The Replacement Window Specialists Serving Denver, CO, Area Homeowners

The living area of a home with bright light pouring in through the tall vertical windows

If it’s time for new windows to be installed at your home, turn to the industry experts at 1st Choice Windows & Siding. As a family-owned company serving homeowners in the Denver, Colorado, metro area since 1995, we aim to be your first choice for top-quality replacement windows and exceptional installation services 

Your satisfaction is our No. 1 priority, and we’re confident you’ll see why we’re the local exterior remodeling company of choice when you partner with us for your home window replacement project.  

Custom Windows Designed to Last 

At 1st Choice Windows & Siding, we’re committed to craftsmanship. That’s why there’s nothing cookie-cutter about what we do, as we offer completely customizable replacement windows sourced from renowned manufacturers like Andersen, Milgard, Simonton, and more. Available with your choice of vinyl windows, wood windows, or fiberglass windows, these products also come in a variety of styles and shapes to fit any budget or aesthetic preference. Choose from: 

  • Double-hung: A classic style with modern engineering sensibility. Double-hung windows allow you to operate both sashes for ease of use and cleaning! 
  • Casement: These versatile windows are the epitome of convenience and elegance. A seamless operation with a smooth crank, allowing you to control ventilation effortlessly. 
  • Awning: Say hello to fresh air and protection from the elements with an awning window! These unique windows tilt out at an angle, providing you with adequate ventilation and shielding from the outside. 
  • Bay and bow: Whatever your choice, bay or bow windows will surely add an air of sophistication to your home. Picture a cozy seating area or a delightful spot for indoor plants—their design adds a touch of charm to any room. 
  • Garden: Do you love your plants but need a better place to showcase them? A garden window can show off your collection and give your plants enough natural light to help them grow! 
  • Picture: Stunning views and simplicity combine to give you a large window option without frames obstructing your ability to see outside. Bring the outdoors in with a picture window! 
  • Sliding: Do you pine for easy window operation? A sliding window is an excellent choice for homeowners who want to invite in fresh air without having an engineering degree.  
  • Geometric:Is it time to bring a more artistic flair to your windowsills? Geometric windows give your home a more elevated aesthetic with unique designs and shapes. 

No matter which style of window you select for your home, you can expect a bevy of benefits that range from durability and low maintenance requirements to improved curb appeal and energy efficiency. 

Lower Your Energy Bills 

New windows are one of the most reliable ways to lower energy costs. Thanks to improvements in engineering and manufacturing, your new windows can help keep your home’s temperature at a comfortable level without heat loss due to leaky windows. You’ll notice a difference in your energy bills after only a few months of using them! 

Expert Window Installation Services 

Even the best windows in the industry won’t perform as they should without a proper window installation, which is why our window company always abides by our strict workmanship standards. What’s more, we include our own 10-year installation guarantee for every product purchased on top of any warranties provided by the manufacturer. 

Learn More About Our Replacement Windows 

When you’re ready to enhance and beautify your home with gorgeous new replacement windows, make sure the job gets done right the first time by partnering with the team at 1st Choice Windows & Siding. Contact us today to learn more about our windows and schedule a free consultation at your Denver, CO, area home. Ask us about Federal Tax Credits!


“Window replacement was for our elderly mother and the professionalism of the entire 1st Choice team, greatly appreciated by the family - we did not have to worry that mom was being sold a 'bag of goods.' Love the new windows! Noise reduction, energy efficiency, look, all just great!”

Jane W
Committed to Craftsmanship

Let Us Be Your 1st Choice for Home Improvement

The Team to Trust for Top-Notch Service
Schedule Your Free Consultation
Affordable Remodeling Solutions

Convenient Financing Plans Available

Home Upgrades for Less Than You Would Pay for a Cup of Coffee a Day

Explore Financing Options

“I could not believe how fast they got the job done and how well done it was! They obviously were very careful about every detail. The house looks fantastic and everyone I talked to at the company was great to work with. The guy who did the inspection for the people who bought our house even asked us who did the siding because they did such a great job!”

- Abby C

“Chris was an absolute gem to work with and the window suggestions were perfect. The home was built in 1962 and had all of the old steel frame windows which were losing energy rapidly. We noticed an immediate change in the environment inside the house and the outside looks fantastic. Great installers.”

- Carol S

“Window replacement was for our elderly mother and the professionalism of the entire 1st Choice team, greatly appreciated by the family - we did not have to worry that mom was being sold a 'bag of goods.' Love the new windows! Noise reduction, energy efficiency, look, all just great!”

- Jane W
Mastic logo
Milgard logo
Anlin logo
Crane siding logo
LP SmartSide logo
Simonton logo
BBB logo
Diamond Kote logo
Angie's List logo
Vesta logo