24 Best Window Replacement Companies in Littleton, CO (Mar 2023)
Window Companies Near Me
Thinking about replacing your windows? We've got you covered in this guide to the best window installation companies.
We analyzed all the top window installers in Littleton 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 March 14, 2023
Why you can trust EcoWatch
A review of the top window replacement companies in Littleton may not seem like the most captivating article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might think. Drafty, leaky windows could lead to having higher power bills during the winter or summer months.
That's not great for your bank account or the environment, but one of the best window installation companies can help you with that.
Unlike other sites, EcoWatch ranks window installation companies on energy efficiency while also taking into consideration cost, customer satisfaction and service area.
Best Affordability
Window World
- EnergyStar Partner
- Lifetime warranty
- Low prices relative to competitors
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Manufactures products in-house
- Great industry reputation
- Member of US Green Building Council
- No lifetime warranty
Best Warranty
Universal Windows Direct
- Wide variety of products and services
- Lifetime warranty
- Manufactures products in-house
- Limited service area
Best Window Replacement Companies in Littleton
The EcoWatch Reviews team evaluated dozens of companies that serve the Littleton area to find the top window installation companies by our standards. The providers in this article passed our review standards for energy-efficient offerings as well as local expertise, price, customer service and beyond.

Window World
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EnergyStar Partner
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Lifetime warranty
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Low prices relative to competitors
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Quality of service will depend on your area
Window World has windows expertise in Littleton. This provider has 27 years of experience in the window installation business, and it has established itself as one of the best companies in Littleton.
It has established itself as 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 WindowsThere are a wide variety of window types available from Window World, some of which are Energy Star products. 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 Littleton?Pricing information is not available on Window World's website, as the cost of window replacement differs based 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. You can ask for a free quote on its website for more information about pricing.

Renewal by Andersen
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Manufactures products in-house
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Great industry reputation
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Member of US Green Building Council
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No lifetime warranty
Renewal by Andersen has the best availability in Littleton. Andersen has around 27 years of experience in the window replacement business. The company has a lot 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 WindowsThere are a wide range of window types available from Renewal by Andersen, some of which are Energy Star products. 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 Littleton?Andersen does not detail 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. Receiving a free quote on its website is the best way to know for sure.

Universal Windows Direct
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Wide variety of products and services
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Lifetime warranty
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Manufactures products in-house
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Limited service area
Universal Windows Direct has the best warranty in Littleton. Universal has about 20 years of experience in the window installation sector. Hundreds of positive reviews from customers online back the provider's reputation.
You may want to consider picking 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 WindowsUniversal Windows Direct's commitment to sustainability shows in its energy-efficient window offerings. 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 Littleton?Universal doesn't have any prices displayed 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. Getting a free quote on its website is the best way to get more accurate information.
Please note that the companies in this section are national, which means the quality of customer service may vary depending on your local team. We have tried to remain unbiased and transparent by including both pros and cons for every provider.
More Window Replacement Companies in Littleton
Storm Guard of South Metro Denver
Parker, CO-
Award-Winning
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Good Customer Service
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Helps Educate Customers
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Free Quotes
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 Windows
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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
The Glass Guru
Arvada, CO-
Dependable Service
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Excellent Customer Service
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Price Transparency
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Locally Recognized for Quality
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-
Consistent Workmanship
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Award-Winning
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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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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-
Dependable Service
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No-Hassle Pricing
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No-fee Quotes
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Arrives on Time
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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Commercial Windows
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Double-Hung
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Sliding Glass
Commercial Storefront Glass Denver
1555 Larimer St, CO-
Excellent Customer Service
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No-Hassle Pricing
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Dependable Service
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Educational Website
Services Offered
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Fast Delivery
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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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Commercial Windows
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Double-Hung
True View Windows & Glass
Westminster, CO-
Reliable Appointment Windows
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Excellent Customer Service
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Dependable Service
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Educational Website
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 Windows
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Business Windows
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Double-Hung
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Sliding Glass
CMC Proudly Offering Marvin Windows and Doors
Centennial, CO-
Free Quotes
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Good Customer Service
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Reliable Service
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Educational Website
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
Binswanger Glass
Castle Rock, CO-
Good Customer Service
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Price Transparency
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Helps Educate Customers
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Timely Service
Services Offered
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Residential Windows
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Glass Showers
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Doors
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Custom Window Designs
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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
Five Seasons Windows and Doors
Denver, CO-
Excellent Customer Service
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Educational Website
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Arrives on Time
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No-fee Quotes
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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Double-Hung
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Sliding Glass
Alpen High Performance Products
Louisville, CO-
Educational Website
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No-fee Quotes
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Price Transparency
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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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Energy-Efficient Options
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Custom Windows
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Commercial Windows
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Double-Hung
Colorado Rockies Windows and Doors
Golden, CO-
Good Customer Service
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Price Transparency
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No-fee Quotes
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Dependable 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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Business Windows
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Double-Hung
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Sliding Glass
Ameritech Windows
Boulder, CO-
Excellent Customer Service
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Price Transparency
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Locally Recognized for Quality
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Timely Service
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-
Reliable Appointment Windows
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Price Transparency
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Good Customer Service
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Educational Website
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-
Dependable Service
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Free Quotes
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Helps Educate Customers
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Excellent Customer Service
Services Offered
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Tempered Glass
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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
Ken Caryl Glass, Inc.
Mead Way, CO-
Consistent Workmanship
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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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Residential Windows
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Doors
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Custom Windows
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Business Windows
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Sliding Glass
303 WINDOWS
Denver, CO-
Arrives on Time
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Free Quotes
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Helps Educate Customers
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Dependable Service
Services Offered
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Fast Delivery
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Energy-Efficient Options
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Custom Windows
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Double-Hung
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Sliding Glass
Sky Manor Roofing & Exteriors
Thornton, CO-
Educational Website
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Good Customer Service
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No-fee Quotes
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Price Transparency
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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Business Windows
Reliable Glazing
Denver, CO-
Timely Service
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Free Quotes
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Educational Website
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No-Hassle Pricing
Services Offered
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Residential Windows
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Tempered Glass
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Custom Window Designs
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Business Windows
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Double-Hung
Mountain View Window & Door
Denver, CO-
No-Hassle Pricing
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Award-Winning
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Good Customer Service
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Consistent Workmanship
Services Offered
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Residential Windows
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Fast Delivery
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Custom Windows
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Business Windows
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Double-Hung
Colorado Classic Exteriors: Windows, Siding, Doors, Pergolas
Arvada, CO-
Good 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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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-
Good Customer Service
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Price Transparency
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Timely Service
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Consistent Workmanship
Services Offered
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Custom Windows
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Sliding Glass
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Double-Hung
Absolute Glass & Windows LLC
Aurora, CO-
Good Customer Service
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Reliable Service
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Price Transparency
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Helps Educate Customers
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
Slade Glass Co.
Boulder, CO-
Gives to charity
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Price Transparency
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Good Customer Service
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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 Window Designs
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Aluminum Window Frames
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Commercial Windows
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Sliding Glass
Alpha Glass and Window, LLC
Englewood, CO-
Educational Website
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Locally Recognized for Quality
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No-fee Quotes
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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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Custom Window Designs
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Business Windows
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Double-Hung
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Sliding Glass
How Installing Energy-Efficient Windows in Littleton Saves You Money
Switching to energy-efficient windows can help improve the comfort of your home and help you save on energy bills. Here are more ways switching out your windows could benefit you:
- Reduce your carbon footprint: Decreasing how much energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by 460 pounds per year on average.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
- Save on power bills: According to the Department of Energy, heat gained or lost through windows accounts for about 25-30% of residential energy use. Installing energy-efficient models can help reduce that amount, therefore saving you about 12% more on your bills.
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes tend to have windows that are outdated, drafty or maybe even damaged in some way. Upgrading your windows could help raise the value of your home if you decide to sell.
Estimated Cost of Window Replacement in Littleton
Let's go over the cost of updating your windows and the kinds of services offered by installers.
How Much Do New Windows Cost?
Typically, Littleton homeowners can expect their window replacements to range from $250 to $1,200. The average cost sits at around $600. How much it will cost depends on several factors, such as size, material, number of windows, the location of your home, type and more.
It's important to bear in mind that windows with the best efficiency may cost more initially but can save you hundreds of dollars via returns on your energy bills. Investing in Energy Star certified windows can save Littleton homeowners $443+ a year when replacing single-pane windows.
We recommend getting free quotes from several window installation companies to find the one that works best for your budget.
What Services do Window Installers Offer?
When it comes to window replacements, there are typically two kinds that your installer will offer: full-frame and pocket installations.
A full-frame installation replaces the complete window, including the sill, frame, trim and the window panes. Because this type of installation requires more time, it will cost more than a pocket installation. Pocket installations are simpler and won't cost as much, as they involve merely replacing the window within its existing frame. But if the frame has any damage, you should opt for a full-frame installation instead.
If you're unsure which type of window installation service you should get, your installer should be able to help you out. In general, the decision is influenced by factors such as the age and condition of the home, the type of building material, budget and time restrictions.
Best Affordability
Window World
- EnergyStar Partner
- Lifetime warranty
- Low prices relative to competitors
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Manufactures products in-house
- Great industry reputation
- Member of US Green Building Council
- No lifetime warranty
Best Warranty
Universal Windows Direct
- Wide variety of products and services
- Lifetime warranty
- Manufactures products in-house
- Limited service area
How We Choose the Best Window Installers in Littleton
EcoWatch reviews are different from most reviews, as we evaluate these companies through a sustainability lens. We have reviewed the best window replacement companies in Littleton mainly based on their energy efficient offerings, 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 takes the following factors into consideration:
Service Area
Because this is a guide for Littleton, we only included companies that cover the city. There are certainly reputable providers that didn't make the cut because of the low odds that they would serve the average homeowner in Littleton.
Work Quality
We're willing to bet that you're not looking for a company to do a shoddy job installing windows. We've vetted each company in our guide to ensure its technicians are well-qualified and that the company has gotten tons of positive customer feedback to vouch for its service.
Customer Reviews
Customer feedback is another super important review factor. If most customers don't have positive feedback about their service from a certain window installation company, it won't be featured on EcoWatch.
Cost
Cheaper windows don't necessarily mean better windows, but we know many of our readers try to keep costs low when possible. When analyzing the prices of providers, we awarded 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. For that reason, window installation companies that give you 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 installers that have more experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.
Littleton, CO Window Replacement FAQs
How much does window installation cost?
The average cost of replacing a window ranges from $450 to $650. There are many factors that affect how much it costs, which include the materials used in designing the windows, local labor costs, styles and sizes of windows, how energy-efficient the windows are, the number of windows and your property's location.
Which type of window should I get?
Generally, double-pane windows will be more efficient than single-pane windows and windows that don't open will be more efficient than windows that do. To be sure you'll have the most energy-efficient windows, look for models with the blue Energy Star certification — this means they're certified energy-efficient by the U.S. Department of Energy.
Can you replace your own windows?
Although it is possible to install your own windows, doing so is time-consuming and requires a lot of experience with home improvement projects. Hiring a professional can help ensure that the job is done properly and that you won't have to spend the time and effort to do it yourself.
When is the best time of year to replace windows?
While you can install windows any time of year, warmer weather is often better for installing replacement windows. In addition, the weather should be dry, because rain can make the installation harder.
Should I replace my windows all at the same time?
If you're upgrading your windows to save on your energy bills, replacing all of your windows at the same time is the only way to gain that benefit. On the other hand, if you have just one or two windows that are damaged or drafty, you can replace just those.