About

Improve Your Home’s Appearance. Increase Its Value.

Millennium Windows and Siding, is a full-service window and siding company that services the Denver Front Range, and mountain areas. At Millennium Windows, they offer in-home personal designing and consultations.  Whether your home needs new or replacement windows and/or siding, your satisfaction is their top priority. They always strive to exceed your quality and service expectations. At Millennium Windows & Siding, you work directly with the owner eliminating the salesman’s high commission.

An investment in new windows or siding from Millennium Windows & Siding will increase the value of your home, because their warranty transfers to the new homeowners when you sell.

They 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.

We hope to earn your business.

Services Offered:


  • Vinyl Replacement Windows
  • Wood Replacement Windows
  • High Performance Energy Star Windows
  • James Hardie
  • Fiber Cement
  • Engineered Wood Siding
  • LP Smart Side Siding
  • Diamond Kote Siding
  • 100% Lifetime Warranty

Google Reviews

Millennium Windows & Siding Rating: 4.6

Drew F

Nov 01, 2018
Our experience with Millennium Windows & Siding was excellent from start to finish. Ethan Burke was great about explaining the process to us […]

Shawnee Cowan

Oct 05, 2018
We just had siding installed on our home, and our home looks amazing. Millennium Windows and Siding provided exemplary service and […]

Tracy Moore

Oct 24, 2018
DO NOT LET THIS COMPANY TOUCH YOUR HOUSE!!!!!!!!!!!!!!!!!! I’m almost certain more than half of these reviews are fake and done by the […]

Chris Galinsky

Jul 11, 2018
I really loved working with Tim! He was an amazing person to work with on our home improvement project. Honest and fair in pricing […]

Tito Bandito

Jul 12, 2018
I had a pretty good experience with Millennium. I contracted them to reside my home. The work was very good. There were a few […]

50 Recommendations

Please provide us with the following before posting your endorsement

There are not enough superlatives in my vocabulary to describe my experience with Millennium Windows & Siding who just finished our exterior residential siding job.

I am very happy & pleased to say that our house looks amazing!!!

I could not be more thrilled with their price, workmanship and reliability.
Owner, Greg is a fantastic siding professional. He came into our home with direct pricing information and lots of knowledge of their products.

The communication streamlined throughout the project. The supplies were delivered on time & work was completed as discussed in a timely manner . Each & every day the crew ( YS Corp) came on time, worked on very hot days and took minimal breaks. They were meticulous in detail. Thank you Suki & Crew.

There were no surprises or problems on our project. I would definitely recommend them to my friends and neighbors because of our experience & full satisfaction.

I & B (Evergreen, CO)

There are not enough superlatives in my vocabulary to describe my experience with Millennium Windows & Siding who just finished our exterior residential siding job.

I am very happy & pleased to say that our house looks amazing!!!

I could not be more thrilled with their price, workmanship and reliability.
Owner, Greg is a fantastic siding professional. He came into our home with direct pricing information and lots of knowledge of their products.

The communication streamlined throughout the project. The supplies were delivered on time & work was completed as discussed in a timely manner . Each & every day the crew ( YS Corp) came on time, worked on very hot days and took minimal breaks. They were meticulous in detail. Thank you Suki & Crew.

There were no surprises or problems on our project. I would definitely recommend them to my friends and neighbors because of our experience & full satisfaction.

I & B (Evergreen, CO)

There are not enough superlatives in my vocabulary to describe my experience with Millennium Windows & Siding who just finished our exterior residential siding job.

I am very happy & pleased to say that our house looks amazing!!!

I could not be more thrilled with their price, workmanship and reliability.
Owner, Greg is a fantastic siding professional. He came into our home with direct pricing information and lots of knowledge of their products.

The communication streamlined throughout the project. The supplies were delivered on time & work was completed as discussed in a timely manner . Each & every day the crew ( YS Corp) came on time, worked on very hot days and took minimal breaks. They were meticulous in detail. Thank you Suki & Crew.

There were no surprises or problems on our project. I would definitely recommend them to my friends and neighbors because of our experience & full satisfaction.

I & B (Evergreen, CO)

There are not enough superlatives in my vocabulary to describe my experience with Millennium Windows & Siding who just finished our exterior residential siding job.

I am very happy & pleased to say that our house looks amazing!!!

I could not be more thrilled with their price, workmanship and reliability.
Owner, Greg is a fantastic siding professional. He came into our home with direct pricing information and lots of knowledge of their products.

The communication streamlined throughout the project. The supplies were delivered on time & work was completed as discussed in a timely manner . Each & every day the crew ( YS Corp) came on time, worked on very hot days and took minimal breaks. They were meticulous in detail. Thank you Suki & Crew.

There were no surprises or problems on our project. I would definitely recommend them to my friends and neighbors because of our experience & full satisfaction.

I & B (Evergreen, CO)

There are not enough superlatives in my vocabulary to describe my experience with Millennium Windows & Siding who just finished our exterior residential siding job.

I am very happy & pleased to say that our house looks amazing!!!

I could not be more thrilled with their price, workmanship and reliability.
Owner, Greg is a fantastic siding professional. He came into our home with direct pricing information and lots of knowledge of their products.

The communication streamlined throughout the project. The supplies were delivered on time & work was completed as discussed in a timely manner . Each & every day the crew ( YS Corp) came on time, worked on very hot days and took minimal breaks. They were meticulous in detail. Thank you Suki & Crew.

There were no surprises or problems on our project. I would definitely recommend them to my friends and neighbors because of our experience & full satisfaction.

I & B (Evergreen, CO)

There are not enough superlatives in my vocabulary to describe my experience with Millennium Windows & Siding who just finished our exterior residential siding job.

I am very happy & pleased to say that our house looks amazing!!!

I could not be more thrilled with their price, workmanship and reliability.
Owner, Greg is a fantastic siding professional. He came into our home with direct pricing information and lots of knowledge of their products.

The communication streamlined throughout the project. The supplies were delivered on time & work was completed as discussed in a timely manner . Each & every day the crew ( YS Corp) came on time, worked on very hot days and took minimal breaks. They were meticulous in detail. Thank you Suki & Crew.

There were no surprises or problems on our project. I would definitely recommend them to my friends and neighbors because of our experience & full satisfaction.

I. B. (Evergreen, CO)

Ingrid Basler

If I could give 10 stars I would! Greg, the owner, was incredibly thorough in his assessment of our siding needs and explained every single detail to us along the way. He was great at explaining the process and the products and was more than fair with his pricing and timelines. He really bent over backwards to help us get the job done right! He also helped us find specialty contractors for another non-siding related project and worked with both us and them to get that project set-up. I can’t say enough good things about Greg and Millennium! I would highly recommend them to anyone looking for siding, windows or exterior projects.

Carrie Gesiorski

Millennium installed a garden window for me and I love it. High quality workmanship. Best price I received and great work.

Jan P.

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.

Lauren Grear

Our new Milgard 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!

Alicia Scott

Overall, the experience I had with Millennium Windows was great! I love the fact that they are family owned & locally operated. My wife and I were very pleased with the quality of the windows as well as the information we received from the rep that was sent to our house. 10/10 will definitely recommend to our friends and family!

Ryan Russell

Can't say enough about Greg and his efforts to be sure the job is done correctly. His knowledge and professionalism are truly appreciated!

Troy Beckert

I have been using Greg for several years now, my go to guy for windows and doors. I have completed 6 projects and will continue to use him. I refer him to friends and family. There is a wide selection available, he can find a good fit for whatever your project needs are.

Josh

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 and Greg 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. Thank you for all of your hard work and dedication!

Marie O.

I have been using Greg for several years now, my go to guy for windows and doors. I have completed 6 projects and will continue to use him. I refer him to friends and family. There is a wide selection available, he can find a good fit for whatever your project needs are.

Satisfied Customer, Denver, CO

Great company to work with! Great prices, extremely knowledgeable, dependable and the final product was a beautiful upgrade as promised! Excellent customer service from start to finish. Highly recommend!!

Kate J.

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. Thank you for all of your hard work and dedication!

Sabrina O.

Excellent service! 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!!!!!!

Matthew Mazzarello

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!

Trevor Moss

Highly recommended Great customer service and work done for a reasonable price and always a pleasure to work with the owner to make sure all projects are completed to satisfaction. Only company I use for my Window and Siding needs.

Amanda Berg

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

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

Our house looks wonderful with the new siding, the price was great, and we enjoyed working with Greg and Rocky (our install foreman.)

Geoff Abbott

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

I was very pleased with the work and quality. I highly recommend their business.

Jerry Arias

I have worked with one of the owners of Millennium windows and siding on two separate occasions. Once for windows and once for siding. He was very professional in all aspects, the job bid, the installation timeline, the quality of product and the follow up of customer satisfaction. His pricing was better than other competitor's bids which is why we went with him. I would enthusiastically recommend.

Connie Holland

Greg Davis and the Millennium team did an awesome job replacing a window in our basement bathroom from plate glass to tempered glass. I was really appreciative of their professionalism and timeliness since we asked them for just 1 window. They'll be replacing all our windows and sliding doors when do that.

Matt Genova

We had this company replace 4 windows and a patio door. We are very satisfied with the work they did. When we needed help in finishing the project, they came right back out immediately and gave us the assistance we needed without question.

Amy Herrick

Thanks Millennium for the amazing service and taking care of my home and concerns as if it your own. Look forward to doing more business with you in the future.

Megan Bierley

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 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

Their experienced sales team makes the buying process less stressful and easy. They are very professional, knowledgeable and affordable. I highly recommend Millennium.

Luciana Zachman

These guys were professional, knowledgeable and quick. I'd recommend them to anyone who needs siding.

J Woodard

I have worked with Greg from Millennium and he is a fantastic person. He is professional, honest and truly cares about people. I would highly recommend him and Millennium.

Clement Hayes

Millennium Windows and Siding is a true professional company. Millennium is the only company I will allow to work on our projects. High quality products and instillation. I receive many compliments from our customers about their experience with Millennium. I highly recommend Millennium for anyone looking for a quality product and service and a fair price and value.

Windows Aplussubs , Project Manager A+ Sub contractors

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.

James S.

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

Derek C.

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.

After serving with Ethan Burke in the United States Navy for 5 years, I was able to see with my own eyes how professional, responsible, and reliable he is. His honesty and integrity are completely out of this world. After hearing about this new opportunity that he has encountered, he seems incredibly knowledgeable about this business, and I would highly recommend him to any of my family or friends for business. You could not ask for better service, when asking for Ethan Burke.

Cody M.

I called Millennial Windows right after the hail storm and the owner and his son came out to give me an estimate that day, what a relief that was. We discussed options and I was able to choose the perfect windows for my house. The price was so good that the insurance adjuster was able to approve the work before he even came out to due the inspection himself. This allowed me to get the process started weeks before i would have been able to if i had to wait on the insurance guy. They were very professional and explained the process in detail. I had roof damage as well, but I didn’t want to rely on a roofer to do the windows, I really wanted window experts to do them. I am so happy that I was able to have a choice like this and I know I will be extremely satisfied with the work. I look forward to having more work done by them in the future. Thank you to Greg and Ethan, keep up the good work.

Matty

Millennium Windows & Siding is the only window company I do business with. They are honest, ethical and reasonably priced. I highly recommend them!

Natalie M.

If you need your window or sidings replaced, these guys know what they're doing and 99% of the time beat out there competitors. Give them a call, you wont be disappointed.

Ace L.

Their experienced sales team makes the buying process less stressful and easy. They are very professional, knowledgeable and affordable. I highly recommend Millennium.

Luci Z.

Thanks Millennium Windows and Siding! You made my experience less stressful then I could have imagined. Being able to work with you on the two biggest projects with my new windows and siding purchases was easy and nice to work with one company. Look forward to doing more improvements with you in the future. Thank you!

Megan B.

These guys helped me out after the last hailstorm, and I couldn't be happier with my experience. Their knowledge was a comfort and their professional attitudes made having them work on my home a stress free experience.

J.W.

I was a customer of Millennium Windows & Siding before I ever started working for them. I appreciated their honesty, integrity and great prices...so when they mentioned they were hiring; I knew that they would be a great place to work! My intuition was correct, I love it here.

Cindy H.

The installation of our 2 patio doors did not go as smoothly as anticipated. After explaining our problems to Greg, one of the owners, he became very concerned. So much so that Greg, and another owner, Adrian, came to our home on a Sunday morning to fix the problems themselves. Adrian has a class A license and is highly skilled. When they left our home both sets of doors worked and looked like a dream. I was impressed by their dedication and the high skill level of Adrian. The doors are very high quality. As long as Greg and Adrian are 2 of the owners of Millennium Windows and Siding I would recommend them to anyone.

Susan H.

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.

Jay W.

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

I have worked with Greg 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. Great company. Highly recommend!!

Satisfied Homeowner

Greg's crew arrived on time. Got the work done in just a few hours. Home is much more comfortable now.

Satisfied Homeowner, Denver Metro Area

From when we first met Greg Davis, he did a terrific job really listening to us and providing all of the best options we had within our price range. Where Greg and Millennium really shined was in the follow-up process. There was constant coordination and communication which he oversaw with the installers and made sure all the work was backed up. We would definitely recommend working with Greg and the guys at Millennium.

Mike J.

I shopped 3 different companies to compare which would be the best fit for me. The first company I met with was Millennium Windows and Siding. I met with the Owner who was extremely friendly, patient and knowledgeable which I appreciated. After meeting with the 2 other companies it was an easy decision to work with Millennium. I received a fantastic price and the quality of windows was impressive. The work was completed in just over 5 weeks and the install was seamless. I highly recommend Millennium Windows and Siding. Great overall experience.

Laura Yates

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!

Satisfied Homeowner, Denver Metro Area

Extremely well. The team members responded in a timely manner and all of my windows were done in a short amount of time!

Satisfied Homeowner

It went great called them up and set up a scheduled time with them and the day of installation they were on time did clean work they picked up after themselves I had no issues they were very professional and finished right on time.

Satisfied Customer

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