J.C. Tonnotti

JC Tonnotti Window Company a name you can rely on

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, 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 Quality Craftsmanship

J.C. Tonnotti 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.

Let us help you turn your home improvement dreams into reality. Contact us today at 860-621-1642!

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$100 Off 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 is always here to help.

$100 Off Any Project


“I had all my condo windows replaced by J.C. Tonnotti. They were the least expensive & most professional window company I could have chosen!”

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Ethan Gombossy
“Our new windows are great, & for the first time in decades, I don’t feel a breeze coming through the windows! From start to finish, my husband & I are completely satisfied..."

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Maryellen & KevinForestville CT
“Thank you for doing an outstanding job with the windows, doors, sliders, emergency repairs, new siding, new gutters,  gutter guards, & fixing the water and wood rot damage!" 

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Patricia & George C. from Manchester, CT

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JC Tonnotti sells and installs Harvey building products

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.