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HVAC Companies in Suffolk County

Suffolk heating and cooling shops from Huntington out to Riverhead and Quogue, sorted by township, each with a link to Suffolk's license search.

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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.

Suffolk heating and cooling contractors, by town

Town of Huntington5 contractors

Town of Brookhaven2 contractors

Town of Southampton2 contractors

Town of Islip1 contractor

Town of Riverhead1 contractor

Hiring in Suffolk County

How do I check a Suffolk contractor's license?

Search Suffolk Consumer Affairs' online license database, or call (631) 853-4600, which also tells you about open complaints. Running a home improvement business in the county without a license is illegal, Suffolk says.

Does Suffolk license HVAC technicians separately?

For some work, yes. Suffolk issues a restricted plumber's license for HVAC piping and restricted electrician licenses for HVAC and for oil and gas burning equipment. Tying into the water supply or the gas service is reserved for a licensed master plumber.

How many estimates should I get?

Suffolk Consumer Affairs advises getting three written estimates before hiring any contractor.

Sources, checked October 2026

  1. Suffolk County Consumer Affairs, Licensing
  2. Suffolk County Consumer Affairs, Type of License
  3. Suffolk County Consumer Affairs, Home Improvement Fact Sheet (revised 10/16/24)
  4. Suffolk County, Code of Rules Governing Licensed Plumbers (HVAC restricted license)
  5. Suffolk County, Code of Rules Governing Restricted Licensed Electricians (rev. 10/2013)
  6. NYS OTDA, HEAP Local District Contacts
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