HVAC Contractor Permit Requirements in New Haven, CT
Complete permit and license guide for starting a hvac contractor in New Haven, New Haven County, Connecticut.
Not legal advice. Requirements may change — always verify with your local government authority before applying. Last verified: .
New Haven / New Haven County Requirements
3 requirementsConnecticut Department of Consumer Protection — S-1/S-2 HVAC Contractor License
HVAC contractors in Connecticut performing sheet metal, heating, piping, or cooling work must hold the appropriate S-1 or S-2 contractor license from CT DCP. EPA Section 608 certification is required for refrigerant handling.
City of New Haven Department of Licenses and Inspections — Business License
New Haven requires a Certificate of Zoning Compliance and business-specific licenses for regulated industries. The Department of Licenses and Inspections issues permits for businesses operating within city limits. This license must be renewed annually and displayed at your place of business.
New Haven County / New Haven Mechanical Permit (per project)
A mechanical permit must be obtained from the local building department for each HVAC installation, replacement, or major repair. A final inspection is required upon completion.
Connecticut State Requirements
2 requirementsConnecticut 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. Certain services are also taxable in Connecticut, which has a broader sales tax base than many states. Register with the Connecticut Department of Revenue Services.
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).
Federal Requirements
1 requirementEIN (Employer Identification Number)
Required if you have employees or operate as an LLC or corporation. Free from the IRS.
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