4.3 
78 *The Angi rating for Window Service companies in Cortland, IL 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 Cortland, IL 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 10, 2026
Serving Cortland, IL and surrounding areas
Approved
In business since 1957
Free estimates
Credit card accepted
"Very professional and got the work done as promised in a timely and efficient manner. Highly recommend them for your window well cover needs."
+9
Serving Cortland, IL and surrounding areas
Approved
In business since 2022
Free estimates
Warranties offered
"Weber’s Windows did an excellent job!!!"
+26
Serving Cortland, IL and surrounding areas
Approved
In business since 2010
Free estimates
Warranties offered
"Prompt and professional window cleaning. They went above and beyond and our windows looked great"
+31
Serving Cortland, IL and surrounding areas
Approved
Super Service Award Winner
In business since 2001
Free estimates
Warranties offered
"The installers were wonderful. Friendly, knowledgeable, fast and CLEAN! Youâ d barely know theyâ d been there!. And our sales person really helped us understand the best, but not most expensive windows for our house. If I need more windows they will be back!"
+20
Serving Cortland, IL and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Great Company. Fast Efficiant work. Shawn the Window Technician was great, and Devan who was helping him install and we learned that he was actually a Production Manager. Both were great. The completed all of our windows. 7 standard, and a picture window in less than two days. Great company. Great customer service. Shawn,Devan, and Lauren were all amazing."
Serving Cortland, IL and surrounding areas
Approved
In business since 2002
Free estimates
Warranties offered
"It was very professional the installer answered all my questions as his was removing the windows and showing were damage was on the old windows and how much more efficient the new would be . Ià ¢à  à  m very please with my new windows I would recommend them"
+7
Serving Cortland, IL and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 2007
Free estimates
Warranties offered
"Renewal by Andersen of Wyoming did an incredible job with installing windows in our home. Thank you to the team who did the install and to the company for creating these exceptional windows."
+2
Serving Cortland, IL and surrounding areas
Approved
In business since 1996
Free estimates
Emergency services offered
"They cleaned our 8 Pane windows on our two story 1940â  s house perfectly with the exception of one window which it seems they forgot and I missed when I inspected before they left. The guy that came out was professional and did great work. He stuck with our original quoted price even though upon arrival he realized that this was an old house me with multi pane windows and outdoor storm windows on each. Windows looks ok great and I will give a second review after I hear back on the missed window from the company"
+58
Serving Cortland, IL and surrounding areas
Approved
In business since 1996
Free estimates
Emergency services offered
"Prompt, courteous service. The washer told me which windows he would suggest replacing which will be a large savings for me. I would definitely recommend them and use them again."
+85
Serving Cortland, IL and surrounding areas
Approved
In business since 2005
Free estimates
Credit card accepted
"We have once again reached out to Joe Kim at J & K Home Improvements when we had a new project planned. We were completely satisfied when we replaced our siding and roof with Joe. Now Joe and his professional crew have replaced all our windows . There are never surprises or additions from when the job is quoted. Once again we are totally satisfied and delighted with their work!! It has been a stress free experience each and every time."
+2
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