Gravina's Window Center of Littleton is a window replacement company serving the Front Range.  We are an A+ Better Business Bureau Rated Company family owned and operated. We strive for excellence in the installation of new windows or doors, including fiberglass replacements that are energy efficient!


  • Get the most durable fiberglass window on the market.
  • Window replacement from start to finish.
  • Boost the value of your home with energy-efficient fiberglass replacement windows.
  • Custom-made for a flawless fit.

Patio Doors

Patio doors designed and constructed to defend your home from Colorado weather, day in and day out.

Entry Doors

Our entry doors feature unsurpassed quality and style to create the perfect focal point for your home.

Storm Doors

We have a wide variety of storm doors that can be customized to your home. We also offer door installation.


We offer James Hardie fiber cement siding with multiple options and styles, exemplifying our commitment to elegance and endurance.


Bi-Fold Doors provide clean lines and more glass, without compromising performance. Featuring the widest panel doors in the industry, these doors fold open to offer wide-open views.


We are committed to providing you with great windows, superior installation, and exceptional results.


Create the perfect design for your home with a new patio door or front door. From color, to glass and hardware, find your ideal look with our many style and design options.


The Right Products Make All The Difference. Make Your Home Uniquely Yours with James Hardie Siding.

The Infinity from Marvin Advantage

  • Expands 87% less than vinyl - resists expanding and contracting in any climate
  • 8 times stronger than vinyl - protects the integrity of your home
  • Resistant to leaks, seal failures and stress cracks - all things that can affect energy efficiency
  • Ultrex's fiberglass windows and doors strength delivers narrow profiles for expanded views and more daylight
  • Our proprietary acrylic finish is fade-resistant and virtually maintenance-free
  • We offer a complete collection of styles, features and options to complement any home

Colorado's Oldest Infinity from Marvin Retailer



We've Been Installing Windows and Doors For Over 49 years

If you're a homeowner living in Denver and need replacement windows or doors, reach out to the oldest Infinity from Marvin dealer in Colorado - Gravina's Window Center of Littleton.


The benchmark for customer service and satisfaction

  • Limited Lifetime Warranty for as long as you own your home
  • An experience that is designed to give you assurance at every step of the way
  • Our core value: Do the Right Thing

Customer Testimonials

“Gravina’s Window Center of Littleton supplied and installed 8 Marvin Infinity windows a pair of French doors for us. The windows look good and work well. They replaced trim and painted everything. We are very pleased with the job and highly recommend.”

“Gravina's has been an absolute pleasure working with from the initial evaluation and meeting with Justin and John. To Lisa helping me find the ebony color that looks amazing on my house.”

“Our experience with Gravina's was first class in all areas from the sales force to the installers! The sales staff really listened to what we wanted and gave us exactly what we asked for - NO PRESSURE here. A very comfortable experience.”

Te benchmark for customer service and satisfaction

  • Limited Lifetime Warranty for as long as you own your home
  • Tailored experience that guarantees peace of mind for years to come.
  • We stand behind the products we sell and install.