10 Best Window Replacement Companies in Denver, CO

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Last Updated: February 25, 2025

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 Damaged or outdated windows can cost you in power bills — about an extra $290 a year in Denver.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 home’s heat or cool air could be going out your windows. Our guide to the top window installers in Denver will help you select the best installer for you.

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Top Pick
4.1/5
  • Great quality
  • Free assesment
  • Timely Service
Best Customer Service
4.3/5
  • Great customer service
  • Transparent pricing
  • Award winning company
Most Customizable
4.0/5
  • Holds high customer ratings
  • Offers energy-efficient products
  • Provides a lifetime labor warranty

Top 10 Best Window Replacement Companies in Denver

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

Renewal by Andersen Window Replacement

Renewal by Andersen Window Replacement Logo

Our Rating

User Rating

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

Educational website

Good customer service

Hassle-free window replacement

Also offers door installation and replacement

Free assessment

Comprehensive 20-year warranty

Price transparency

Services Offered

Custom window designs
Window replacement/installation
Energy-efficient options
Double-hung
Vinyl frames
Glass doors
Bay windows

Champion Replacement Windows of Ft. Collins

Champion Replacement Windows of Ft. Collins Logo

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User Rating

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

Price transparency

Price you're quoted is the price you pay

Free assessment

Good customer service

Products made in the usa

Energy star® certified

Services Offered

Window replacement/installation
Double-hung
Bay windows
Glass doors

Champion Replacement Windows of Colorado Springs

Champion Replacement Windows of Colorado Springs Logo

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User Rating

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

Free assessment

Price transparency

Good customer service

Services Offered

Window replacement/installation
Glass doors
Bay windows
Double-hung

Champion Replacement Windows of Denver

Champion Replacement Windows of Denver Logo

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

Free assessment

Price transparency

Good customer service

Services Offered

Bay windows
Glass doors
Window replacement/installation
Double-hung

Power Home Remodeling

Power Home Remodeling Logo

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User Rating

7304 S Joliet St #100, Centennial, CO 80112 (303) 357-2484 powerhrg.com

Free assessment

Good customer service

Timely service

Price transparency

Services Offered

Energy-efficient options
Window replacement/installation

DaBella

DaBella Logo

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User Rating

3225 Austin Bluffs Pkwy suite 200, Colorado Springs, CO 80917 (709) 700-6972 dabella.us

Good customer service

Customized to your home

Timely service

Wide range of styles

Triple-pane vinyl windows

Services Offered

Double-hung
Window replacement/installation
Glass doors
Vinyl frames

The Glass Guru

The Glass Guru Logo

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User Rating

6712 N Franklin Ave, Loveland, CO 80538 (970) 294-7856 theglassguru.com

Good customer service

Free assessment

Educational website

Services Offered

Window repair
Glass doors
Tempered glass
Metal frames
Storm/impact windows
Wood frames
Triple pane glass
Custom glass
Energy-efficient options
Fiberglass frames
Screen repair
Mirrors
Skylights
Window replacement/installation
Glass repair
Vinyl frames
Glass showers

United Windows Pro - Windows and glass repair

United Windows Pro - Windows and glass repair Logo

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User Rating

4515 S Nepal Ct, Aurora, CO 80015 (720) 400-2929 unitedwindowspro.com

Good customer service

Educational website

Price transparency

Financing options available

Free assessment

Commercial and residential

Timely service

Fast emergency response

Services Offered

Window replacement/installation
Energy-efficient options
Glass doors
Tempered glass
Glass repair
Window repair
Wood frames
Triple pane glass

Judd's Glass & Mirror of Colorado Springs

Judd's Glass & Mirror of Colorado Springs Logo

Our Rating

User Rating

258 W Rockrimmon Blvd, Colorado Springs, CO 80919 (719) 687-3895 juddsglasscoloradosprings.com

Educational website

Flexible financing

Free assessment

Price transparency

Local business

Good customer service

Offers free leftover glass

Services Offered

Mirrors
Energy-efficient options
Window replacement/installation
Window repair
Tempered glass
Glass repair
Glass showers
Glass doors

Lifetime Windows & Siding

Lifetime Windows & Siding Logo

Our Rating

User Rating

9525 E 40th Ave Unit 160A, Denver, CO 80238 (303) 536-8809 lifetimewindows.com

Free assessment

Price transparency

Educational website

Infinity by marvin windows

Durable and efficient upgrades

Good customer service

Free consultation

Services Offered

Energy-efficient options
Custom window designs
Fiberglass frames
Glass doors
Window replacement/installation
Glass showers
Double-hung
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on window replacement 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?

Window installation and replacement costs vary based on 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

Adding new energy-efficient windows can substantially enhance your home's noise reduction, comfort, appearance, value, and insulation. Clear indicators that it's time to invest in new windows include the following:

  • Condensation issues, fogging between window panes, or rotting window frames that allow moisture intrusion into the home.
  • Cold air and drafts coming in from old, loose-fitting windows.
  • Discomfort and high energy bills from poor insulation around windows.
  • Windows that are hard to open, close, or lock properly due to wear and age.
  • Outdated and inefficient window styles that detract from your home’s curb appeal.

How To Choose a Window Company

For a successful window replacement, you want to locate an installer with proven expertise. Below, we cover the most important qualifications for selecting a window installer.

Experience

Look for well-established local companies with many years, ideally decades, 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

Look for installers that are backed by top window manufacturers and certified by leading industry groups, including the Fenestration and Glazing Industry Alliance, formerly known as the AAMA. Appropriate credentials mean that a provider has gotten proper training in quality installation methods. Ensure installers are employees, not subcontractors. Verify that any technicians working on your home have the right certifications.

Reputation

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

Process

The highest-quality window installers will supply a detailed project plan and schedule, clear expectations, and an overview of material and installation options. Avoid companies that offer unclear quotes or timelines that don't provide specifics upfront. Look for ongoing contact throughout the process to avoid surprises later in the project.

Warranties

Seek out window firms that offer assurances on their installations, and that provide warranties on products and labor. This shows confidence in their work. Also seek out unlimited lifetime warranties that can be transferred to new homeowners.

Materials

Confirm that a window installer offers durable, long-lasting windows and leading energy-efficient window bands that fit your budget. Research choices with design flexibility, enhanced UV protection, and good energy ratings. Verify that the materials come with their own manufacturer warranties.

Frequently Asked Questions About Window in Denver, CO

In Denver, the optimal time to install windows is during the late fall when the temperature is milder, so the windows can seal and settle properly. A professional local window installer in Denver will be able to explain when the best time is to install windows on your home.

The right type of replacement windows for your Denver home depends on when your home was built –the average house in Denver was built around 1974. If your home was built a while ago, you might want to consider efficient windows such as double-pane windows, which are made 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 newer homes, you might want to think about vinyl windows, which are affordable, durable and have a modern look.

The most expensive windows are those with multiple moving parts such as double-hung and casement windows. They are more intricate than single-hung windows, which makes them more expensive. Single-hung windows are the most budget-friendly on the market. In terms of frames, vinyl and aluminum are the most affordable options.

It depends on your budget and the condition of your current windows. If your current windows are in decent condition, you might decide to only replace the ones that really need replacing. If you're in an area that has average energy costs, you may want to consider replacing all your windows at once to get the highest energy savings.

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

Yes, many window installers offer financing 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 $85,853 a year in Denver, you may be able to qualify for lower interest rates.

Hiring a professional window installer helps guarantee the job is done correctly. Professional installers will measure in order to get a perfect fit and will use the right techniques and materials to ensure your windows will be correctly sealed and fitted. Additionally, professional installers are likely to have access to better materials and more experience than the average person, so you can expect your windows to be installed correctly and stand for years to come.

Other Denver, CO Home Services

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