15 Best Window Replacement Companies in Knoxville, IA (Mar 2023)
Window Companies Near Me
If you're thinking of getting new windows, our guide to the best window installation companies can help.
We analyzed all the top window installers in Knoxville and selected the top 15 based on:
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Customer reviews
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Window replacement expertise
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Popularity with home-owners like you
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Updated March 14, 2023
Why you can trust EcoWatch
Although environmentally friendly energy sources like wind and solar are important when it comes to lowering your carbon footprint, improving your home's efficiency can also have a large impact on home energy conservation. Drafty windows can make your AC or heater work extra hard in the summer or winter.
Replacement windows improve the insulation in your home, not only making you more comfortable during extreme temperatures, but also saving you money and helping the environment.
Unlike other sites, EcoWatch ranks window replacement companies based on energy efficiency while also taking into consideration cost, customer satisfaction and service area.
Best Affordability
Window World
- Great industry reputation
- Lifetime warranty
- Large serice area
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Manufactures products in-house
- Member of US Green Building Council
- Award-winning company
- No lifetime warranty
Best Warranty
Universal Windows Direct
- Manufactures products in-house
- Makes charitable contributions
- Lifetime warranty
- Quality of service will depend on your area
Best Window Replacement Companies in Knoxville
The EcoWatch Reviews team researched dozens of companies that service the Knoxville area to find the top window installation companies by our standards. We assessed the companies based on energy-efficient offerings, local experience, price, coverage area, customer service and more.

Window World
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Great industry reputation
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Lifetime warranty
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Large serice area
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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. This provider has 27 years of experience in the window installation industry, and it has become one of the best companies in Knoxville. Its reputation is backed by several positive reviews from customers online.
You may want to consider opting for Window World if you're looking for 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 WindowsWindow World is an Energy Star partner with a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company's windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Window World representative when inquiring about services.
How much does Window World cost in Knoxville?Window World does not detail prices on its website, but it's known for offering some of the most affordable window installations around. For more detailed information on pricing, you can request a quote from the company.

Renewal by Andersen
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Manufactures products in-house
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Member of US Green Building Council
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Award-winning company
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No lifetime warranty
Renewal by Andersen provides the best availability in Knoxville. This company has been in business since 1995 and currently provides services to nearly every state except Mississippi and West Virginia. The provider has plenty of positive 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 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 make sure to ask your Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Knoxville?Andersen doesn't have any prices available 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. Requesting a free quote on its website is the best way to know for sure.

Universal Windows Direct
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Manufactures products in-house
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Makes charitable contributions
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Lifetime warranty
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Quality of service will depend on your area
Universal Windows Direct offers the best warranty in Knoxville. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This company has 20 years of experience in the window installation business, and it has established itself as one of the most respected companies in Knoxville.
If you're looking for a company that has an industry-leading warranty covering products, parts and workmanship for life, Universal may be the right provider for you.
Energy Efficiency of Universal Windows Direct WindowsThere 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 Knoxville?Pricing details are not available on Universal's website since the cost of window replacement varies greatly depending 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. You can ask for a free quote on its website for more information about pricing.
We have tried to stay unbiased and transparent by describing pros and cons for each provider. Additionally, any partnerships do not affect our rankings.
More Window Replacement Companies in Knoxville
Pella Corporation
Pella, IA-
Excellent Customer Service
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Free Quotes
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Price Transparency
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Award-Winning
Services Offered
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Residential Windows
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Business Windows
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Double-Hung
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Sliding Glass
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Bay Windows
All American Exteriors
Indianola, IA-
Educational Website
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Arrives on Time
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Price Transparency
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Excellent Customer Service
Services Offered
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Residential Windows
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Custom Window Designs
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Aluminum Window Frames
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Business Windows
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Double-Hung
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Sliding Glass
Basement Replacement Experts
Indianola, IA-
Locally Recognized for Quality
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Good Customer Service
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Arrives on Time
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Helps Educate Customers
Services Offered
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Residential Windows
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Glass Showers
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Custom Windows
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Business Windows
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Double-Hung
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Sliding Glass
Window Source of Des Moines
Des Moines, IA-
Free Quotes
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Dependable Service
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No-Hassle Pricing
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Educational Website
Services Offered
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Architectural Glass
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Energy-Efficient Options
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Tempered Glass
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Custom Windows
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Commercial Windows
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Double-Hung
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Sliding Glass
Window World of Des Moines
Des Moines, IA-
Educational Website
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Good Customer Service
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Dependable Service
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Free Quotes
Services Offered
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Custom Windows
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Architectural Glass
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Sliding Glass
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Double-Hung
Sassman Glass & Mirror
Des Moines, IA-
Excellent Customer Service
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No-Hassle Pricing
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No-fee Quotes
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Helps Educate Customers
Services Offered
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Residential Windows
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Doors
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Custom Windows
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
Spahn & Rose Lumber Co.
Newton, IA-
No-fee Quotes
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Good Customer Service
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Helps Educate Customers
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Price Transparency
Services Offered
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Custom Windows
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Fast Delivery
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Architectural Glass
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Commercial Windows
Kraig Chevrolet Buick
Oskaloosa, IA-
No-Hassle Pricing
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No-fee Quotes
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Excellent Customer Service
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Helps Educate Customers
Services Offered
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Custom Window Designs
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Fast Delivery
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Double-Hung
Midwest Seamless Vinyl Siding & Windows Inc.
Des Moines, IA-
Excellent Customer Service
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Helps Educate Customers
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Price Transparency
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Free Quotes
Services Offered
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Sliding Glass
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Custom Windows
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Energy-Efficient Options
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Double-Hung
Go Kraig
Oskaloosa, IA-
Free Quotes
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Excellent Customer Service
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Helps Educate Customers
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Reliable Appointment Windows
Services Offered
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Custom Windows
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Double-Hung
Pella Windows & Doors of Pella
Pella, IA-
No-Hassle Pricing
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Good Customer Service
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No-fee Quotes
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Helps Educate Customers
Services Offered
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Custom Windows
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Sliding Glass
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Double-Hung
Corn Belt Aluminum, Inc.
Des Moines, IA-
Free Quotes
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Good Customer Service
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No-Hassle Pricing
Services Offered
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Custom Windows
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Aluminum Window Frames
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Sliding Glass
R&B Auto Glass
Des Moines, IA-
Helps Educate Customers
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Excellent Customer Service
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No-Hassle Pricing
Services Offered
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Aluminum Window Frames
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Full-Service Installations
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Custom Window Designs
Pella Glass & Home Improvement
Pella, IA-
Educational Website
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Good Customer Service
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No-Hassle Pricing
Services Offered
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Custom Window Designs
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Residential Windows
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Business Windows
Indianola Window Tint
Indianola, IA-
Price Transparency
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Good Customer Service
Services Offered
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Custom Windows
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Double-Hung
How Installing Energy-Efficient Windows in Knoxville Saves You Money
When you switch to energy-efficient windows, you may see some benefits, such as:
- Save on energy bills: Once you upgrade to energy-efficient windows, you can see a reduction in your bills by about 12% since you'll need less energy to heat or cool your home.
- Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes tend to have windows that are outdated, drafty or maybe even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only insulate your home better, but also filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Decrease your carbon footprint: In Knoxville, you can lower your indirect greenhouse gas emissions by about 960 pounds per year once you upgrade to energy-efficient windows.
Estimated Cost of Window Replacement in Knoxville
Windows come in varying shapes and sizes, so costs and services will vary considerably. Here are the average costs and the primary services that you can find from window installation companies.
How Much Do New Windows Cost?
On average, homeowners in Knoxville can anticipate that most replacement window installations will cost between $250 and $1,200, with the average cost at about $600. But costs will differ significantly based on the quality of your products, the number of windows you need, the current condition of your home and your location. Many window companies also offer door installations and other add-ons like shutters, coating, baths and more. Additional services will increase your overall project costs.
Whether or not you opt for energy-efficient windows is another factor that will affect the cost. These will almost always cost more than other windows, but on the other hand, you can save about $426 a year on your energy bills in Knoxville.
Getting free quotes from several companies is the best way to figure out which one is right for you.
What Services do Window Installers Offer?
When it comes to window installations, in general there are two kinds that your provider will offer: full-frame and pocket installations.
A full-frame installation is a replacement of the total window. This service involves taking out the old window, the windowsill, and the exterior and interior trim. It can also involve other materials, such as insulation and drip edges, which increase the total cost of the project. It's also worth noting that you may have to touch up the paint around the window after a full-frame installation. A pocket installation entails replacing a window without replacing the frame. So, instead of taking out the whole window and rebuilding it, the installer will just slide the replacement window (also called a retrofit or insert window) into the frame.
If you're still trying to decide which kind of installation you need, you can consult with your provider and get their advice. The decision mostly is influenced by how old the frames are and if there's any damage present.
Best Affordability
Window World
- Great industry reputation
- Lifetime warranty
- Large serice area
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Manufactures products in-house
- Member of US Green Building Council
- Award-winning company
- No lifetime warranty
Best Warranty
Universal Windows Direct
- Manufactures products in-house
- Makes charitable contributions
- Lifetime warranty
- Quality of service will depend on your area
How We Choose the Best Window Installers in Knoxville
In our search to find the most reliable, eco-friendly window installers in Knoxville, the EcoWatch team assessed dozens of companies before settling on these. Along with energy efficiency, we assessed window companies all across the state and ranked them based on the following methodology:
Service Area
Because this is a guide for Knoxville, we only included companies that provide services to the city. There are certainly other reputable providers that didn't make the cut because of the low odds that they would serve the average homeowner in Knoxville.
Work Quality
We're certain that you're looking for professionals who do a great job installing windows. We've vetted each installer featured in our guide to make sure its contractors are well-qualified and that the company has gotten tons of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed patterns in recent online reviews to find the companies with the highest rates of customer satisfaction. Customer satisfaction might be the most important factor, as it indicates the quality of services across nearly every category, including warranty, professionalism, quality of parts, cost, quality of installation and more.
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 providers' prices, we gave higher points to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
Protecting your investment in new windows is important to many homeowners. That's why window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have been in the industry for a while. Window installation companies that have more years of experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.
Knoxville, IA Window Replacement FAQs
What is the average cost to replace windows in a home?
The average cost of replacing a single window ranges between $450 and $650. There are many factors that affect the price, which include styles and sizes of windows, the materials used in designing the windows, the number of windows, local labor costs, how energy-efficient the windows are and your property's location.
Which kind of window is the best?
Generally, double-pane windows are more efficient than single-pane windows and windows that do not open will be more efficient than windows that do. To be sure you'll get the most energy-efficient windows, look for models that have the blue Energy Star certification — this means they're certified energy-efficient by the U.S. Department of Energy.
What do window installation companies do?
Window installation professionals visit your house to remove your old windows and replace them with new ones. Some companies install products sold by other companies, whereas others install their own windows. The installer will also clean up after the installation is complete.
What time of year is a good time to replace my windows?
Replacement windows can be installed during any season, but autumn might be best. No matter 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.
Should I replace all my windows at the same time?
If your windows are more 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. Replacing your windows all at once will involve less paperwork and less stress.