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 efficient! Came on time. Returned with finished cover as promised. Great advice as to maintaining upkeep of window as also the well. Thank you!"
+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
"F and A did a fantastic job cleaning our windows and doors! The communication was great, they arrived on time and cleaned every glass surface, sills, and screens until they looked almost new. It was wonderful to walk into the house and see the sun and plants through sparkling clean windows. We will hire F and A to clean our windows every spring!"
+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 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 2004
Free estimates
Emergency services offered
"I am very pleased with my new windows. I used Home Genius Exteriors to do my roof, gutter protection, and now Windows. This is an absolute amazing company, my salesman brendan was very helpful, Devan the Project Manager helped make sure everything went smoothly. Walter and Mike also from production were very friendly and professional. And Shawn, the window installer was polite,knowlagable, and efficient. And even cleaned up on his way out. Next on the agenda is to get a new door taken care of. Highly recommend HGE"
Serving Cortland, IL and surrounding areas
Approved
In business since 1996
Free estimates
Emergency services offered
"Juaquin was excellent in providing quality service for my windows."
+58
Serving Cortland, IL and surrounding areas
Approved
In business since 1996
Free estimates
Emergency services offered
"They also cleaned my windows"
+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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