20 Best Window Companies in Westminster, CO (2024 Reviews)
Are you looking to replace your windows? Our list of the top window installation companies can help you narrow down which one to choose.
We analyzed all the top-rated window companies in Westminster 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 Westminster. During the winter months, the last thing you want is your heat to leak out of your drafty windows.
Installing efficient windows on your house can help you save money each month on your power bills — and you can help the environment as well.
So if you’re building a new home, renovating or changing out old windows in Westminster, this is the best place to get started.
Best Availability
Renewal by Andersen
- Great industry reputation
- 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 Westminster
The EcoWatch Reviews team examined dozens of installers in Westminster to find the best window installation companies for our readers. We assessed the providers based on energy-efficient offerings, price, local experience, coverage area, customer service 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 Westminster. Window World has been in the window installation business for around 27 years. The provider has a lot of glowing reviews from customers online.
You may want to consider choosing Window World if you're looking for a company 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 WindowsIts high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s offerings are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.
How much does Window World cost in Westminster?Window World does not display prices on its website, but it's known for offering some of the most affordable window installations around. You can ask for a free quote on its website for more information about pricing.

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 Westminster. Andersen has been in the window installation business for around 27 years. The provider has a lot of glowing reviews from customers online.
You may want to consider choosing Andersen if you're looking for a company 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 WindowsA 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. Not all of Andersen’s offerings are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Westminster?Andersen does not display prices 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. You can ask for a free quote on its website for more information about pricing.
We strive to be unbiased and transparent by listing pros and cons for every company we review. Additionally, our rankings are not affected by any partnerships.
More Window Companies in Westminster
Renewal by Andersen Window Replacement
Denver, COFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Bay Windows
Vinyl Frames
Custom Window Designs
Energy-Efficient Options
Double-Hung
Glass Doors
Window Replacement/Installation
Champion Replacement Windows of Denver
Denver, COGood Customer Service
Price Transparency
Free assessment
Services Offered
Double-Hung
Window Replacement/Installation
Bay Windows
Glass Doors
Champion Replacement Windows of Ft. Collins
Loveland, COGood Customer Service
Price Transparency
Free assessment
Services Offered
Double-Hung
Window Replacement/Installation
Bay Windows
Glass Doors
Power Home Remodeling
Centennial, COGood Customer Service
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Window World of Denver
Denver, COPrice Transparency
Free assessment
Timely Service
Good Customer Service
Educational Website
Services Offered
Custom Window Designs
Double-Hung
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Triple Pane Glass
Bay Windows
DaBella
Denver, COTimely Service
Good Customer Service
Services Offered
Vinyl Frames
Glass Doors
Double-Hung
Window Replacement/Installation
Window Nation
Aurora, COFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Bay Windows
Custom Window Designs
Window Replacement/Installation
Double-Hung
Energy-Efficient Options
Glass Doors
Colorado Glass and Mirror LLC
Denver, COFree assessment
Price Transparency
Good Customer Service
Services Offered
Mirrors
Window Repair
Glass Showers
Window Replacement/Installation
Custom Glass
Acorn Glass
Wheat Ridge, COFree assessment
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Window Repair
Glass Showers
Mirrors
DMD Window & Door
Wheat Ridge, COPrice Transparency
Free assessment
Services Offered
Custom Window Designs
Wood Frames
Glass Doors
Energy-Efficient Options
Window Replacement/Installation
Vinyl Frames
Gravina's Window Center of Littleton
Denver, COGood Customer Service
Educational Website
Free assessment
Price Transparency
Services Offered
Wood Frames
Double-Hung
Energy-Efficient Options
Custom Glass
Fiberglass Frames
Glass Doors
Window Replacement/Installation
BlueBird Windows & Doors
Lafayette, COEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Double-Hung
Window Replacement/Installation
Glass Doors
Bay Windows
Energy-Efficient Options
Glass Doctor of Wheat Ridge
Wheat Ridge, COGood Customer Service
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Window Repair
Custom Glass
Glass Showers
Energy-Efficient Options
Glass Repair
Mirrors
United Windows & Siding
Wheat Ridge, COEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Vinyl Frames
Double-Hung
Window Replacement/Installation
Bay Windows
Energy-Efficient Options
Rise Renovation
Denver, COEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Custom Window Designs
Double-Hung
Bay Windows
Colorado Classic Exteriors: Windows, Doors, Pergolas
Arvada, COEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
A&M WINDOW SERVICE
Northglenn, COFree assessment
Educational Website
Price Transparency
Services Offered
Glass Repair
Glass Doors
Window Replacement/Installation
Glass Showers
Energy-Efficient Options
Window Repair
Mirrors
True View Windows & Glass
Westminster, COGood Customer Service
Educational Website
Timely Service
Free assessment
Price Transparency
Services Offered
Window Repair
Window Replacement/Installation
Glass Doors
Mirrors
Glass Showers
Tempered Glass
Discount Windows & Siding, INC
Denver, COPrice Transparency
Free assessment
Good Customer Service
Services Offered
Energy-Efficient Options
Custom Window Designs
Vinyl Frames
Glass Doors
Window Replacement/Installation
Performance Windows
Broomfield, COEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Westminster, 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 Westminster Saves You Money
By upgrading to energy-efficient windows, you can take advantage of several benefits, including:
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes usually have windows that are outdated, leaky or maybe even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.
- Save money on electricity bills: Installing energy-efficient windows lowers your energy bills by about 12% because you need less energy.
- Protect your valuables from fading: When you switch to energy-efficient windows with low-emissivity coatings, your floors, carpets and furniture will be protected from fading due to their ability to filter out damaging UV rays.
- Decrease your carbon footprint: You can reduce your indirect greenhouse gas emissions by about 12% after you install Energy Star certified windows. In Westminster, that’s about 460 pounds per year on average.
Estimated Cost of Window Replacement in Westminster
Let’s take a look at the cost of installing new windows and the kinds of services offered by installers.
How Much Do New Windows Cost?
The average cost to install a single window is about $600 but can range from $200 to $1,200. How much it will cost varies based on several factors, like type, material, number of windows, the location of your home, size and more.
It’s also worth keeping in mind that energy-efficient windows will usually cost more initially, but Energy Star predicts that upgrading the windows on your Westminster home translates to an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 a year for double-pane windows. How much you’ll save by switching to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
We recommend requesting free quotes from several window companies to find the right windows and the company that works best for you.
What Services do Window Installers Offer?
There are generally two types of window installation services: full-frame and pocket installations.
Full-frame installations are necessary when you want a new style or your window has a lot of rot. With this service, your installers will replace the full window, including the frame, sill and trim. A pocket installation involves replacing a window without removing the complete frame, which tends to be less expensive than a full-frame installation.
Your window installation company can advise you on the best type for your project. In Westminster, the choice will mostly be based on the efficiency of your home and the age of your existing frames.
Best Availability
Renewal by Andersen
- Great industry reputation
- 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 Westminster
EcoWatch is different from most reviewers because we examine these companies through a sustainability lens. We have reviewed the best window replacement companies in Westminster mainly based on their energy efficient offerings, as it’s the most sustainable option and the best one for homeowners. Energy-efficient windows can lower power bills by hundreds of dollars. Along with energy efficiency, our rating methodology considers the following factors:
Service Area
Because this is a guide for Westminster, we gave more points to companies that provide services to the city. There are other reputable providers that didn’t make our list because of the low odds that they would serve the average homeowner in Westminster.
Work Quality
We’re willing to bet that you’re looking for professionals who do a great job installing windows. We’ve vetted each company included on this list to ensure its contractors are well-qualified and that the company has received plenty of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed trends in recent online reviews to determine the companies with the most consistent customer satisfaction. Customer satisfaction might be the most important factor, as it reflects the quality of services across most other categories, including quality of parts, quality of installation, professionalism, warranty, cost 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 awarded higher points to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
As discussed previously, windows are a hefty investment, so you’ll want to make sure that investment is well protected. Window installation companies that provide lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have been in the industry for a while. Window installation companies that have more experience will earn higher rankings by our standards. We like to see at least ten years of experience.
Westminster, CO Window Replacement FAQs
What is the average cost to replace windows in a home?
The national average cost of installing a window is about $600 but can range between $200 and $1,200, depending on several factors. The price is often 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 hundreds of dollars a year in energy bills.
What are the most common types of replacement windows?
The most common types of windows for homes are bay windows, awning windows, slider windows, picture windows, double-hung and single-hung windows, casement windows and transom windows.
Can you install your own windows?
If you’re handy and have experience with installing a replacement window, it’s possible to install your own windows. But if you don’t have the time or skills, we don’t recommend trying it.
When is the best time of year to replace windows?
Replacement windows can be installed during any season, but warmer weather is typically better. Regardless of 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 doesn’t necessarily matter that much. What’s most important is that the weather should be dry.