J. C. Tonnotti

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!

JCT Quality Craftsmanship

J.C. Tonnotti is a family owned and operated home improvement company that has helped home owners 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 a 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
“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
“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

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Harvey Building Products and replacement windows installedAsk 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.