24 Best Window Replacement Companies in Westminster, CO (Feb 2023)
Window Companies Near Me
Thinking about improving your property's value? The best window replacement companies can help.
We analyzed all the top window installers in Westminster and selected the top 24 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 January 12, 2023
Why you can trust EcoWatch
Whether you're doing home renovations or have windows that need repairs, windows play a important role in conserving your home's energy. Potential leaks or drafts from your windows can make your AC or heater work extra hard in the summer or winter.
Replacement windows improve your home's insulation, not only making you more comfortable during extreme temperatures, but also saving you money and helping the environment.
So if you're building a new home, renovating or updating your windows in Westminster, this is the best place to get started.
Best Affordability
Window World
- Low prices relative to competitors
- Great industry reputation
- EnergyStar Partner
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Award-winning company
- Manufactures products in-house
- Member of US Green Building Council
- No lifetime warranty
Best Warranty
Universal Windows Direct
- Makes charitable contributions
- Lifetime warranty
- Manufactures products in-house
- Quality of service will depend on your area
Best Window Replacement Companies in Westminster
The EcoWatch team assessed many window installation companies across Westminster to narrow our list down to the top ones. The installers in this article passed our review standards for energy-efficient offerings as well as customer service, local expertise, price and beyond.

Window World
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Low prices relative to competitors
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Great industry reputation
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EnergyStar Partner
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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. Window World has been in the window industry for about 27 years.
You may want to consider picking 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 appeals to eco-conscious consumers by providing energy-efficient window offerings. 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 Westminster?Pricing details are not available on Window World's website because the cost of window installment depends on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. Requesting a free quote on its website is the best way to know for sure.

Renewal by Andersen
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Award-winning company
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Manufactures products in-house
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Member of US Green Building Council
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No lifetime warranty
Renewal by Andersen offers the best availability in Westminster. This company has 27 years of experience in the windows industry, and it has proved to be one of the most reputable companies in Westminster. Its reputation is backed by hundreds of positive reviews from customers online.
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, Andersen may be the company for you.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to ask for 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 Westminster?Andersen doesn't have any cost information 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. The best way to get more accurate information is to request a free quote from the company.

Universal Windows Direct
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Makes charitable contributions
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Lifetime warranty
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Manufactures products in-house
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Quality of service will depend on your area
Universal Windows Direct provides the best warranty in Westminster. Universal has over 20 years of experience in the windows industry, and it currently serves 27 states nationwide. Hundreds of positive reviews from customers online back the provider's reputation.
You may want to consider opting for Universal if you're looking for a installer that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThe 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. Not all of Universal's windows are Energy Star certified, so be sure to mention that you'd like Energy Star windows when inquiring.
How much does Universal Windows Direct cost in Westminster?Universal does not detail prices on its website, but 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 request a free quote on its website for more information about the cost.
We aim to stay unbiased and transparent by including pros and cons for every company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Replacement Companies in Westminster
Storm Guard of South Metro Denver
Parker, CO-
Arrives on Time
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Educational Website
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No-fee Quotes
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Consistent Workmanship
Services Offered
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Residential Windows
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Architectural Glass
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Fast Delivery
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Energy-Efficient Options
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Custom Window Designs
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
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Stained Glass
The Glass Guru
Arvada, CO-
Reliable Appointment Windows
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No-Hassle Pricing
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Educational Website
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Good Customer Service
Services Offered
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Residential Windows
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Glass Showers
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Tempered Glass
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Custom Window Designs
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Aluminum Window Frames
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Full-Service Installations
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Business Windows
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Double-Hung
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Sliding Glass
Storm Guard North Metro Denver
Brighton, CO-
Locally Recognized for Quality
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Consistent Workmanship
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Educational Website
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Arrives on Time
Services Offered
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Residential Windows
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Architectural Glass
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Fast Delivery
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Energy-Efficient Options
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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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Stained Glass
Window World of Denver
Denver, CO-
Good Customer Service
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Award-Winning
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Free Quotes
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No-Hassle Pricing
Services Offered
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Energy-Efficient Options
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Custom Windows
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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
Commercial Storefront Glass Denver
1555 Larimer St, CO-
Reliable Service
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Arrives on Time
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No-Hassle Pricing
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Excellent Customer Service
Services Offered
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Fast Delivery
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Custom Windows
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Aluminum Window Frames
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Full-Service Installations
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Commercial Windows
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Double-Hung
Northern Lights Exteriors
Fort Lupton, CO-
Educational Website
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Free Quotes
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Dependable Service
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Locally Recognized for Quality
Services Offered
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Residential Windows
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Architectural Glass
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Custom Window Designs
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Full-Service Installations
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Business Windows
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Sliding Glass
True View Windows & Glass
Westminster, CO-
Consistent Workmanship
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Arrives on Time
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No-Hassle Pricing
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Excellent Customer Service
Services Offered
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Residential Windows
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Architectural Glass
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Glass Showers
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Custom Window Designs
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Commercial Windows
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Double-Hung
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Sliding Glass
CMC Proudly Offering Marvin Windows and Doors
Centennial, CO-
Helps Educate Customers
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Price Transparency
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Dependable Service
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Excellent Customer Service
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Sliding Glass
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Aluminum Window Frames
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Energy-Efficient Options
Hillcrest Glass
Longmont, CO-
Free Quotes
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Reliable Service
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Excellent Customer Service
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No-Hassle Pricing
Services Offered
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Residential Windows
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Glass Showers
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Heavy Glass
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Custom Window Designs
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Full-Service Installations
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Commercial Windows
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Double-Hung
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Sliding Glass
Five Seasons Windows and Doors
Denver, CO-
Timely Service
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Dependable Service
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No-Hassle Pricing
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Free Quotes
Services Offered
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Residential Windows
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Alpen High Performance Products
Louisville, CO-
Helps Educate Customers
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Consistent Workmanship
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Excellent Customer Service
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No-fee Quotes
Services Offered
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Residential Windows
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Architectural Glass
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Energy-Efficient Options
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Custom Windows
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Business Windows
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Double-Hung
Colorado Rockies Windows and Doors
Golden, CO-
No-Hassle Pricing
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Excellent Customer Service
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Consistent Workmanship
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Arrives on Time
Services Offered
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Residential Windows
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Energy-Efficient Options
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Custom Window Designs
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
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Sliding Glass
Ameritech Windows
Boulder, CO-
Award-Winning
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Excellent Customer Service
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Free Quotes
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Arrives on Time
Services Offered
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Custom Windows
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Residential Windows
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Energy-Efficient Options
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Double-Hung
GS Exterior Experts
Littleton, CO-
Educational Website
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Good Customer Service
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Award-Winning
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Arrives on Time
Services Offered
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Custom Window Designs
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Residential Windows
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Commercial Windows
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Double-Hung
United Windows Pro - Windows and glass repair
Aurora, CO-
Helps Educate Customers
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Reliable Appointment Windows
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Free Quotes
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Price Transparency
Services Offered
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Tempered Glass
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Custom Windows
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Business Windows
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Double-Hung
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Sliding Glass
Ken Caryl Glass, Inc.
Mead Way, CO-
Good Customer Service
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Educational Website
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Reliable Appointment Windows
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Free Quotes
Services Offered
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Residential Windows
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Doors
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Custom Window Designs
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Commercial Windows
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Sliding Glass
303 WINDOWS
Denver, CO-
Educational Website
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Excellent Customer Service
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No-fee Quotes
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Timely Service
Services Offered
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Fast Delivery
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Energy-Efficient Options
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Custom Window Designs
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Double-Hung
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Sliding Glass
Sky Manor Roofing & Exteriors
Thornton, CO-
Free Quotes
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Good Customer Service
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Helps Educate Customers
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Arrives on Time
Services Offered
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Residential Windows
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Energy-Efficient Options
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Custom Window Designs
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Aluminum Window Frames
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Business Windows
Reliable Glazing
Denver, CO-
Educational Website
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Timely Service
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Dependable Service
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Free Quotes
Services Offered
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Residential Windows
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Tempered Glass
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Custom Windows
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Business Windows
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Double-Hung
Mountain View Window & Door
Denver, CO-
Excellent Customer Service
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Consistent Workmanship
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Award-Winning
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Helps Educate Customers
Services Offered
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Residential Windows
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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
Colorado Classic Exteriors: Windows, Siding, Doors, Pergolas
Arvada, CO-
Excellent Customer Service
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Dependable Service
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Free Quotes
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No-Hassle Pricing
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Sliding Glass
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Energy-Efficient Options
Lifetime Windows & Siding
Denver, CO-
Timely Service
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Dependable Service
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Helps Educate Customers
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Price Transparency
Services Offered
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Custom Window Designs
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Sliding Glass
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Double-Hung
Slade Glass Co.
Longmont, CO-
No-Hassle Pricing
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Supports Charities
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Helps Educate Customers
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Good Customer Service
Services Offered
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Residential Windows
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Commercial Windows
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Sliding Glass
Absolute Glass & Windows LLC
Aurora, CO-
Excellent Customer Service
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No-Hassle Pricing
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Educational Website
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No-fee Quotes
Services Offered
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Residential Windows
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Architectural Glass
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Custom Window Designs
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Aluminum Window Frames
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Commercial Windows
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Sliding Glass
How Installing Energy-Efficient Windows in Westminster Saves You Money
There are several perks of switching to energy-efficient windows. Some reasons you may want to consider making the switch include the following:
- 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 harmful UV rays.
- Protect your investment: The older your home is, the more likely it is that switching to energy-efficient windows will benefit you. Older homes usually have windows that are outdated, leaky or maybe even damaged in some way. Upgrading your windows could help raise the value of your home if you decide to sell.
- Save money on energy bills: After 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 house.
- Decrease your carbon footprint: Reducing the amount of energy you use also lowers your carbon emissions. You could reduce it by about 460 pounds.
Estimated Cost of Window Replacement in Westminster
Let's take a look at the cost of replacing your windows and the types of services offered by installers.
How Much Do New Windows Cost?
On average, Westminster homeowners can anticipate their window replacements to range from $250 to $1,200. The average cost sits at approximately $600. But costs vary considerably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also offer door installations, which will add extra costs to your project.
It's important to bear in mind that windows with higher efficiency may cost more initially but can save you hundreds of dollars via returns on your energy bills. Investing in certified energy-efficient windows can save Westminster homeowners $375+ a year when replacing single-pane windows.
Costs will also vary based on the material you pick for your window frames. Aluminum frames are the least expensive. They're sturdy, light and maintenance-free, but offer poor insulation. Vinyl frames are somewhat expensive and offer good insulation. Composite frames made with wood fibers encased in plastic also offer good insulation and are moderately expensive. Wood frames cost the most and are the most in-demand. They're also aesthetically pleasing and offer decent insulation for your home.
What Services do Window Installers Offer?
The first thing to ask yourself when planning on installing new windows is: Do you want a full-frame installation or a pocket installation?
Full-frame installations are necessary when you want a new style or your window has significant rot or deterioration. With this service, your professionals will replace the full window, including the sill, trim and frame. Pocket installations (or retrofits) entail replacing a window within its existing frame, which makes pocket installations take less time and therefore cost less. However, if the frame has any damage or rot, you will likely need a full-frame installation instead.
If you're hiring a reputable window installation company, your company can advise you on the best type for your project. In Westminster, the decision will mostly depend on the efficiency of your home and the age of your existing frames.
Best Affordability
Window World
- Low prices relative to competitors
- Great industry reputation
- EnergyStar Partner
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Award-winning company
- Manufactures products in-house
- Member of US Green Building Council
- No lifetime warranty
Best Warranty
Universal Windows Direct
- Makes charitable contributions
- Lifetime warranty
- Manufactures products in-house
- Quality of service will depend on your area
How We Choose the Best Window Installers in Westminster
In our search to make your home improvements easier and more eco-friendly in Westminster, the EcoWatch team landed on the above companies as the best window installation companies in the city. Along with energy efficiency, we evaluated several window installers in Westminster and assigned rankings based on the following methodology:
Service Area
Since this is a guide for Westminster, we only included companies that cover the city. There are certainly reputable providers that didn't make the list because they wouldn't be able to serve homeowners in Westminster.
Work Quality
When installing new windows, the quality and range of services can often play just as important of a role in insulation and performance as the type of window you get. We do give window installers more points if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent customer feedback to determine the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction may be the most important factor, as it reflects the quality of services across nearly every category, including warranty, professionalism, quality of parts, quality of installation, cost and more.
Cost
This one is a give-and-take: similar to other services, cheap window companies are not going to provide the highest quality service. Still, we want to make sure we're highlighting companies that provide a range of price and financing options so they're accessible to most homeowners.
Warranty
As discussed, windows are a substantial investment, so you'll want to be certain that investment is well protected. Window installation companies that offer lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Due to Westminster's climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of Westminster window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Westminster, CO Window Replacement FAQs
How much does a window install cost?
The national average cost to replace a single window is about $600 but can range between $200 and $1,200, depending on several factors. The price is usually influenced by the type and material of the window, the size 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 kind of window is the best for energy efficiency?
Generally, double-pane windows will be more efficient than single-pane windows and windows that do not open will be more efficient than windows that do. If you want to be sure you're getting the most energy-efficient windows, look for models that have the blue Energy Star certification attached to them — this means they're certified energy-efficient by the U.S. Department of Energy.
Can you install your own windows?
If you're handy and have the time and patience to do the job right, you may be able to install your own windows. But if you don't have the time or experience, we recommend hiring a professional.
What time of year is a good time to replace my windows?
Even though you can install windows any time of year, warmer weather is often better for replacing windows. Additionally, it shouldn't be raining, since rain can make the installation harder.
When is it time to replace your windows?
Windows usually last 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.