4.5 
1.2k+ *The Angi rating for Window And Door Contracting companies in Thornton, CO 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 Thornton, CO 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 August 12, 2026
Serving Thornton, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Emergency services offered
"Window well covers look fantastic and the job was done quickly and efficiently. Would definitely recommend."
+17
Serving Thornton, CO and surrounding areas
Approved
In business since 2015
Free estimates
Customers say: Quality work
"Bruce Hahn was excellent in keeping us informed to when installation would begin and end The crew cleaned up after and we're very happy with our new doors and windows ?"
+67
Serving Thornton, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2019
Small jobs welcome
Credit card accepted
"excellent work. Solved a tough, unexpected problem with my storm door. RJ is friendly, knowledgeable and despite being very busy, He found time for my small project. Really appreciated working with these guys. I’ll be contacting them again soon for other projects!"
+110
Serving Thornton, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2013
Free estimates
Emergency services offered
"They repaired our bent patio screen door and re-screened the patio screen door. And they also re-screened a window screen. The screen door works perfectly now."
Serving Thornton, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Small jobs welcome
"Jose came the very next day after I requested quotes. He did a great job and went above and beyond when we had storm windows to wash as well as regular windows."
+68
Serving Thornton, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2001
Free estimates
Small jobs welcome
"David did an excellent job installing an interior door for a master bathroom. His craftsmanship and attention to detail was top notch. The finished door, trim, hinges and privacy door knob all perfectly matched our existing interior doors. I enjoyed working with him and would not hesitate to hire him again for future projects."
Serving Thornton, CO and surrounding areas
Approved
In business since 1998
Free estimates
Warranties offered
"Paulo and his team were excellent. At first I was weary with the price of James Hardy Siding, but once it installed my house was transformed. They exceeding my expectations and have received numerous compliments from my neighbors and from people just passing by as the house stands out! After the hail storm, I also requested that Paulo and his team replace the roof. Once again, they were right on it and did an excellent job. I am now remodeling the inside of my house and I would not consider going with anyone else but Paulo. I forgot to mention that he also replaced all the windows in my house and I requested that he extend my front patio. He is a jack of all trades and we are very happy with his work."
+116
Serving Thornton, CO and surrounding areas
Approved
In business since 1986
Free estimates
Emergency services offered
"Technician also corrected long standing problem with an original door jamb for the entry door"
+15
Serving Thornton, CO and surrounding areas
Approved
In business since 2017
Free estimates
Warranties offered
"I was very pleased with Colorado Siding Repair. They were very professional. The teams were always here on time, cleaned up every day, kept me informed of the status of the project, and friendly. The work was excellent- attention to detail, made sure everything was done right, and the house looks beautiful! I would definitely recommend them."
+95
Serving Thornton, CO and surrounding areas
Approved
In business since 2018
Free estimates
Credit card accepted
"They replaced the screens in my patio doors and they look great."
From average costs to expert advice, get all the answers you need to get your job done.
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