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10 Best Window Companies in Denver, CO

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Written By David Cusick

Last Updated February 2024

Whether you're tackling home renovation projects or are simply in need of a change, upgrading your windows is a great plan. Your windows play a crucial role in your home's value and its energy efficiency. Damaged or outdated windows can cost you in power bills — about an extra $290 a year in Denver. The Department of Energy estimates that 25–30% of your house’s heat or cool air could be lost through your windows. Picking the best company for you is a big decision. That's why we've put together this list of the top window installation companies in Denver.

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Top 10 Best Window Companies in Denver

Renewal by Andersen Window Replacement

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1401 W Bayaud Ave #7, Denver, CO 80223 (720) 263-7039 renewalbyandersendenver.com

Price transparency

Free assessment

Good customer service

Educational website

Services Offered

Window install & replacement
Custom window designs
Energy-efficient options
Andersen
Sliding glass doors
Vinyl frames
Bay windows

Champion Replacement Windows of Denver

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10035 E 40th Ave Suite 400, Denver, CO 80238 (303) 800-2129 championwindow.com

Price transparency

Free assessment

Good customer service

Services Offered

Storm doors
Window repair
Window install & replacement
Bay windows
Double-hung
Sliding glass doors

Champion Replacement Windows of Ft. Collins

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5850 Byrd Dr, Loveland, CO 80538 (970) 744-2604 championwindow.com

Price transparency

Good customer service

Free assessment

Services Offered

Window repair
Window install & replacement
Bay windows
Double-hung
Storm doors
Sliding glass doors

Champion Replacement Windows of Colorado Springs

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4610 N Chestnut St, Colorado Springs, CO 80907 (719) 344-2661 championwindow.com

Price transparency

Good customer service

Free assessment

Services Offered

Bay windows
Sliding glass doors
Storm doors
Double-hung
Window install & replacement
Window repair

Window World of Denver

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480 E 76th Ave Bldg 5E, Denver, CO 80229 (303) 574-9594 windowworldcolorado.com

Price transparency

Free assessment

Timely service

Good customer service

Educational website

Services Offered

Bay windows
Glass doors
Sliding glass doors
Double-hung
Window install & replacement
Energy-efficient options
Custom window designs

Window Replacement Denver

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1480 N Humboldt St, Denver, CO 80218 (720) 701-2202 windowreplacementdenver.com

Price transparency

Good customer service

Free assessment

Educational website

Services Offered

Commercial windows
Window install & replacement
Glass doors
Window repair
Pella
Fiberglass frames
Double-hung
Custom window designs
Sliding glass doors
Vinyl frames
Andersen
Aluminum frames

Bellwether Windows, Siding, & Doors

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1555 W Thomas Ave, Englewood, CO 80110 (303) 323-8578 bellwetherhomes.com

Timely service

Educational website

Good customer service

Free assessment

Price transparency

Services Offered

Simonton
Vinyl frames
Aluminum frames
Window repair
Wood frames
Pella
Milgard
Fiberglass frames
Window install & replacement

United Windows & Siding

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12090 Ridge Rd Unit B, Wheat Ridge, CO 80033 (720) 535-4767 unitedwindowsandsiding.com

Educational website

Good customer service

Price transparency

Free assessment

Services Offered

Simonton
Marvin
Milgard
Window install & replacement
Kolbe
Alside
Bay windows
Andersen
Vinyl frames
Sliding glass doors
Aluminum frames
Pella

CWS Exteriors, Windows & Siding

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1309B W Alameda Ave, Denver, CO 80223 (720) 727-6031 coloradowindowsource.com

Good customer service

Free assessment

Timely service

Price transparency

Educational website

Services Offered

Wood frames
Milgard
Fiberglass frames
Energy-efficient options
Window install & replacement
Vinyl frames
Custom window designs
Commercial windows
Sliding glass doors

True View Windows & Glass

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3200 W 71st Ave #20, Westminster, CO 80030 (720) 431-8783 trueviewglass.com

Educational website

Free assessment

Good customer service

Price transparency

Timely service

Services Offered

Window install & replacement
Commercial windows
Glass showers
Glass repair
Pella
Mirrors
Milgard
Sliding glass doors
Window repair
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on window companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How Much Does Window Installation Cost In Denver?

The cost of window installation or replacement will be influenced by several factors, including how difficult your windows are to access or install, the number and size of the windows, and the materials you choose. On average, homeowners in Denver should expect to spend about $280 per window*. Below are additional cost breakdowns. *Cost data based on sample pricing for window installation from multiple retailers and adjusted for local cost of living.

When To Replace Windows

Installing new energy-efficient windows can significantly enhance your home's appearance, value, insulation, noise reduction, and comfort. Some clear indicators it's time to invest in new windows include the following:

  • Fogging between window panes, condensation issues, or rotting window frames that allow moisture intrusion into the home.
  • Drafts and cold air leaking in through old, loose-fitting windows.
  • High energy bills and a chilly house from poor insulation around windows.
  • Windows that are difficult to open, close, or lock properly due to age and wear.
  • Outdated and inefficient window styles that take away from your house's curb appeal.

How To Choose a Window Company

For a successful window replacement, you need to hire an installation contractor with proven expertise. Below, we outline the most important criteria for picking a window installer.

Experience

Look for well-established local companies with a long track record of experience successfully installing all types of windows. These providers are more likely to understand Denver's climate and your requirements. Ask for references from recent clients to confirm the quality of a company's work.

Certifications

Choose companies that have certifications from major window brands, and that have Fenestration and Glazing Industry Alliance (formerly AAMA) certification. Certification means they've been properly trained in installation best practices. Make sure installers are staff rather than subcontractors, and confirm the technicians doing your job are certified.

Reputation

Take time to read online reviews, check the Better Business Bureau (BBB), and request local references. Review customer feedback to confirm that the company consistently delivers good workmanship and service. Steer clear of companies with complaints of shoddy or unfinished work.

Process

A reputable window installer will be able to provide a complete project plan, precise timelines, clear expectations, and an overview of all material and installation options. Avoid companies that provide unclear quotes or schedules. Look for consistent contact through the whole process to avoid surprises further into the project.

Warranties

Look into window installers that provide installation guarantees on labor and materials. This demonstrates confidence in their work. Seek out companies with unlimited lifetime warranties that can be transferred to new homeowners.

Materials

Ensure that a company works with durable, energy-efficient window brands that work with your budget. Look for enhanced UV protection, design flexibility, and good energy ratings. Confirm the window materials have their own manufacturer warranties as well.

Frequently Asked Questions About Window in Denver, CO

In Denver, the best time to install windows is when temperatures are mild, generally in the spring or fall. These conditions enable installers to do their work with less worry about the weather.

The best type of replacement windows for your Denver home depends on the year your home was built –the average house in Denver was built around 1974. If your home was built a while ago, you may want to consider efficient windows such as double-glazed windows, which are designed to keep your home cool in the summer and warm in the winter. Wood frames also have a timeless look that's great for older homes. For more modern homes, you might want to consider vinyl windows, which are durable, affordable and have a modern look.

The most expensive windows are double-hung windows. They are more intricate than single-hung windows, which makes them more costly. Single-hung windows are the least expensive on the market. Aluminum and vinyl are the most affordable frame options.

It depends on your specific needs and budget, but generally it's recommended to replace all your windows at once if they're not energy efficient. Replacing all your windows at once guarantees that you'll get the most out of your energy efficiency and can potentially save you money in the long run. This is important in Denver, where the average energy bills are roughly $968 a year.

After window installation, it's important to check for any air leaks and make sure the windows are properly sealed. You should also clean the windows regularly to prevent debris from accumulating and causing damage. Additionally, you should inspect the window sills and frames regularly to make sure that the seals are not deteriorating or cracking.

Yes, many window companies offer payment plans for their services. Different companies have different financing options, so you should shop around to find the best option for you. Depending on your income level, which is a median of $78,177 a year in Denver, you may be able to qualify for special payment plans.

Getting windows installed by a professional can provide a number of benefits. Professional installers can ensure that your windows are properly fitted, weatherproofed, and insulated, minimizing air leakage and maximizing energy efficiency. Professional installers are also well-equipped with the necessary tools and techniques to get the job done, which can save you time and money.

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