HVAC Contractor Permit Requirements in Nashville, TN

1. EPA Section 608 Technician Certification

   Federal law requires all HVAC technicians who purchase or handle refrigerants to be certified under EPA Section 608 of the Clean Air Act. Certification is available in Type I (small appliances), Type II (high-pressure), Type III (low-pressure), and Universal categories. Certification is obtained through an EPA-approved testing organization such as ESCO Institute or NATE.

   Official government source

   $20–$60 (exam fee)·1–2 weeks (exam scheduling)

   $20–$60 (exam fee)

   1–2 weeks (exam scheduling)

2. 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. Tennessee Board for Licensing Contractors - Contractor License (Mechanical/HVAC)

   Tennessee requires a Contractor license from the Tennessee Board for Licensing Contractors - the correct name is 'Board for Licensing Contractors' - for HVAC projects of $25,000 or more, taken in the mechanical classification. For residential remodeling projects of $3,000 to $24,999, a Home Improvement Contractor license applies instead, but only in Bradley, Davidson, Hamilton, Haywood, Knox, Marion, Robertson, Rutherford, and Shelby counties. Applicants file a financial statement, name a qualifying agent who passes the Business and Law exam plus the trade exam, and carry general liability insurance and workers' compensation.

   Official government source

   $250 for the initial application, reinstatement, or change of ownership; $200 to renew; $100 to change mode of operation; $25 for a duplicate license. Trade and Business and Law exam fees are set by the Board's testing vendor - Prov as of July 1, 2026 - not by the Board, and a $50 charge applies to pre-approval requests for certain plumbing and mechanical exams. All Board fees are non-refundable.·Contractor licenses renew on a two-year cycle. Renewal opens within 90 days of the expiration date and the Board asks for submission at least 30 days before it; late renewal costs $20 per month for up to 12 months. The Board publishes no initial processing time - timing depends on exam scheduling, and Prov took over exam administration from PSI on July 1, 2026, with PSI honoring already-scheduled appointments through September.

   $250 for the initial application, reinstatement, or change of ownership; $200 to renew; $100 to change mode of operation; $25 for a duplicate license. Trade and Business and Law exam fees are set by the Board's testing vendor - Prov as of July 1, 2026 - not by the Board, and a $50 charge applies to pre-approval requests for certain plumbing and mechanical exams. All Board fees are non-refundable.

   Contractor licenses renew on a two-year cycle. Renewal opens within 90 days of the expiration date and the Board asks for submission at least 30 days before it; late renewal costs $20 per month for up to 12 months. The Board publishes no initial processing time - timing depends on exam scheduling, and Prov took over exam administration from PSI on July 1, 2026, with PSI honoring already-scheduled appointments through September.

1. Metro Nashville — Gas/Mechanical Trade Permit

   HVAC installation in Nashville requires a gas/mechanical trade permit from the Department of Codes and Building Safety. Metro's rule is about who may apply, not about a separate local registration: only licensed contractors holding an e-permit account can apply online through ePermits, and anyone who is not a licensed contractor or has no e-permit account must apply in person at the Codes department at 800 President Ronald Reagan Way. Metro's Mechanical, Plumbing and Electrical Examiners and Appeals Board oversees the trade licensing side, and existing licences are renewed online through Codes' License Renewal system. The permit covers installation of gas and mechanical systems, appliances and fixtures, and repairs and alterations to existing systems, and inspections follow.

   Official government source

   Set by Metro's published Codes Fee Schedule (16.16.400): minimum fee $75.00 per permit, plus $11.00 for each residential gas or mechanical appliance beyond the first and $16.00 for each commercial one, $11.00 per gas meter connection, $21.00 per hot water heater and $50.00 for underground fuel piping. Re-inspection is $50.00.·A licensed contractor with an e-permit account pulls the permit through ePermits without a review queue; in-person applications are handled at the counter, Monday-Friday 7:30 a.m.-4:00 p.m. Inspections are requested afterwards. Codes: 615-862-6500.

   Set by Metro's published Codes Fee Schedule (16.16.400): minimum fee $75.00 per permit, plus $11.00 for each residential gas or mechanical appliance beyond the first and $16.00 for each commercial one, $11.00 per gas meter connection, $21.00 per hot water heater and $50.00 for underground fuel piping. Re-inspection is $50.00.

   A licensed contractor with an e-permit account pulls the permit through ePermits without a review queue; in-person applications are handled at the counter, Monday-Friday 7:30 a.m.-4:00 p.m. Inspections are requested afterwards. Codes: 615-862-6500.

Official Sources

• Metro Nashville Codes Administration
• Tennessee Board of Licensing Contractors

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