New York to Delaware: master HVAC technician license reciprocity

How local licensing works. With no state HVAC board, each jurisdiction that regulates the trade does so under its own code, usually as a business license with insurance and experience requirements rather than a trade exam. Buffalo is the exception with an examined heating contractor license.

New York City. The Department of Buildings issues no HVAC, mechanical or refrigeration contractor license; mechanical work is done under permits without a trade license, and the general contractor registration ($300 for three years) applies only to builders of one- to three-family homes. Oil-fired equipment must be installed by a DOB-licensed Oil Burner Equipment Installer (Class A or B; written exam $585, practical exam $530, $100 license for three years), and any refrigerating system that needs an FDNY permit must be supervised by a holder of the FDNY Q-01 Refrigerating System Operating Engineer Certificate of Qualification (EPA Universal certification, a 200-hour course or one year of qualifying experience or a boiler engineer, marine engineer or PE license; $60 plus $225 exam fees; three-year renewal $15). Neither recognizes out-of-state HVAC licenses.

Buffalo. City Code Chapter 238 makes it unlawful for any person to install, erect, alter, repair, service, reset or replace any heating or process system without a license from the Board of Heating Examiners; the separate City contractor license 'does not allow for plumbing, heating, cooling or electrical work'. Applicants must be at least 21 and have two years of practical experience installing heating equipment, a recognized school course plus one year, or be a graduate engineer; they submit photo ID, employer letters and a list of twenty completed installations to the Office of Fuel Devices, and if approved sit the Heating Contractor's Examination (offered roughly every three months, covering local ordinances and ASHRAE material). Classes: I (oil, gas or solid fuel), II (gas or solid fuel), III (wood-burning fireplaces and stoves). Fees: $50 non-refundable testing fee, $500 license, $500 annual renewal; a $10,000 bond to the City and certificates of $1,000,000 general liability and workers' compensation insurance are required. The license may be held by an individual, partnership or corporation. No reciprocity provision.

Rochester. Licenses stationary engineers and refrigeration operators (plant operation), electricians and plumbers; no HVAC contractor license.

Westchester County. The June 2025 amendment to the Consumer Protection Code requires 'all HVAC professionals' to be licensed through the Department of Consumer Protection as of July 1, 2025; the vehicle is the county Home Improvement Contractor license ($750 application fee effective January 1, 2026, $100 optional expedite, roughly 60 business days of document verification and background investigation, no exam). The county's examined trade licenses cover only plumbers and electricians.

Nassau County. Contractors installing or replacing 'central heating or air conditioning systems' in residential property need the county Home Improvement license: five years of recent verifiable experience, an establishment in New York State, liability, property damage and workers' compensation insurance, $650 for a two-year license plus a one-time $50 restitution fund contribution, $110 late renewal fee; no exam.

Suffolk County. Home improvement contracting expressly includes 'ductwork for heating, ventilation and air-conditioning systems'; the county Home Improvement license requires public liability and property damage insurance of at least $500,000 per occurrence and workers' compensation, a $200 application fee and $200 annual license fee ($50 temporary 90-day license); employees of licensed contractors are exempt; no exam.

Out-of-state holders. No New York jurisdiction publishes a reciprocity or endorsement path for out-of-state HVAC contractor or master licenses. Buffalo requires its own exam; the counties require their own business license regardless of any license held elsewhere; New York City requires no HVAC license at all.