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Millennium Windows & Siding

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Milgard Windows

Milgard is one of the largest, most trusted names in home windows, serving the Western U.S. and Canada with over a dozen full-service facilities and Customer Care Centers. We believe that by being close to our customers, we can provide you better service. This means faster lead and delivery time, as well as a quick response to any window warranty situations.

  • Milgard Tuscany Vinyl
  • Milgard StyleLine Vinyl
  • Milgard Fiberglass Windows
  • Milgard Fiberglass Windows with Wood Interior


  •  High-Performance Vinyl Siding from Norandex
  •  James Hardie is the #1 Fiber Cement Siding Manufacturer
  • LP® SmartSide® For Durability Plus the Beauty of Wood


  • Moving Glass Walls
  • Therma-Tru
  • Entry Doors

Our Crews Work Year-Round

New windows and siding are one of the best ways to improve the energy-efficiency and appearance of your home, so Millennium Windows & Siding won’t make you wait for warm weather for your installation to begin. Count on us to deliver precision installation all year long — within a few weeks of completing the project agreement.



By Alicia S

Our new milguard Windows and vinyl Siding were installed by Millennium and we couldn’t be happier! They communicated with us on installation and the crews were on time and did a great job! I would use them again!

By Lauren G

I searched many companies and I am so happy I chose Millennium Thank you Greg and Adrian for your integrity. You made it easy and I received exactly what I expected.

By Trevor M.

Millennium came highly recommended and they still exceeded my expectations. Their best attribute is communication. Greg is in constant contact and keeps me up to date with all of my projects. They are professional and maintain a very high level of workmanship and service to all of my customers. Highly recommend!

    Thank you for all of your hard work and dedication!
By Sabrina O

I have been very pleased with the quality of service this company provides. I sincerely appreciate their responsiveness and the way they conduct business. Adrian Sanchez and Greg Davis have always been VERY dependable, straightforward and honest. I have always been able to rely on their flexibility and courteous service. On several occasions they have had to go out to our job-sites to meet with insurance adjusters for a re-inspection to get additional items approved. It's a pleasure to work with people who know the meaning of efficiency. I have recommended this company to many others because of my businesses' satisfaction with their service. I appreciate their efforts and look forward continuing our business relationship.

By Jan Penfold

My house looks wonderful. I am very pleased with the work Millennium did for me. I love the LP Smart Side with the 30 year paint warranty. The attention to detail was outstanding. Workmanship outstanding they even ate lunch in my back yard as the worked. Very very good work ethic. Good craftsmanship top notch. Arrived at 8:00 am and stayed until night. Millennium preformed Asbestos encapsulation had the house tested and did the instillation by the book.

    Responsive, Attentive, Knowledgeable
By Doug S. 7/11/2017

Our project involved replacing a bank of 3 windows with a single picture window in a very weather exposed side of our house. We worked with both of the owners, Greg and Bruce, to figure out the best option to serve our requirements based on product preference and budget. Both of them were responsive, attentive, knowledgeable, and easy to work with. After ordering our window, the follow up steps including measuring and lead testing occurred on time, and were performed by personable professionals. The window was installed about 1 month after it was ordered and the installation process was smooth and efficient, and the installers were very professional. We are thrilled with the end product and will recommend Millennium to our friends, family, and co-workers if they have window replacement/installation projects in the future.

    Knowledge was a comfort
By Jay W. 10/20/2017

These guys helped me out after the last hailstorm. Their knowledge was a comfort, and their professionalism made having them work on my house a stress free experience.

    Excellent service!
By Matthew M 1/21/2018

They are not aggressive or pushy. They are timely and professional. I feel like I got the best value for my money. Greg is super knowledgeable and friendly. I highly recommend them, you won't be disappointed. There was a warehouse shipment error that was not their fault, they still made it right by upgrading my patio door. After 22 years in the military, an MBA, 5 homes, and countless business credentials, I can honestly say they nailed it!!!!!!

    Great Company
By Trevor M. 1/24/2018

Millennium is a great company and Greg is a wonderful person to work with. They are very knowledgeable and timely. All of their work is top quality and they use top quality materials. I highly recommend Millennium for any of your window or siding needs.



Address:    12090 W 50th Place
City:    Wheat Ridge
State:    CO
Zip:    80033
Phone:    (720) 508-4385

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