Beat the Heat!
Ends August 31st, 2025
Upgrade your home this summer with 40% OFF all windows, siding, and doors — our biggest savings of the season!
AND Beat the Heat with a FREE energy-saving glass package upgrade!

*Contact for details

Get a Free Quote Now!
Top-Quality Windows, World-Class Service
Fill out the form below to explore your options.

Replacement Windows That Fit Your Personal Style

Could the windows in your Denver area home use updating? If your windows are more than 15 years old, you may be facing issues like sticking windows, drafts, and skyrocketing energy bills. Window replacement is the best option to fix these problems while bringing a fresh look to your home! At 1st Choice Windows and Siding, we offer top-of-the-line windows that are:

  • Customizable - Our windows are available in wood, fiberglass, and vinyl to suit your unique needs and preferences. You'll also be able to choose from a wide array of styles, colors, and other design options, so we'll surely have something that suits your taste and complements the unique character of your home.
  • Energy efficient - Our ENERGY STAR ®-rated windows will help insulate your home and stabilize its interior temperature. That will help reduce the strain on your HVAC system and lead to lower monthly energy costs.
  • Durable - Our windows (even modern black windows) are exceptionally tough and will resist warping, rotting, and other forms of wear and tear over time.
  • Backed by strong warranties - Your new windows are backed by the manufacturers product and labor warranties backed by 1st Choice, in addition to the manufacturer's warranty, so you can have total peace of mind knowing your investment is protected.

Additionally, we have a general contractors license, which allows us to add brand-new window openings to a wall—something not all window contractors are qualified to do.

For more information about our stylish and high-performance replacement windows, and to get started on your project, contact 1st Choice Windows and Siding today!

Get a Quote
Beat the Heat!
Ends August 31st, 2025

Upgrade your home this summer with 40% OFF all windows, siding, and doors — our biggest savings of the season!
AND Beat the Heat with a FREE energy-saving glass package upgrade!

*Contact for details

Learn More
Low Monthly Payments

Our financing plans make getting your new home windows easier than ever.

Learn More
Inspiration Gallery

See How Beautiful Your Home Can Be

Brands We Build With

We install windows by industry-leading manufacturers like Anlin, Milgard, Weather Shield, and Simonton.

The Most Reliable Home Improvement Contractor in Denver & Surrounding Areas

1st Choice Windows and Siding has been the go-to contractor among homeowners in Denver and the surrounding areas since 1995. Our family-owned and -operated company specializes in installing high-quality energy-efficient windows, siding, and doors at affordable prices. We pride ourselves on providing fair and accurate quotes the first time, as well as quality workmanship and unmatched customer service. We also have a general contractor’s license, so we can do things like add brand-new windows and doors to a wall where there weren’t any before—something that distinguishes us from other local contractors.

We work with over 10 different renowned manufacturers that offer an array of options, so you can select the product that best suits your home, taste, and budget. All purchases are backed by the manufacturers product and labor warranties backed by 1st Choice. Our goal is to achieve complete customer satisfaction from the estimate to the installation, and this commitment to excellence has helped us earn consistently positive reviews and an A+ rating with the BBB.

Owner Tom Haines and his design specialist and installers will come to your house to take specific measurements and talk through all your options. We're not trying to sell you just any windows or siding—we will match your needs with the windows or siding that are right for your home to ensure you'll love your renovations for years to come. Contact 1st Choice Windows and Siding today to get your project started!

Learn More
What Our Clients Are Saying
See what our clients have to say about working with us!
Steven H.

"The installers...did a GREAT job! The windows looks great, our house is much better insulated and secure, and we can finally open windows that were previously broken. I highly recommend this company, and we will be using them to finish the 3 remaining windows and the sliding glass door next year!"

Deb D.

"I reached out to 1st Choice Windows and had a call back right away from a very friendly associate named Helen. Within a couple of days Jay was at my house showing me quality window options with lots of features. I was very pleased with the bid that Jay presented and signed a contract right away! I can 't wait to do future business with these great people. Thanks Helen and Jay!."

Alyssa M.

"We had a really good experience working with this company from initial meeting to final walk through. We replaced over 50 windows in our home, so this was a big job and we are very pleased with choosing 1st Choice. The owner, Tom, was very knowledgeable and helped us select the best windows for our home within our budget. Our installer, Ryan, went above and beyond to make the finished product exactly what we wanted. Their customer service point of contact, Helen, is incredibly kind and ensures customers are taken care of. We would happily recommend this company!"

Contact Us Now: (720) 580-3000
Get a Free Estimate
Contact Us Today