Looking to replace your doors or windows but not sure where to start? Check out our totally unique take on door and window installation - it'll have you seeing the world differently in no time!

replacement windows denver

Infinity Windows

Infinity from Marvin fiberglass windows offers timeless style, strong performance, and durability built to last.

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Replacement Doors

Make a great first impression in your home with custom interior and exterior doors. We offer sliding patio doors, french doors, bifold doors, and more for your home.

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James Hardie Siding

James Hardie fiber cement siding is the perfect choice for people who want a long-lasting, low-maintenance exterior. This material will protect your home from mother nature and maintain its value over time so you can enjoy living in your home with no worries!

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Replacement Windows Denver




Trust the Highest-Rated Local Window Company in Denver

Our company guarantees the highest quality work by ensuring that all of our window installers are adequately trained and properly equipped. We're committed to doing things right from start to finish – no shortcuts! That's why you can trust us when it comes time to install your new windows and doors. This gives you excellent quality assurance and ensures that your home will be kept safe for years to come - providing unbeatable peace of mind.

Gravina's Window Center of Littleton

At Gravina's Window Center of Littleton, we believe every customer deserves to be treated like family. With four generations worth of commitment and expertise in the window and door industry behind us, you can trust that your home improvement dreams will come true! We look forward to having a long-term relationship with you that honors our core values while creating an extraordinary experience for all.

Best Replacement Windows


Replacement Windows Denver

  • 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 sizes to complement any home


Why Gravina's Window Center of Littleton?

    Colorado's Oldest Infinity from Marvin Retailer
Partnering with Marvin Windows and Doors, we knew Infinity from Marvin had a special product over 20 years ago.

     Giving Back Since 1973
As a Family-run business we have given back to our community, and will continue to do so.

    Lifetime Warranty
Being in business as long as we have, we know customers need peace of mind when it comes to their home.


Your stress-free experience includes a quick, accurate proposal without pressure or pricing games


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Our Promise and Values

Our family is committed to providing you with the best window replacement experience. We back it up with world-class Infinity Windows and Doors in-house installation.