HVAC Companies in Suffolk County

This list is built from Google Maps listings that had a Suffolk County address when we took our October 2026 snapshot, so ratings and review counts reflect that date. Inclusion is not a recommendation, and any paid placement is marked Featured on the card.

Suffolk licenses more of the HVAC trade at the county level than Nassau does. Consumer Affairs issues the home improvement license, which in Suffolk’s code includes HVAC ductwork, and its licensing boards issue the plumbing and electrical licenses, including restricted licenses written for heating and cooling work. Suffolk Consumer Affairs licenses over 15,000 vendors, and more than half of the licenses it issues or renews each year are home improvement licenses. For which license fits which job, read how to check an HVAC license.

On the East End, ask any company how far it travels before you book; a shop in Huntington and one in Quogue cover very different ground. Suffolk’s HEAP office, listed by OTDA, handles heating assistance for the county.