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J.C. Tonnotti Window Company

New Haven Window Installers
Ranked #11 in New Haven | Grade B-
4.80 (294 reviews)

J.C. Tonnotti Window Company

Connecticut window and door replacement with options for siding, roofing, and cellar doors. The team focuses on durable installations that handle local weather while improving energy efficiency and curb appeal.

Why Homeowners Choose This Business

Connecticut-based team with strong reviews, a straightforward process, and products suited to New England weather. They prioritize fit, weather sealing, and clean finishes so upgrades look good and perform well.

Service Area

Serving Bridgeport and surrounding Connecticut communities from their Southington location.


How This Business Compares

A quick local comparison based on ranking, review strength, and market visibility.
  • Shows strong customer satisfaction signals based on review quality and volume.

Services Covered

  Renovation Services
  Roofing Contractor
  Supplier
  Installations
  Window Replacement
  Window Installation
  Vinyl Windows
  Energy Efficient Windows
  Entry doors
  Patio doors
  Siding Replacement
  Roof Replacement
  Cellar Doors
  Exterior Remodeling
  Storm Doors
  Window Trim

Window replacement and installation; entry and patio doors; siding and roofing; cellar door solutions; exterior trim and related updates.


Recent Reviews

4.80

(Based on 294 reviews)

High marks from customers for courteous crews, clear estimates, and workmanship that improves comfort and appearance.

We met with Mike for the initial consultation on replacing a kitchen and bay window. He was easy to work with, explained the entire process, accommodated all our needs and provided a competitive quote without any gimmicks or hassles. The installment was headed by Chris with Mauricio and Shaun assisting. Chris was very particular with his work and paid special to detail as were Mauricio and Shaun. They were all very friendly and courteous and constantly vacuumed and cleaned up during the entire process. We definitely recommend J. C. Tonnotti for your projects and will use them again as the needs arise.

We had our windows installed on January 19th and 20th during extremely cold weather, with snow covering the property, and JC Tonnotti Window Company was absolutely outstanding. They sent a crew of seven guys who did an amazing job managing the removal of 50-year-old wood windows and storm windows under tough conditions.

In total, 17 windows were installed, including a large picture window, and everything was handled efficiently and with great care. They were incredibly organized and respectful of our home — all interior floors were fully covered with drop cloths, they cleaned and vacuumed as they worked, and they left everything spotless at the end of each day.

Outside, the property was completely cleaned up and all debris and garbage were removed. The entire job was completed in just a day and a half, which was very impressive given the scope of work and the weather. The crew was honest, clean, knowledgeable, and professional from start to finish. We will absolutely recommend them to others and would not hesitate to use them again.

Replacement of some old garage windows! Did a fantastic job! Honestly flawless. Would highly recommend you can tell they are the real deal- clean work, attention to the details and great product options too the whole process went smooth.

J.C. Tonnotti replaced 28 windows for us approximately 5 years ago and they did a superb job of communicating, workmanship, professionalism, & cleanliness. Mike Hebert & the entire crew were outstanding & the price was very fair & competitive. Because of that incredible experience, we recently contracted them to replace our house and shed roofs, skylights, gutters, & assist us with some deck repairs. Once again they came through with flying colors and we are once again very, very pleased with the outcome. Mike Hebert & the entire crew were once again outstanding to work with and the process could not have gone any smoother. We were pleased to have a family owned company, well versed in several trades, in business since 1979, from my home town, reasonable & reliable to complete our needed work. Thanks a million to all of their happy & engaged employees that made these projects so successful.

It sounds like we are one of the rare customers that had a poor experience using J.C.Tonnitti. We had two sets of sliding doors replaced. We would not recommend.

What went wrong:
-The owner was not present on day of installation as many other reviews boast. The guy who appeared to be the project manager in charge of our project looked to be a kid in his early 20s. He must have been inexperienced which led to other issues, noted below
-We called ahead to see if we should be inspecting the doors when they were delivered. We were told that we did not need to and they would inspect them on installation. Apparently this was not done, because after the job was complete and the guy was looking to leave, I noticed defects in both panels of one of the doors. I regretfully only took a picture of the smaller blemish, but the larger one appeared to be a large scratch, but in fact was a defect on the inside of the glass panel. (See picture of small defect)
-We were contracted for a SPECIFIC size trim to match the house. During installation, my husband took the day off and was home all day. The project manager decided on his own without consulting my husband, who was home ALL DAY, to install a different WIDER sized trim and in doing so cut our baseboard trim, as well as one of our light switch panels. The trim ended up within 1 cm of the actual light switch and covered the other light switch housing unit, (see pictures). When we brought up our concerns about this, the owner gave us two possible solutions, one being they remove the wrong trim and replace with matching sized trim, or and he suggested the best option, and made it sound like it was easy, was for US to CUT A HOLE in our wall and move the electrical unit over (afterward, we had our electrician come to inspect it and he stated that the proper way to do this would be to remove the trim they put up, cut a hole in the wall to move the box over, seal the open wall that would have be left behind the wide trime, and replace the trim)
-They left a sawdust mess in the kitchen the day of install after cutting out our trim
-We had no idea ahead of time that we would need to paint/stain all of the trim involved, we believe we were paying for a complete job
-When the owner came out to inspect the defective door panels, he did not make a note of the second door panel, which had a small blemish (the one pictured). When they called us to replace the door panels, they had only scheduled to replace one. We needed to take pictures and have that rectified, which delayed replacing the defective doors
-We decided to have them re-install the trim we had originally contracted for, and when they removed the 5" trim with our matching 3.5" trim, they ripped up the drywall all around the door, which WE now need to repair (see pictures)
- The owner was also not present when the trim was fixed. Perhaps if someone who was experienced was there they would have thought to move our matching baseboard trim to the door and put small 1.5" wide pieces in the corners of the room where the trim isn’t even visible. I did not think of this until after the job was complete, and they had already disposed of our old baseboard trim.(see picture where the trim does not match)

What went right:
-The doors that we had installed were a huge upgrade from our previous set
-The company did make an effort to fix most of the issues
-The quote was reasonable compared to other quotes we received. Note, I do not know if the other quotes included completed trim or if they also expected us to finish the job and paint
-They replaced the incorrect trim without charging us

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This business may offer free estimates for some services.


Frequently Asked Questions

They offer a range of window styles and materials to fit different budgets and design goals. During a consultation, they review options for energy performance, finishes, and hardware to match your home.

Most single-day projects cover a set of standard windows once materials are ready. Larger or more complex homes may be scheduled over multiple days to ensure proper fit and finishing.

Yes, the team plans the sequence to minimize disruption and protect interior spaces. They maintain a clean work area and remove job debris at the end of each day.

They replace entry, storm, and patio doors and can coordinate trim and hardware updates. A visit can help you compare security, energy, and style options.

Call their office or use the website contact form to request a visit. They will measure, discuss goals, and provide a written proposal with scope and timeline.
 Verified Listing

Opening Hours


  • Monday 8:00 AM – 4:00 PM
  • Tuesday 8:00 AM – 4:00 PM
  • Wednesday 8:00 AM – 4:00 PM
  • Thursday 8:00 AM – 4:00 PM
  • Friday 8:00 AM – 2:00 PM
  • Saturday Closed
  • Sunday Closed

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Business Details


Business Rating
4.80 (294 reviews) FeaturedPro Business
Address
205 Bristol St, Southington, CT 06489
Phone
Business Type
general_contractor

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