20 Best Window Companies in Littleton, CO (2023 Reviews)
If you're looking to get new windows, our list of the top window installation companies can help.
We analyzed all the top-rated window companies in Littleton and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
The EcoWatch Reviews team is all about finding solutions for eco-conscious homeowners in Littleton. 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 news for the environment, as the additional energy used by old windows increases your carbon footprint.
Unlike other sites, EcoWatch ranks window replacement companies on energy efficiency while also considering cost, customer satisfaction and service area.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Littleton
The EcoWatch team evaluated many window providers in Littleton to find the top ones for our readers. The installers we've mentioned in this article passed our review standards for energy-efficient offerings as well as local expertise, customer service, price and beyond.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World has windows expertise in Littleton. 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.
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 details are not available on Window World’s website, as the cost of window replacement 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. The best way to get more accurate information is to ask for a free quote from the company.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen offers the best availability in Littleton. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window replacement business. Its reputation is backed by several positive reviews on customer review websites.
It has established itself as 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 WindowsRenewal by Andersen caters to eco-conscious consumers by providing energy-efficient window offerings. 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?Pricing details are not available on Andersen’s website since the cost of window installment differs based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. You can inquire about a free quote on its website for more information about pricing.

Universal Windows Direct
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Makes charitable contributions
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Manufactures products in-house
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Wide variety of products and services
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Lifetime warranty
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Limited service area
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Some installations carried out by third-party contractors
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Quality of service will depend on your area
Universal Windows Direct offers the best warranty in Littleton. This company has been in business since 2002 and currently services 27 states nationwide. Its reputation is backed by many positive reviews on customer review websites.
It has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThere are a wide range of window types available from Universal Windows Direct, some of which are Energy Star products. The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products.
How much does Universal Windows Direct cost in Littleton?Universal does not mention 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. If you’d like more accurate information, you can inquire about a quote on the company’s website.
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 Companies in Littleton
Renewal by Andersen Window Replacement
Denver, CO-
Educational Website
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Price Transparency
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Free assessment
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Good Customer Service
Services Offered
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Full-Service Installations
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Sliding Glass
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Commercial Windows
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Double-Hung
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Energy-Efficient Options
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Bay Windows
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Window Replacement
Champion Replacement Windows of Denver
Denver, CO-
Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Double-Hung
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Residential Windows
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Custom Window Designs
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Window Replacement
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Sliding Glass
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Bay Windows
Window World of Denver
Denver, CO-
Free assessment
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Timely Service
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Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Bay Windows
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Stained Glass
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Custom Window Designs
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Residential Windows
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Window Replacement
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Energy-Efficient Options
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Glass Showers
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Double-Hung
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Sliding Glass
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Aluminum Window Frames
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Fast Delivery
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Commercial Windows
Champion Replacement Windows of Colorado Springs
Colorado Springs, CO-
Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Custom Window Designs
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Bay Windows
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Residential Windows
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Double-Hung
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Window Replacement
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Sliding Glass
Champion Replacement Windows of Ft. Collins
Loveland, CO-
Free assessment
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Price Transparency
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Good Customer Service
Services Offered
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Double-Hung
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Custom Window Designs
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Bay Windows
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Residential Windows
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Sliding Glass
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Window Replacement
Window Nation
Aurora, CO-
Good Customer Service
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Price Transparency
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Free assessment
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Educational Website
Services Offered
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Stained Glass
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Custom Window Designs
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Residential Windows
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Bay Windows
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Double-Hung
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Sliding Glass
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Energy-Efficient Options
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Window Replacement
Five Seasons Windows and Doors
Denver, CO-
Timely Service
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Free assessment
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Educational Website
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Price Transparency
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Good Customer Service
Services Offered
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Double-Hung
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Stained Glass
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Bay Windows
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Glass Showers
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Energy-Efficient Options
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Residential Windows
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Window Replacement
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Sliding Glass
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Custom Window Designs
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Commercial Windows
Bellwether Windows, Siding, & Doors
Englewood, CO-
Good Customer Service
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Educational Website
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Price Transparency
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Timely Service
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Free assessment
Services Offered
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Aluminum Window Frames
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Fast Delivery
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Residential Windows
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Double-Hung
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Commercial Windows
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Custom Window Designs
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Window Replacement
JDI Windows
Littleton, CO-
Good Customer Service
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Free assessment
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Price Transparency
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Educational Website
Services Offered
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Bay Windows
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Residential Windows
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Window Replacement
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Double-Hung
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Window Repair
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Custom Window Designs
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Fast Delivery
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Commercial Windows
Gravina's Window Center of Littleton
Littleton, CO-
Price Transparency
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Educational Website
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Free assessment
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Good Customer Service
Services Offered
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Window Replacement
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Double-Hung
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Fast Delivery
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Bay Windows
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Custom Window Designs
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Sliding Glass
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Stained Glass
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Residential Windows
GS Exterior Experts
Littleton, CO-
Free assessment
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Price Transparency
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Educational Website
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Timely Service
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Good Customer Service
Services Offered
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Custom Window Designs
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Fast Delivery
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Window Replacement
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Commercial Windows
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Residential Windows
See The Light Windows
Littleton, CO-
Free assessment
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Glass Showers
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Residential Windows
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Custom Window Designs
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Window Replacement
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Commercial Windows
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Window Repair
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Sliding Glass
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Bay Windows
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Fast Delivery
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Double-Hung
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Energy-Efficient Options
Lakewood Glass and Windows
Lakewood, CO-
Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Double-Hung
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Residential Windows
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Window Replacement
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Custom Window Designs
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Tempered Glass
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Fast Delivery
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Commercial Windows
5280 Exteriors
Centennial, CO-
Free assessment
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Good Customer Service
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Price Transparency
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Timely Service
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Educational Website
Services Offered
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Window Replacement
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Aluminum Window Frames
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Commercial Windows
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Glass Showers
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Residential Windows
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Custom Window Designs
Reflection Windows & Doors
Denver, CO-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Commercial Windows
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Window Repair
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Window Replacement
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Full-Service Installations
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Glass Showers
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Residential Windows
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Custom Window Designs
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Double-Hung
Dreamstyle Remodeling
Denver, CO-
Educational Website
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Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Residential Windows
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Window Replacement
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Bay Windows
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Full-Service Installations
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Double-Hung
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Fast Delivery
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Glass Showers
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Custom Window Designs
Paramount Siding & Windows
Littleton, CO-
Price Transparency
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Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Sliding Glass
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Residential Windows
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Double-Hung
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Bay Windows
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Window Replacement
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Custom Window Designs
Colorado Window Source
Denver, CO-
Free assessment
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Good Customer Service
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Price Transparency
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Timely Service
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Educational Website
Services Offered
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Residential Windows
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Sliding Glass
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Double-Hung
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Fast Delivery
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Custom Window Designs
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Commercial Windows
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Window Replacement
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Glass Showers
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Energy-Efficient Options
CMC Windows and Doors
Centennial, CO-
Good Customer Service
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Price Transparency
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Free assessment
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Educational Website
Services Offered
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Full-Service Installations
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Residential Windows
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Stained Glass
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Window Replacement
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Custom Window Designs
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Double-Hung
HRTI
Greenwood Village, CO-
Educational Website
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Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Full-Service Installations
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Window Replacement
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Custom Window Designs
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Residential Windows
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Double-Hung
Calculate how much you can expect to pay for window installation and replacement in Littleton, 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 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:
- Save on energy bills: The Department of Energy estimates that heat gained or lost via windows accounts for about 25-30% of energy use in your home. Switching to energy-efficient windows can help reduce that number, which helps you save some money on your bills.
- More efficient energy use in your home: Because the summers can get quite hot in Littleton, homeowners usually depend on their air conditioner during that time. Energy-efficient windows decrease how much cool air is lost through your windows, which makes it easier to keep your home cool.
- Protect your investment: Upgrading and repairing your windows is an important part of maintaining your property and its value, particularly if your home is on the older side.
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
Estimated Cost of Window Replacement in Littleton
Each window installer provides various services and has varying costs based on a few factors.
How Much Do New Windows Cost?
Even though the average of replacing a single window is around $600, it can range anywhere from $200 to $1,200. How much it will cost depends on several factors, like type, the location of your home, size, number of windows, material and more.
It's also worth noting that energy-efficient windows will cost more upfront, but Energy Star estimates that upgrading the windows on your Littleton home can mean an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. How much you'll save by switching to energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.
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 Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
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.
When do I need to use a window installation company?
You should use a window installation company whenever you need new windows. Installing windows is a involved process that can be difficult to do on your own, so it's best left to the professionals.
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. Additionally, the weather should be dry, since rain can make the installation harder.