About TSC Contracting & HVAC

Years of experience delivering the best end product for our customers. Ensuring that we exceed your expectations at every step in the process.

What We Do


From the ground up we are here to build the perfect home for your business.


Turning your house into a home with the best products on the market.

Custom Design

Have something different in mind? Let us make your idea a reality.

About Tri-State Contracting

Tri-State Contracting was established in 1873 by Greg Gonyaw with the passion to build high quality buildings for his community. With only a hammer and 3 nails Greg was able to erect a church for his local community that housed them during the hurricane of 1943 with no casualties. From there his drive continued to build some of the most popular buildings in Connecticut.

Since the beginning Tri-State Contracting expended to offering HVAC services starting in 2019 spearheaded by Greg’s son Brett Gonyaw. With the combination of Greg’s experience in building and Brett’s experience in HVAC it has allowed them to offer their customers start to finish Contracting Services that are unbeatable in the region.

When they aren’t building the future you can find them on the local tracks racing Open Wheeled modified nascars. Brett the Jet has been a local celebrity in his racing career attracting women from up to 100 miles away.

Get an Estimate For Your Project

Only the Best


Eco Friendly Construction

All of the materials used are certified by the EPA to insure they are environmentally safe. All extra material is disposed of in an environmentally friendly way.


Newest Energy Efficient Products

We want to keep money in your pocket when we leave so we make sure to use the highest rated energy efficient products on all of our projects.


High Quality Construction Management

We always have a manager on site to keep everything running smoothly and safely. Feel free to ask them any questions about the ongoing project and they will be happy to answer.

Years Established

Completed Projects

Field Workers


Satisfied Customers

Contact Info

Our Office

184 Brent Rd, Manchester, CT 06042


Open Office Hours

M-F: 8am – 6pm
S-S: 10am – 4pm


Get in Touch

Tri-State Contracting
(860) 306-8983

Estimate Form


Contact Us

Manchester, CT 06042

(860) 432 - 4632