4.5 
320 *The Angi rating for Window Service companies in Longmont, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window Service needs.
*The HomeAdvisor rating for Window Service companies in Longmont, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window Service needs.
Last update on May 20, 2026
Serving Longmont, CO and surrounding areas
Approved
In business since 1997
Free estimates
Warranties offered
"Centennial Window Films did a great job, highly recommend!!"
+19
Serving Longmont, CO and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1992
Free estimates
Warranties offered
"I had nine windows replaced. All of the people from Power were wonderful to work with. The windows have all of the features I was looking for. Installation was quick and efficient. I’m very happy with my experience."
+28
Serving Longmont, CO and surrounding areas
Approved
In business since 2000
Free estimates
Warranties offered
"Next time you walk by an egress window on one of these flipped homes - check out the workmanship - crooked, leaking glue out the sides, certainly no permit. I know this because I have witnessed it AND I called one of those "cheap" window people for an estimate (notice how they are ready at the drop off a hat and then drop out of sight when there are problems? The window placed by Egree Inc is perfect. Was it more expensive - not much more than as egress window placed in 2013 that was equal in quality. It was also permitted, inspected, and sits level without leftover glue seeping out the sides. Was there a wait time - not more than I would expect from any quality provider. I was kept informed on the timeline and the window was completed as promised. BONUS - the workmanship is guaranteed and the company will be around to stand behind the workmanship. Excellent work."
+12
Serving Longmont, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2019
Free estimates
Warranties offered
"Great customer service from the start. Work was completed on time and quickly and efficiently! Got quotes for other windows to be replace and will be using them in the future. Highly recommend!!"
+20
Serving Longmont, CO and surrounding areas
Approved
Super Service Award Winner
In business since 1995
Free estimates
Credit card accepted
"Very happy with the work. It gives us privacy and spares us from the sun glare."
+15
Serving Longmont, CO and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"Ben was courteous, personable, very professional and knows his trade., I was impressed with his applications of window tinting my four huge windows here in a timely and CLEAN manner."
Serving Longmont, CO and surrounding areas
Approved
In business since 1994
Free estimates
Customers say: Quality work
"Egress window installation was perfect."
Serving Longmont, CO and surrounding areas
Approved
In business since 2012
Free estimates
Credit card accepted
"This company worked to help us get this project done quickly. They also called us 30 minutes before arriving which is helpful when you need to go other things done. Our windows are so beautiful! They cleaned the windows, the skylights and the tracks around the windows. Great price also!"
Serving Longmont, CO and surrounding areas
Approved
In business since 2002
Free estimates
Emergency services offered
"Great job. They came when they said they would. They did a nice job on the windows. They were efficient and came in at the agreed upon amount. This was a good savings over others who estimated the job."
Serving Longmont, CO and surrounding areas
Approved
In business since 2018
Free estimates
Warranties offered
"Efficient, so easy to work with and custom designed our window wells to fit perfectly.. Safety was our concern, and Window Well Guardian delivered ! 10!"
+27
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