HVAC Contractor Permit Requirements in San Diego, CA

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. California Contractors State License Board — C-20 HVAC Contractor License

   California requires HVAC contractors to hold a C-20 (Warm-Air Heating, Ventilating and Air-Conditioning) license from the California Contractors State License Board (CSLB). Applicants must have 4 years of journeyman experience, pass a state exam, and provide proof of $25,000 bond (SB 607, effective Jan 1, 2023) and workers' compensation insurance.

   Official government source

   $450 application fee + $200 initial license (sole owner; $350 non-sole owner) — CSLB fee schedule·8–14 weeks

   $450 application fee + $200 initial license (sole owner; $350 non-sole owner) — CSLB fee schedule

   8–14 weeks

1. City of San Diego — Mechanical Permit

   San Diego requires a mechanical permit for HVAC installation from the Development Services Department. Contractors must hold a valid California C-20 license and a San Diego business tax certificate.

   Official government source

   $100–$600 per project·2–6 weeks

   $100–$600 per project

   2–6 weeks

Official Sources

• San Diego Development Services — Permits
• California CSLB — C-20 HVAC License

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