HVAC Contractor Permit Requirements in Stamford, CT

1. EIN (Employer Identification Number)

   Required if you have employees or operate as an LLC or corporation. Free from the IRS.

   Official government source

   Free·Immediate (online application)

   Free

   Immediate (online application)

1. Connecticut Department of Revenue Services — Sales Tax Permit

   Required for all businesses selling tangible personal property or taxable services in Connecticut. Connecticut charges a 6.35% state sales tax and taxes certain services (broader base than many states). Register with the Connecticut Department of Revenue Services via myconneCT; a $100 registration fee applies.

   Official government source

   $100 (registration fee)·Immediate (online via myconneCT)

   $100 (registration fee)

   Immediate (online via myconneCT)

2. EPA Section 608 Certification (for refrigerant handling)

   Federal law requires that any technician who purchases or handles refrigerants must be certified under EPA Section 608. Certification is required for all work on equipment that uses refrigerants (air conditioners, heat pumps, refrigeration systems).

   Official government source

   $20–$100 (exam)·1–2 days

   $20–$100 (exam)

   1–2 days

1. Connecticut Department of Consumer Protection - Heating, Piping and Cooling Contractor License (G-1)

   HVAC work in Connecticut is licensed by the Department of Consumer Protection under CGS Chapter 393. The contractor class DCP actually uses for heating, piping and cooling work is G-1, with G-2 for journeypersons; sheet metal work is a separate license category, so 'S-1/S-2' is not DCP's designation for an HVAC contractor. Only individuals may apply - DCP does not accept company applications - and the applicant must pass a trade examination given by DCP's exam vendor. Technicians who buy or handle refrigerants must also hold EPA Section 608 certification under 40 CFR Part 82.

   Official government source

   $150 non-refundable initial contractor license fee and $150 annual renewal set by CGS Sec. 20-335 (journeyperson $90 initial, $120 renewal); the exam vendor charges a separate fee at exam registration·All heating, cooling and sheet metal licenses expire annually on August 31, so the first term is prorated; the license issues once the applicant passes the DCP trade exam

   $150 non-refundable initial contractor license fee and $150 annual renewal set by CGS Sec. 20-335 (journeyperson $90 initial, $120 renewal); the exam vendor charges a separate fee at exam registration

   All heating, cooling and sheet metal licenses expire annually on August 31, so the first term is prorated; the license issues once the applicant passes the DCP trade exam

2. Stamford Certificate of Occupancy and category-specific permits (no general business license)

   Stamford requires no general business license, and Connecticut has no statewide one - so nothing is issued annually to be displayed at the place of business. What Stamford does require is a Certificate of Occupancy for the premises from the Building Department, plus whichever category-specific permits fit the business. The city's Permits and Licenses catalogue lists Building Department permits (building, demolition, zoning, signs, temporary tents, contractor registration), Engineering excavation and obstruction permits, and Department of Health licences (annual food establishment, retail food store, mobile food establishment, cosmetology, massage establishment, hotel/motel, public pool, multiple family dwelling, rooming house, refuse trucks). Note the Building Department sits under Operations; Economic Development is a separate office that issues no permits.

   Official government source

   No general business license fee exists; Building, Engineering and Health permit fees are set per category by Stamford's adopted fee schedules·A building permit must be issued or refused within 30 days of application (CGS Sec. 29-263(a)); Health Department licences such as food and cosmetology run annually and require plan review and inspection before issuance

   No general business license fee exists; Building, Engineering and Health permit fees are set per category by Stamford's adopted fee schedules

   A building permit must be issued or refused within 30 days of application (CGS Sec. 29-263(a)); Health Department licences such as food and cosmetology run annually and require plan review and inspection before issuance

3. Stamford Mechanical (HVAC) Permit - per project

   A mechanical permit must be obtained from the Stamford Building Department for each HVAC installation, replacement, or major repair, and a final inspection is required at completion. Connecticut has no county government, so no Fairfield County department issues building or mechanical permits.

   Official government source

   Calculated from the value of the work under Stamford's building permit fee schedule·Issued by the Building Department after plan review; inspection required at completion

   Calculated from the value of the work under Stamford's building permit fee schedule

   Issued by the Building Department after plan review; inspection required at completion

Official Sources

• Connecticut Department of Consumer Protection — S-1/S-2 HVAC Contractor License
• City of Stamford Department of Building, Land Use & Economic Development
• EPA Section 608 Certification

Related Guides