J. C. Tonnotti Window Company

Home Improvement Contractors in Connecticut

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 Window Company, JCT, offers a variety of home improvement services ranging from installing siding, replacement windows, and doors, to painting, and power washing, remodeling, and much more!

Our Mission at J. C. Tonnotti Window Company is to exceed our client’s expectations by offering superior craftsmanship and outstanding customer service. “We measure our success by the relationships we build”

A Name you can Rely on

J. C. Tonnotti Window Company is a family-owned and operated home improvement company that has helped homeowners across the state of Connecticut transform their homes. Our customers all agree that working with J.C. Tonnotti is a positive experience and they are grateful for the level of quality craftsmanship and excellent customer service – you can see and hear their testimonials here.

Whether it’s installing energy-efficient replacement windows, replacing siding, revitalizing a home through painting and power washing, or refreshing an entryway with a new door system, we pride ourselves in putting our best efforts for each and every project.

J. C. Tonnotti Window Company

JCT offers a variety of home improvement services ranging from:

  • All types of vinyl and wood replacement windows
  • New construction windows
  • Vinyl siding including vinyl shakes
  • Patio doors, single entry and double doors
  • Remodeling services
  • Interior and exterior painting division includes aluminum and vinyl siding refinishing or painting and MUCH MORE!

Our customers agree that working with JC Tonnotti is a positive experience and the owner shares his in-depth, on-the-job experience with each and every homeowner and can always answer any questions the homeowner may have with TRUE FACTS!

Let us help you turn your home improvement dreams into reality.

Contact us today at 860-621-1642!

Customer Testimonials

Martha LanzaMartha Lanza
18:43 15 Apr 22
We are so pleased with the experience we just had with JC Tonnotti Window Co.!!From the quoting process to the building of our sunroom, we had only positive interactions with Joe and his TEAM. We have very high standards and we were impressed with their professionalism, excellent workmanship and punctuality. A very special thank you to Chris, Mike, Matt, Carlos, Mauricio, Dale, Steve and Gil for a job well done.Congratulations to Joe and Faith Tonnotti you achieved your company’s mission of, “exceeding your clients' expectations by offering superior craftsmanship and outstanding customer service "With gratitude,Martha and Octavio LanzaBristol, CT
Sylvia SquiresSylvia Squires
18:41 25 Mar 22
First Installation: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.Second installation:We recently had a second round of windows and a new front door unit installed by J. C. Tonnotti. The workers arrived on time, reviewed the rooms in which they were doing the installations and started right to work. They worked quickly and efficiently, leaving openings to the outdoors (in February) for as short as time as possible. One team member had to leave to pick up some additional materials which delayed their progress, but they stayed until the job was finished and completely cleaned up. Our house is much brighter and warmer thanks to the fine job they did.
Aileen ZapponeAileen Zappone
00:41 03 Mar 22
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!!!!
Danielle tyburskiDanielle tyburski
19:43 28 Feb 22
I love the windows and they are really beautiful and nice and they did a really great job installing the windows I my condoThank u for the awesome windowsDanielle TyburskiRichard & Lois Detuccio
Antoinette CareyAntoinette Carey
15:24 14 Feb 22
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.
Melissa CastilloMelissa Castillo
13:27 17 Aug 21
The staff is extremely friendly, the work they did on my window is absolutely amazing. 10/10 would recommend
J ENGLISHJ ENGLISH
11:11 08 Apr 21
MY EXPERIENCE WITH JC TONNOTTI HAS BEEN EXCELLENT FROM THE FIRST PHONE CALL - VERY PROFESSIONAL, VERY RESPECTFUL AND EXCELLENT WORKMANSHIP. MY HOME DISASTER WAS REPAIRED TOP NOTCH. I CANNOT SAY ENOUGH GOOD ABOUT THIS COMPANY.
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Any Home Improvement Project

Whether you are thinking about installing a new entry door system, replacing windows, installing siding, repainting your home, or undergoing a historic restoration, J. C. Tonnotti Window Company is always here to help.

Ask about our line of Harvey® Vinyl Replacement Windows, their expert designs, and premium grade materials. Harvey® is recommended to withstand the cold weather conditions of Connecticut winters and provide energy savings all year round. Read more about Harvey Windows.