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Home improvements are an ideal investment for homeowners. It's a way to increase your home's value as well as improve your home's energy efficiency and quality of living. J. C. Tonnotti, JCT, offers a variety of home improvement services ranging from installing siding, replacement windows, doors, to painting, and power washing, remodeling, and much more!

J.C. Tonnotti is a family-owned and operated home improvement company that has helped homeowners across the state of Connecticut transform their homes.
Services
Since 1979 the J. C. Tonnotti Window Company Inc. has been a family-owned and operated general contracting business in Southington, Connecticut. The company specializes in exterior home improvements geared to increasing your home's energy efficiency and retaining its value. In addition to replacement windows and replacement doors, J.C. Tonnotti has expanded to include an array of home improvement services and Old Yankee Painting.
J. C. Tonnotti's home improvement services include quality product recommendations, exceptional contractor installations, renovations, and repairs. All of our crew are trained and qualified. Read about our quality guarantee.
The home improvement staff at J.C. Tonnotti Window Company are Energy Efficient Experts. They sell ENERGY STAR products and provide services to create energy efficient houses; whether they are new, old, beautiful, or drafty New England homes. Read about "Energy Efficient Exterior Home Improvements: An Interview with J.C. Tonnotti Window Company" by Kristen Bosse.
As an authorized re-seller of Harvey replacement windows, customers will find the right windows to suit their homes and budgets. J.C. Tonnotti is one of the largest dealers of Harvey replacement windows in Connecticut. ENERGY SAVINGS: Did you know having Energy Star windows greatly reduces heating and cooling costs?
Reviews (23)
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Debi Stevenson
May 21, 2022
It was great working with JC Tonnotti's! They gave me great choices and designed the picture window I wanted. The office was always responsive to my questions and the installers, Chris and Mauricio, were pleasant, efficient, and they cleaned up everything! Service: Window installation
Aileen Zappone
Mar 20, 2022
We had a front screen door as well as a smaller kitchen and large living room and kitchen window installed in January 2022. The installers were here for 6 hrs and everything was done efficiently and professionally. You wouldn't know they had even been here! Cleaned up nicely when they were done. Joe came to see us before the work was done and went over everything.

We have already noticed how much warmer our home is.on top of how wonderful the windows and door look. Would highly recommend them for your home improvement needs. Thank you!
Rick Usifer
Feb 22, 2022
My three-star review is not as much about the work that JC Tonnotti did as the poor quality of the Harvey windows they recommended and installed. We ordered the windows last year from JC Tonotti, and I have to say they did an excellent job on the installation. They were very professional throughout and left the house spotless, and the install looked good.

There were some issues with the staining on the trim which they stood behind and resolved. However, the Harvey Majesty windows we got are surprisingly poor quality. They're all drafty. Right now I'm standing near one and I can actually feel cold air seeping through the frame. It's 15 degrees outside, no wind, and the temperature in the house went down 4 degrees in an hour.

The vinyl ones we had to put in the bathrooms are even worse. I asked them to put plenty of insulation around them so I have to believe it's the windows themselves that are the problem. I'm not sure what can be done about this at this point, but I'm just writing this to warn other about Harvey windows - never again.
Antoinette Carey
Feb 19, 2022
J C Tonnotti replaced all the windows in my house. From the initial meeting to the installation of the windows, it was clear that this is a reputable, professional company focused on the client. Chris and his crew clearly were expert installers but were also very respectful. Although it was a cold day in February, they worked quickly and efficiently to avoid excess heat loss! When they left the house, each room was as clean as when they entered. Beautiful windows, excellent company.
William Lyon
Jan 27, 2022
Tonnotti Window Co. recently replaced my Fixed French Exterior door with a Harvey Sliding Door. I am very satisfied with the quality of the door and the expert workmanship of the installation. I found them to be a great contractor and would definately use them in the future. Service: General door installation
Thomas Picarelli
Jan 26, 2022
After having two windows leak I called J C Tonnotti. They were able to come and inspect my damage. Joe recommend a cost effective solution and the office called me to schedule my repairs. The work was done by Chris and one other employee, I apologize that I forgot their name. They were both professional and efficient. They got the job done in the time estimated. I know for any further window work I will make J C Tonnotti my first call.
Terri Miller
Jan 13, 2022
I had an amazing experience with JC Tonnitti Window. Their crew is very professional, work very efficiently clean and on time. The quality of their craftsmanship is incredible. The woodwork that surrounds the windows and doors they installed for me is absolutely beautiful. I am so impressed and so thoroughly happy with my decision choosing them to do the work in my home. They are an amazing family business.
Robert Maguda
Dec 05, 2021
Came out for the estimate in a timely manner and provided a competitive quote. An install date was provided and they called the day prior to confirm the install time and showed up the next day right on time. I'm a lifelong DIY person so I'm really fussy about the quality of work, and I have to stay I was impressed with the care taken to make sure everything was done correctly, I have no problem recommending them and will use them again.
Marc Russell
Oct 27, 2021
We used the company to remove & replace drafty front door, leaking very large picture window in front of house, and shutters for exterior refresh. Team on the job was mature, adequately staffed, and clean with no problems couldn't work through logically. Communication was clear. House looks 15-20 years younger states the neighbors. Recommended
Marc Russell
Oct 17, 2021
We used them for new front door, window casings around the door, large large picture window in front of the house., and shutters for front of the house. They came close to the quoted timeline in challenging supply chain times and were clean, efficient, and organized on the job. House looks refreshed said the neighbors.
Sylvia Squires
Oct 17, 2021
We were very pleased with all the employees of J. C. Tonnotti we have had contact with from the sales person to the office staff to the installers. The quality of the windows and door as well as the workmanship when your crew came to install them last month was obvious. They arrived promptly, reviewed the rooms where the installation was to take place, and got right to work.

They were organized, respectful of our property, diligent workers, and cleaned up completely before leaving; in other words, professional. Any interactions with your workers was polite. The crew leader gave us a clear demonstration of how the windows work for cleaning, etc. All in all, it was a very positive experience and we have already placed an order for more windows and another door to be replaced by J.C. Tonnotti.
Cheryl Everson
Oct 09, 2021
This was the second time using JC Tonnotti to finish our windows. They do such quality work, professional and friendly staff, and An overall great experience! We highly recommend them for all of your window needs!
Michael Sapack
Oct 06, 2021
We used JC Tonnotti for replacement of all of the windows in our house (26 windows plus sliding door). Their estimate was fair, the quality of their product (Harvey) excellent, and the entire process went smoothly, from quotation to ordering to delivery and installation. High praise for the sales person, office staff, Joe himself, and the installation crew.

Every one of the people who came to tear out and install the windows was pleasant, contientious and courteous, making the 2-day installation process as painless as possible. The quality of the work is excellent, and we will be reaching out for other projects in the future!
Michael Sapack
Oct 05, 2021
We recently had JC Tonnotti replace all of the windows (26 plus sliding door) in our home, and we were amazed at the efficiency of the installation crew. In one day they had all of the old windows out, and the new ones installed. Second day they install the trim and it was done. They cleaned everything up so you could not even tell that they. were there.

Everyone from the sales person to the office staff to the installers were pleasant, helpful and always on-time. We definitely recommend JC Tonnotti as a class company that does excellent quality work at a reasonable price.
Kathleen Norwood Crisafi
Sep 28, 2021
I always recommend JC Tonotti. This was my 2nd time using them and love my new windows. Staff is responsive, knowledgeable and polite. Keep up the good work!
Joe McAndrew
Sep 25, 2021
We had 9 windows and front door replaced! Excellent service from start to finish. Installers were polite and thorough. We would certainly call for future projects. Service: Window repair
Donald Amnott
Sep 05, 2021
We had all of our windows replaced and the entire experience was great. They completed the project in one day. The whole crew was courteous, professional and extremely hardworking. I highly recommend JC Tonnotti for replacement windows. Service: Window installation
Jennifer Zakrzewski
Sep 04, 2021
Very nice that the owner comes out and does the estimating. However, the positive experience stops there. If you want to overpay for shoddy and poor workmanship, then use Tonnotti. Damaged my walls, didn't caulk where they removed trim, and put back broken trim in several places. Tonnotti changed my contract unilaterally by deciding that he wasn't going to do certain work because I am having siding done with no credit or consideration for that. Very thankful they are not doing my siding!
Joy Forristall Hancock
Aug 23, 2021
I had 9 replacement windows installed. The employees, Chris and Carlos did an excellent job. They were professional, knowledgeable, polite and completed the job, cleaning everything up when they were done. My windows are beautiful and it was great to not have rattling, drafty windows while storm Henri plowed through the state. My windows held up beautifully. I highly recommend J.C. Tonnotti, great staff and they answered all my questions.
Mira Skuka Picchioni
Aug 16, 2021
I am very pleased with the work this company does. The ppl who work for this company are Very professional. Very clean. Very thorough. Explain everything. They have made me a very happy customer. The work they do is meticulous. I recommend this company 100%. Thank you for the great work you do.
Charles Terry
May 07, 2021
A couple of weeks ago we had a new patio door installed by JC Tonnotti Window Company. Joe was fantastic helping us choose a very nice door for the space. What a difference this new door makes! We were absolutely pleased with the communication from LeAnn in the office and most of all the installation was seamless! Both Mike and Carlos were very. polite, efficient, courteous, safety conscious and were neat and clean during the whole installation process. They answered all of our questions. We are extremely satisfied and highly recommend this company for all your home improvement needs!
Joanna Nicole
Apr 17, 2021
Joe and his team are extremely professional and do high quality work. We love our new bow window so much we are asking Tonnotti Windows back to do the rest of the house's windows! Thank you Joe and team for a great job from start to finish.
Nicholas Piotrowski
May 21, 2020
I like to take this opportunity to review my experience with JC Tonnotti. Several months ago, I had Joe and his crew replace 26 windows, 2 entry and 2 storm doors as well as the siding on my 82-year-old home. I knew there was likely going to be issues with rot on an exterior wall and wanted a company that would be able to handle any framing or other unexpected issues which may arise without having to bring in any additional outside contractors.

I met with six competitors and received estimates. I either felt the estimates were inflated for comparable products or, frankly, felt uncomfortable with the thought of most of these vendors accomplishing what they proposed to my satisfaction based on our conversations. Although I saw several lackluster online reviews, I found Joe to be straight forward throughout the process and fair with any incidental costs.

He met with my wife and I multiple times over the course of several years, was patient and at no time resorted to any high-pressure sales tactics. Steve managed the two crews and was always easily accessible even outside of business hours. Dave, Mike, and the rest of the guys helped expedite the job by working on a weekend to keep the project on schedule when the aforementioned rot issues came to fruition. Additionally, during the pandemic, our 8-year-old daughters educational process was forced outside during the construction process with the implementation of remote/ distance learning.

Never once did I or my wife hear the guys swear or talk inappropriately. Finally, Rachel and Faith were pleasant and handled any billing, rebate, or warranty issues. I consider myself a knowledgeable and self-sufficient person and typically cringe at the thought of others working on my house or automobiles. The magnitude of this project was simply out of my scope given my family and work demands.

My experience with J.C. Tonnotti was as seamless as I could have possibly expected with any issues being collaboratively discussed by both parties and implemented to my satisfaction.