Promotion Ends October 31st, 2020


Name *

Email *

Phone Number *

Where did you hear about us *

Message *

Summer Sale 2
simontonwindowslogomilgard certified dealer transparentinstallation masters logo


Connie Holland

We recently had windows replaced on our home. The owner came out and gave us a bid. He was very professional and did not pressure as some do. His bid was very competitive and the windows were high quality. Everything he promised, he delivered. When we had questions, he responded in a very timely manner. We were so happy with his work ethic, we had him bid another job for siding. Once again we were impressed and didn’t hesitate to sign contract. He keeps us posted as to when materials are in and job will be done.

On a personal note, We have known him for 8 years. He is very conscientious and professional. He is kind and keeps his word. We give him our highest recommendation.

Connie Holland

Cynthia Hawn

I trusted them with a large remodel of my home & they exceeded my expectations! I had siding, windows & a French door replaced. They earned my loyalty & all future business.

Cynthia Hawn

Ryan Barrett

I enlisted Greg Davis to help with replacing our broken drafty windows. His crew was very professional. Windows were replaced quickly and professionally. Our home is much more comfortable now.

Ryan Barrett

Derek Clapp

I have worked with them for many years now. Very professional, from first contact to installation. Easy to communicate with, great prices and most importantly will always get the job done. Fantastic company. Highly recommend!!

Derek Clapp

Jamie Schmidt

Greg Davis from Millennium Windows and Siding does a fantastic job! I have referred him to many of my customers and he has proven to be a man of his word. My customers have received great service and attention.

Jamie Schmidt / Core Contractors roofing systems

Lisa K

Millennium Windows and Siding was truly a Godsend after getting quotes from other big names in windows that were outrageously overpriced. Greg came to the house and sold us beautiful quality windows for the right price! The installers were courteous and friendly and very professional. They did a great job! The outside noise is amazingly reduced and the temperature in our 2-story home has evened out! I am so happy and impressed with Millennium and highly recommend their services!

Lisa K

Steven Gustas

I met Greg Davis, Owner of Millennium Windows and Siding back around October/November of last year. He came out and gave me an estimate on my siding. My wife was battling Stage 4 cancer at the the time, so I wasn’t really prepared to follow through with any decisions. He was very kind and understanding and did not pressure me at all. Since then, I hadn’t made any contact with him for months because of what I was going through. I met with him again In late February and on few more occasions while trying to decide on a company that would meet my expectations. Not only is he knowledgeable about the products out there and that he offers, he also has given me the best pricing and has treated me with honesty, integrity and respect. Because of this, I have decided to move forward with Millennium Windows and Siding for the install in the next few weeks. I highly recommend him and his company.

steven gustas

Millennium Windows And Siding is a family-owned and operated business established in 2006. With our expertise and experience, we are able to pull permits in every county and city to assure your home improvement project is up to code and satisfactory — we strive to give you the best windows and siding service possible in: Denver, Fort Collins, Colorado Springs, and Wheat Ridge, CO.



Beautiful and Energy-Efficient options at an affordable price.



Durable, Weather-Resistant Home Siding in a variety of styles and colors.



Fast, Precise Installation to increase the value of your home.

Quality Windows and Siding at Affordable Prices in Wheat Ridge, CO & Colorado Springs

Millennium Windows & Siding is the company you can trust for the personal attention and exceptional service you deserve.

Affordable Prices

Affordably-Priced Windows and Siding from Industry Leaders. We bring integrity, a commitment to great customer service, and a combined 22 years of experience to your home improvement project. Get competitive pricing, plus, no money down, no interest financing for 18 months.

Clearly Better

Whether your home needs new or replacement windows or siding, your satisfaction is our top priority. We always strive to exceed your quality and service expectations. Energy-Star rated windows and siding provide the ultimate in energy cost savings. We get your windows and siding installed in 3 weeks.

energy star

100% Lifetime Warranty

Our products are backed by our true 100% lifetime warranty* with no trip fee and no labor fee! An investment in new windows or siding from Millennium Windows & Siding will increase the value of your home, because our warranty transfers to the new homeowners when you sell.
* Includes window frame, operators, seal and glass. Call (720) 508-4385 for details.

Why Choose Millennium Windows & Siding

Millennium Windows & Siding is the company you can trust for the personal attention and exceptional service you deserve. We provide quality windows and siding at affordable prices with top-of-the-line service.

simontonwindowslogomilgard certified dealer transparentBBB A plus 1



$1500 Off Entire Home Of Siding

3 Or More Energy Star Rated Windows for $595 Each

promo update

callnow btn

Get a free quote today!


Once a contract is signed and approved, Millennium Windows & Siding will not change the price of your project for any reason. There will never be any additional fees and/or costs added to your home project.

We provide top-of-the-line service for clients in the following cities: Denver, Arvada, Golden, Centennial, Highlands Ranch, Parker, Castlerock, Littleton, AuroraWheat Ridge and surrounding areas. Call (720) 508-4385 for immediate assistance today.

We recently opened another showroom in Colorado Springs and are able to provide the same level of craftmanship to residents in the following areas: Falcon, Larkspur, Manitou Springs, Monument, Old Colorado City, Palmer Lake, Peyton and Woodland Park, CO. Contact us today for a FREE consultation.

Improve Your Home’s Appearance. Increase Its Value. Learn More Here...




Call Now Button

Denver Location – (720) 508-4385
Colorado Springs Location – (719) 387-0277