free window estimate


denver windows doors siding

303-794-0490   SHOWROOM HOURS: Monday - Friday 8am - 5pm; Saturday 9am - 3pm  (After hours by appointment)

Replacement Windows | Patio Doors | Entry Doors | James Hardie Siding

You and your home deserve the best, and for windows and doors that last a lifetime, you want Gravina’s Window Center of Littleton. That's why Gravina’s carries brands we Infinity Windows from Marvin, James Hardie Siding, and Provia and Therma-Tru Entry Doors.


 Thank you for visiting Gravina’s Window Center of Littleton.  We are a family owned and operated home improvement company specializing in replacement windows, doors, James Hardie Siding and installation.  We believe that we offer something different to homeowners in the greater Denver area.  We pride ourselves on the expertise we can offer our clients, drawing from our extensive background in the home remodeling industry.

Our aim is to provide every client with great customer service from start to finish.   We will guide you through the ordering process, inform you of what to expect through the installation process, and install your product using the proper techniques and procedures without cutting corners.  These steps ensure that your product will be covered under any applicable manufacturers warranties and that you with be satisfied with the product and workmanship for years to come.


At Gravina's Window Center of Littleton, we use only the highest quality materials to provide professional window replacement, patio doors, entry doors and James Hardie siding. We ought to know, we have been doing windows in Colorado since 1973!


  What are you waiting for? Start your window replacement project today!

Simply fill out the contact form or call us at 303-794-0490 for your free no-obligation quote.


Please visit our window and door showroom located at 89 W Littleton Boulevard, in Littleton (between Broadway and Littleton Blvd and just south of Belleview).




Contact us today for a FREE quote! *We never share your information. Read our privacy policy.

Please enter your name

Please enter your phone number

Please enter your email address

Please enter a message

How Did You Find Us?
Invalid Input

Please check the box to verify you are not a robot


  • Windows


    Replacement windows add value and beauty to your home, reduce costly maintenance, and save you money on your utility bills. Read More
  • Patio Doors

    Patio Doors

    Patio Doors need to withstand heavy use as well as our extreme weather conditions here in Colorado. Read More
  • Entry Doors

    Entry Doors

    Gravina's recommends fiberglass entry doors for long-lasting beauty and value with less maintenance. Read More
  • Siding


    Traditional and timeless. Sleek and strong. James Hardie is the most popular brand of siding in America Read More
  • 1

infinity replacement windows



james hardie siding fiber cement

marvin windows and doors 



ProVia door replacement denver

ThermaTru doors



Simonton windows