Denver(303) 658-9990 Co. Springs(719) 419-5905

Top Residential Window Replacement in Littleton, CO

Shopping for new or replacement windows in Littleton can be a daunting and arduous process lasting close to three hours. The window replacement process doesn’t have to be burdensome — it should be simple and fun!

At Zen Windows Denver, we take the stress and guesswork out of residential window replacement and installation. Our window company offers top-quality materials, fair prices, and fast, accurate, hassle-free quotes in minutes for your Littleton home.

Types of Replacement Windows

There are many different types of replacement windows and customizable options that would work well in your Littleton home based on your personal design preferences and your home’s architecture.

All of our windows are made of 100% virgin vinyl and come in many shapes and sizes to match your home, your needs, and your budget, including:

  • Single-hung windows: If you prefer simple, traditional windows, single-hung windows are a great option. This well-designed choice has one fixed upper pane and one lower moveable part, making them a low-maintenance, affordable option.
  • Double-hung windows: Our most popular style of windows, our replacement double-hung windows can open from the top or bottom sash. This favorite combines a classic look with a durable composition.
  • Slider windows: If you want to enjoy breathtaking views of Littleton and the greater Denver area, slider windows are a perfect choice because their large horizontal opening offers a wider, less-obstructed view.
  • Awning windows: Awning windows are hinged at the top and open outward from the bottom. This style is typically installed in basements, first-floor bathrooms, and hard-to-reach areas in the home because they are easy to open and allow for ventilation.
  • Hopper windows: Similar to the awning window, hopper windows are horizontal but are hinged from the bottom and are another popular choice for basements and first-floor bathrooms. They are durable and energy-efficient to withstand the snow and rainy weather that Littleton residents experience each season.
  • Round-top windows: Round-top windows, also called arched windows, radius windows, and half-moon windows, can add a beautiful focal point and natural light to any room, especially in spaces with high ceilings or very tall openings.
  • Casement windows: Opening vertically like a door to either the left or right, casement windows are hinged on the side with one sash. This window style can add light and air to any room, and the huge glass area allows for easy cleaning.
  • Picture windows: This fixed, stationary window option comes in all sizes and shapes, adds natural light to any room, and is energy-efficient.
  • Bay/bow windows: These three-dimensional windows are available in double-hung, casement, or picture windows to add dimension, space, light, and depth.

If you’re unsure which window style best suits your needs for your Littleton home, call 303-658-9990 or contact us online and one of our window specialists will help you make the right choice!
Replacement Windows in Littleton, CO

Three Exclusive Replacement Window Lines

At Zen Windows Denver, we know each home is different, and that’s why we carry three lines of high-quality vinyl replacement windows to fit our customers’ needs, tastes, and budgets. Each brand offers unique features and varying price points.

Choose from three levels of window options:


Karma is our window line for Littleton homeowners who want top-quality, performance, and energy efficiency for a more modest investment.

Some features of these base model double-pane windows include:

  • High-performance Low-E and Solar low-E glass options
  • Fusion-welded sashes and frames built to be exceptionally strong and durable
  • Dual-fin, wool-pile weatherstripping to protect the perimeter of all sashes


The Nirvana model has the same qualities as our Karma line but offers improved thermal effectiveness, a heavy-duty vent lock, and additional key features, including:

  • An exterior beveled mainframe with a drip cap to enhance beauty and style
  • An insulating comfort foam in the frame that improves the window’s thermal effectiveness
  • A heavy-duty vent lock that allows the window to remain partially open for ventilation


Lotus is our premium, high-end window option because of the luxury and performance it offers. These beautiful, triple-pane windows are available in Ultra S and Solar Ultra S glass options and are reinforced with fiberglass to ensure maximum security. They also feature:

  • A Super Spacer® metal-free, warm-edge sealing system
  • Screen latches to lock screens in place
  • Low-profile tilt latches on double-hung options, making them easy to use and clean

All of our windows come with a lifetime warranty and can be customized with our great selection of colors, materials, patterns, and add-on options.

Check out our window gallery to get some ideas for starting your project!

Why Choose Zen Windows Denver for Replacement Windows in Littleton?

When you choose to work with Zen Windows Denver for your replacement windows, you will experience a smooth, no-hassle, streamlined process where we focus on providing you with a memorable window-buying experience. We make sure you are completely satisfied before any job is considered done.

We know you can choose other window companies for your window replacement project, but here are some customer benefits that make us unique:

Contact Zen Windows Denver

Shopping for new or replacement windows and doors doesn’t have to be traumatic or challenging. With Zen Windows Denver, the process is fast, easy, and enjoyable! See what our satisfied customers have to say!

Contact us online or call 303-658-9990 today to start with a free, no-obligation quote.