessment
Price Transparency
Services Offered
Custom Window Designs
Energy-Efficient Options
Bay Windows
Skylights
Glass Doors
Window Replacement/Installation
Pella Windows & Doors of Brookfield
Brookfield, WIGood Customer Service
Price Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Double-Hung
Custom Window Designs
Wood Frames
Glass Doors
Calculate how much you can expect to pay for window installation and replacement in Fond du Lac, WI using our customized window cost calculator.
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 Fond du Lac Saves You Money
There are quite a few benefits of switching to energy-efficient windows. Some reasons you may want to consider making the change include the following:
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only insulate your home better, but also filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
- Protect your investment: When your home is on the older side, your windows could also be outdated or drafty. Upgrading and repairing your windows is an important part of maintaining your property and its value.
- Reduce your carbon footprint: Decreasing the amount of energy you use also lowers your carbon emissions. You could reduce it by about 715 pounds.
- Save on electricity bills: After you switch to energy-efficient windows, you can expect a reduction in your bills by about 12% since you’ll require less energy to heat or cool your home.
Estimated Cost of Window Replacement in Fond du Lac
Let’s go over the cost of replacing your windows and the types of services offered by installers.
How Much Do New Windows Cost?
According to our market research, the national average cost to install a single window is about $600. However, window installation costs can range from $200 to $1,200 per window. These amounts vary depending on the specifics of your installation, such as size, number of windows, type, material, the location of your home and more.
Keep in mind that energy-efficient windows may cost more, but Energy Star predicts the upgrade will save you between $101 and $583 a year when installing single-pane windows and between $27 and $197 a year when installing double-pane, clear glass windows. These savings vary based on your local climate, energy rates and individual home characteristics.
Asking for free quotes from multiple companies is the best way to find out which one will work best for your budget.
What Services do Window Installers Offer?
Generally, there are two types of window replacement services companies offer: full-frame and pocket installations.
Full-frame installations entail replacing the full window, including the sill, frame and trim. Full-frame installations are necessary when you want to change the style of your windows or your window has noticeable rot or deterioration. Because these installations are more involved, they will raise the total cost. A pocket installation means replacing a window without removing the complete frame, which is generally less expensive than a full-frame installation.
If you’re not sure which type of window installation service you need, 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 Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
How We Choose the Best Window Installers in Fond du Lac
In our hunt to make your home improvements easier and more eco-friendly in Fond du Lac, the EcoWatch Reviews team assessed many companies before settling on these. We have assessed the best window installation companies in Fond du Lac mainly based on energy efficiency, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows have been shown to cut your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
This one is self-explanatory, but we’ve chosen to highlight window installers that serve a wide variety of states and cities so you can find the right window installation company near you.
Work Quality
When selecting new windows, the quality and range of services can often play just as important of a role in insulation and performance as the brand of window you choose. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
Another self-explanatory yet super important review factor is customer feedback. If most customers don’t have good feedback about their service from a certain company, it won’t be featured on EcoWatch.
Cost
Cheaper windows certainly don’t mean better windows, but we know many of our readers would like to keep costs as low as possible. When analyzing the prices of providers, we gave higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
As discussed, windows are a hefty investment, so you’ll want to make sure that investment is protected. Window installation companies with lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have a good track record in the industry. Window installation companies that have more experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.
Fond du Lac, WI Window Replacement FAQs
How much should window installation cost?
The national average cost of installing a single window is about $600 but can range between $200 and $1,200, depending on a few different factors. The price is generally influenced by the size of the window, the location of your property and the type and material of the window. Also, keep in mind that energy-efficient windows may cost more initially but can save you hundreds of dollars a year in energy bills.
Which type of window is the best?
A window’s energy efficiency is affected by several factors, such as 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 do I have to use a window installation company?
Unless you have experience with home improvement projects and have the time needed to replace your own windows, we recommend hiring a professional. 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 money by doing it yourself, hiring a professional is a faster, more efficient and safer option.
Should I replace all my windows at once?
If your windows are greater than 20 years old, it’s probably time to replace all of them. At that point, they are usually less efficient, leakier and/or more damaged than new windows. Doing your windows all at once will involve less paperwork and less time.