20 Best Window Companies in Louisville, CO (2025 Reviews)
If you’re thinking about getting new windows, our guide to the top window installation companies can help.
We analyzed all the top-rated window companies in Louisville and selected the best 20 based on:
Customer reviews
Window installation expertise
Popularity with home-owners like you
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Why you can trust EcoWatch
The EcoWatch Reviews team is all about finding solutions for eco-conscious homeowners in Louisville. Potential leaks or drafts from your windows can make your AC or heater work extra hard in the summer or winter.
That’s also bad for the environment, as the additional energy required by damaged windows increases your carbon footprint.
We’ve made this guide on the top installation companies to help you in your search, so you can not only enjoy brand-new windows, but also save money on your electricity bills.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best Window Installation & Replacement Companies in Louisville
The EcoWatch team examined dozens of window companies in Louisville to find the best ones for our readers. The providers mentioned in this article scored best in our categories: energy-efficient offerings, availability, customer service, price 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 has windows expertise in Louisville. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window business for around 27 years. Hundreds of positive reviews on customer review websites back the provider's reputation.
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 WindowsWindow World is an Energy Star partner and offers 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 Louisville?Although prices are 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 more accurate pricing information, 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 has the best availability in Louisville. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has been in the window business for around 27 years. Hundreds of positive reviews on customer review websites back the provider's reputation.
Andersen may be the company for you if you want one that 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 and offers 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 Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Louisville?Although prices are 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 more accurate pricing information, you can request a quote on the company’s website.
We have tried to be unbiased and transparent by describing pros and cons for every company. Additionally, any partnerships do not affect our rankings.
More Window Companies in Louisville
Renewal by Andersen Window Replacement
Longmont, COPrice Transparency
Free assessment
Good Customer Service
Services Offered
Glass Doors
Metal Frames
Bay Windows
Custom Window Designs
Double-Hung
Vinyl Frames
Window Replacement/Installation
Energy-Efficient Options
Champion Replacement Windows of Ft. Collins
Loveland, COENERGY STAR® certified
Free assessment
Good Customer Service
Price you're quoted is the price you pay
Products made in the USA
Price Transparency
Services Offered
Double-Hung
Window Replacement/Installation
Bay Windows
Glass Doors
Champion Replacement Windows of Denver
Denver, COPrice Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Double-Hung
Glass Doors
Bay Windows
Power Home Remodeling
Centennial, COGood Customer Service
Price Transparency
Free assessment
Timely Service
Services Offered
Energy-Efficient Options
Window Replacement/Installation
DaBella
Denver, COGood Customer Service
Wide range of styles
Customized to your home
Timely Service
Triple-pane vinyl windows
Services Offered
Glass Doors
Double-Hung
Window Replacement/Installation
Vinyl Frames
Window Nation
Aurora, COFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Custom Window Designs
Glass Doors
Energy-Efficient Options
Bay Windows
Window Replacement/Installation
Double-Hung
DMD Window & Door
Wheat Ridge, COGood Customer Service
Price Transparency
Free assessment
Timely Service
Services Offered
Glass Doors
Vinyl Frames
Energy-Efficient Options
Window Replacement/Installation
Custom Window Designs
Wood Frames
Custom Exteriors
Berthoud, COGood Customer Service
Price Transparency
Educational Website
Free assessment
Timely Service
Services Offered
Bay Windows
Window Replacement/Installation
Vinyl Frames
Glass Doors
Bright Idea Egress — Window Kits
Sheridan, COGood Customer Service
Price Transparency
Timely Service
Free assessment
Educational Website
Services Offered
Wood Frames
Window Replacement/Installation
Metal Frames
Storm Exteriors
Centennial, COPrice Transparency
Free assessment
Good Customer Service
Educational Website
Timely Service
Services Offered
Window Replacement/Installation
Loveland Window Cleaning Services
Loveland, COFree assessment
Good Customer Service
Services Offered
Energy-Efficient Options
Window Replacement/Installation
United Windows Pro - Windows and glass repair
Aurora, COFinancing options available
Educational Website
Good Customer Service
Price Transparency
Commercial and residential
Timely Service
Free assessment
Fast emergency response
Services Offered
Tempered Glass
Energy-Efficient Options
Triple Pane Glass
Glass Repair
Glass Doors
Window Replacement/Installation
Wood Frames
Window Repair
Colorado Windows and Restoration
Highlands Ranch, COPrice Transparency
Good Customer Service
Timely Service
Free assessment
Services Offered
Glass Doors
Double-Hung
Window Replacement/Installation
Powerhouse Roofing and Exteriors
Greeley, COEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
AllGuard Windows and Doors Fort Collins
Fort Collins, COFree assessment
Price Transparency
Good Customer Service
Services Offered
Double-Hung
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Wood Frames
Vinyl Frames
Fiberglass Frames
Metal Frames
All-Star Construction Windows & Doors
Parker, COEducational Website
Free assessment
Good Customer Service
Services Offered
Energy-Efficient Options
Vinyl Frames
Glass Showers
Mirrors
Window Replacement/Installation
Glass Repair
BlueBird Windows & Doors
Lafayette, COPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Energy-Efficient Options
Double-Hung
Window Replacement/Installation
Glass Doors
Bay Windows
Slade Glass Co.
Boulder, COFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Mirrors
Glass Repair
Window Replacement/Installation
Glass Showers
WestPro | Roofing, Siding, Windows
Longmont, COEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Storm/Impact Windows
Window Replacement/Installation
Glass Doors
Skylights
Colorado Glass and Mirror LLC
Denver, COFree assessment
Services Offered
Window Replacement/Installation
Mirrors
Window Repair
Custom Glass
Glass Showers
Calculate how much you can expect to pay for window installation and replacement in Louisville, CO 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 Louisville Saves You Money
By switching to energy-efficient windows, you can enjoy several benefits, including:
- Save on electricity bills: Because energy-efficient windows reduce how much energy you need to heat or cool your home, the switch can help you save around $457 annually on your energy bills in Louisville.
- Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help prevent your floors, carpets and furniture from fading by filtering out UV rays.
- Protect your investment: Upgrading your windows is an important part of maintaining your property and its real estate value, particularly if you have an older home.
- Reduce your carbon footprint: Since energy-efficient windows improve the insulation in your house, you can reduce your carbon footprint by about 12%, according to Energy Star.
Estimated Cost of Window Replacement in Louisville
Windows come in different shapes and sizes, so costs and services will vary greatly. Here are the typical costs and the primary services that you’ll find from window installers.
How Much Do New Windows Cost?
Even though the average cost to install a single window is about $600, it can range from $200 to $1,200. But costs vary remarkably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also offer door installations, which will add extra costs to your project.
Whether or not you pick energy-efficient windows is another factor that will influence the cost. These will almost always cost more than other windows, but on the other hand, you can save about $457 a year on your energy bills in Louisville.
The cost of your window installation will also vary depending on the kind of material you choose for the frames. Wood windows are usually the most expensive, though it depends on whether they are 100% wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are more efficient.
What Services do Window Installers Offer?
The first step when considering an installation is to clarify whether you should get a full-frame or pocket installation.
Full-frame installations involve replacing the complete window, including the sill, trim and frame. Full-frame installations are necessary when you want a new style or your window has significant damage. These installations are more involved and will raise the overall cost. Pocket installations are on the simpler end and won’t carry as large a bill because they involve simply replacing the window within its existing frame. But if the frame has any damage or rot, you may have to get a full-frame installation instead.
Your window installation company can recommend the best type for your project. In Louisville, the choice will mostly be based on how much damage there is currently and the condition of your existing frames.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
How We Choose the Best Window Installers in Louisville
In our hunt to make your home improvements easier and more eco-friendly in Louisville, the EcoWatch team chose the above companies as the top window installation companies in the city. We’ve reviewed the best window installation companies in Louisville mostly based on energy efficiency, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can reduce your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
This one is pretty self-explanatory, but we’ve chosen to highlight window installation companies that serve a wide variety of states and cities so you can find the right window installation company near you.
Work Quality
When picking new windows, the quality and breadth of services often plays just as important of a role in insulation and performance as the type of window you get. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed patterns in recent online reviews to determine the companies with the most consistent customer satisfaction. Customer satisfaction might be the factor we place the most value on, as it reflects the quality of services across most other categories, including quality of installation, warranty, quality of parts, professionalism, cost and more.
Cost
Cheaper windows certainly don’t mean better windows, but we know many of our readers want 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
As discussed previously, windows are a significant investment, so you’ll want to make sure that investment is well protected. 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 a good track record in the industry. Window installation companies that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.
Louisville, CO Window Replacement FAQs
How much should a window install cost?
The national average cost of replacing a window is about $600 but can range between $200 and $1,200, based on several factors. The price is usually dependent on the size of the window, the type and material of the window and the location of your property. Also, remember that energy-efficient windows may cost more initially but can save you a decent amount of money a year in energy bills.
What are the different kinds of windows?
There are several different types of windows you can get for your home, such as slider windows, double-hung and single-hung windows, awning windows, transom windows, casement windows, bay windows and picture windows.
What do window installers do?
Window installers visit your home to remove your old windows and replace them with new ones. Some companies install products manufactured by other companies, whereas others are both manufacturers and installation companies combined. The installer will also clean up after the installation.
When is it time to replace your windows?
Windows typically last about 20 to 30 years, but anytime you see damage on your windows, it’s a good idea to have an expert take a look at them to determine if they need any repairs or replacements.
Should I replace my windows all at once?
If you’re upgrading your windows to save on your energy bills, replacing all of your windows together is the only way to gain that benefit. On the other hand, if you have only a few windows that are broken or drafty, you can replace just those.