Take a look at our past work!

Lifetime Windows & Siding

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Lifetime Windows is a reputable window replacement and installation company with a strong presence in both Colorado (CO) and Arizona (AZ). With a commitment to providing top-quality products and exceptional customer service, Lifetime Windows has earned a stellar reputation in the industry. In Colorado, the company serves residents in Denver, Colorado Springs, and the surrounding areas, offering a wide range of energy-efficient windows tailored to the unique needs of the region's diverse climates. Whether it's combating the harsh winters or scorching summers, Lifetime Windows has the expertise to provide customers with windows that enhance the energy efficiency and aesthetic appeal of their homes. Their skilled team of professionals ensures a seamless installation process and stands behind their work with warranties that give homeowners peace of mind.


In Arizona, Lifetime Windows brings its expertise to cities like Phoenix, Tucson, and Scottsdale, catering to the specific challenges posed by the arid desert climate. They offer a variety of window options that help keep homes cool during the scorching summers while minimizing energy consumption. With a dedication to eco-friendliness and energy efficiency, the company provides residents in both Colorado and Arizona with a valuable solution for enhancing the comfort, beauty, and value of their homes. Whether you're looking to upgrade your windows in the Rocky Mountain state or the desert oasis, Lifetime Windows is a trusted choice for homeowners seeking premium window solutions in CO and AZ.

Our Work

1557 Fillmore Street , Denver, CO, US
  • Infinity by Marvin
  • Infinity by Marvin: Sierra
  • Windows
5121 Mount Buchanan Avenue , Longmont, CO, US
  • Anlin
  • Anlin: White
  • Windows
12205 Helena Street , Brighton, CO, US
  • Infinity by Marvin
  • Infinity by Marvin: White
  • Windows
4539 South Ireland Lane , Aurora, CO, US
  • Infinity by Marvin
  • Infinity by Marvin: White
  • Windows
13564 Crystal Street , Brighton, CO, US
  • Infinity by Marvin
  • Infinity by Marvin: Ebony
  • Windows

Customer Testimonials

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ty lindsay
Price was good, salesman was great, installation was horrible. Project Manager Curtis won’t return calls or answer texts and salesman Curtis was pretty much non-existent after the sale was made. Buyer beware on this company!
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ty lindsay
Price was good, salesman was great, installation was horrible. Project Manager Curtis won’t return calls or answer texts and salesman Curtis was pretty much non-existent after the sale was made. Buyer beware on this company!
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Sandra Peters
We recently had all our windows replaced by Lifetime and couldn’t be more pleased. The new look really gives our house better curb appeal, and they’re sharp looking from the inside too. We notice the quiet already and will reap the thermal rewards next summer! Dante and John did an excellent installation job - they’re industrious, professional and super friendly. We’re awaiting a couple of small adjustments to be made. Overall, we’d highly recommend these windows.
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Sandra Peters
We recently had all our windows replaced by Lifetime and couldn’t be more pleased. The new look really gives our house better curb appeal, and they’re sharp looking from the inside too. We notice the quiet already and will reap the thermal rewards next summer! Dante and John did an excellent installation job - they’re industrious, professional and super friendly. We’re awaiting a couple of small adjustments to be made. Overall, we’d highly recommend these windows.
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Jen Minarsich
Wow! This was the best installation experience I have had during the remodeling of my home over the last two years! Adam and Martin were very professional and CLEAN. (That is always a plus.) My slider door is beautiful. Better than expected. Thank you!