3.7 
70 *The Angi rating for Window And Door Contracting companies in Union, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
*The HomeAdvisor rating for Window And Door Contracting companies in Union, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
Last update on July 08, 2026
Serving Union, CT and surrounding areas
Approved (Corporate)
In business since 1992
Free estimates
Warranties offered
"Did windows, doors and gutters and we are very happy!!"
+41
Serving Union, CT and surrounding areas
Approved
In business since 1961
Free estimates
Warranties offered
"We really like our new windows and sliding glass door. They were very professional and did nice work. Everything looks great!"
+40
Serving Union, CT and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"We actually hired them for several projects: Roofing, Siding,, windows and doors, gutters, trim etc. each project team was highly skilled for the project and work was completed correctly the first time. Great service from sales, project management and all the departments to get the project completed on time. Communication was excellent. Happy customer with a now beautiful home."
Serving Union, CT and surrounding areas
Approved
In business since 2010
Free estimates
Customers say: Quick response
"The service was prompt and thorough."
Serving Union, CT and surrounding areas
Approved (Corporate)
In business since 2000
Free estimates
Warranties offered
"I liked that there was no nonsense. Their salesman was straightforward and the price was fair. We were also impressed with the installers. They installed all the windows in 1 day and they look great. I'm happy I chose them."
+55
Serving Union, CT and surrounding areas
Approved (Corporate)
In business since 2007
Credit card accepted
Offers commercial services
"They were not able to fill our door space, and wanted us to make too many compromises"
Serving Union, CT and surrounding areas
Approved (Corporate)
In business since 1980
Free estimates
Emergency services offered
"Was very nervous hiring someone to do my roof. I’ve had bad experiences in the past. The salesman Nick met me at my home. Gave me in full detail a step by step breakdown of how the project was going to unfold. I just got my deck done a month prior. He assured me that everything would be covered, and the clean up would be thorough. On the day of my installation, not only was property protected. The owners of the company Zak, and Rich came out personally to bring insulation board to cover my railings of my new deck. I was very impressed with that, the detail and follow through with everyone involved with the project. My wife and I are planning to get the roof done on our rental property this year, and I know I only need to make one call to get the job done right. I highly recommend A1 Home Improvement for any outdoor project you have."
+3
Serving Union, CT and surrounding areas
Approved
In business since 1999
Free estimates
Emergency services offered
"I am looking for job and I do roofing and siding."
Serving Union, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2006
Free estimates
Emergency services offered
"Excellent service, clear detailed plans with diagram, and excellent updated sump pump system. I plan to have bilco doors put in my basement entrance by them soon. They are small company that cares about the customer."
+37
Serving Union, CT and surrounding areas
Approved (Corporate)
In business since 1991
Free estimates
Credit card accepted
Are you looking for the very best replacement window money can buy? You've found it with Castle Windows! Replacing your home's windows with high-performance Castle Windows is one of the wisest home improvement investments you'll ever make.\n\nCastle Windows is dedicated to saving you time, money and frustration. You can trust your custom-made windows from Castle Windows. Committed to producing the best product possible, Castle Windows confidently stands behind our work with a lifetime limited warranty to protect your window investment. \n\nFor over 30 years Castle Windows has been designing windows to fit your world. We offer a wide selection of top quality, custom-made windows to fit your home because we know you appreciate variety, expect quality and demand affordability. We are able to make a window to almost any specification including multiple colors, grid patterns or application without sacrificing quality or warranty.\n\nCall us today for your free estimate!\n
+13
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