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.

picture window
arched windows
casement windows
replacement windows
garden window
patio doors

Millennium Windows and Siding is your formula for success!

Quality windows plus the window installation expertise and experience of Millennium Windows & Siding is the formula for a window replacement home improvement project that rates great reviews from customers.

Get a free quote today!


At Millennium Windows & Siding, you work directly with the owner eliminating the salesman's high commission.

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.


Our products are backed by our true 100% lifetime warranty* with no trip fee and no labor fee!

* Includes window frame, operators, seal and glass. Call (720)508-4385 for details.

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

Yelp 5 star rating
Google 5 star reviews
Angie's list
Angie's list
Better Business Bureau Accredited Business
Yelp 5 star rating
Yelp 5 star rating