HVAC Contractor Permit Requirements in Hattiesburg, MS

Complete permit and license guide for starting a hvac contractor in Hattiesburg, Forrest County, Mississippi.

Updated 2026-03-15 6 stops $400–$1,500 est. 4–10 weeks
Get my personalized route — $14.99

Not legal advice. Requirements may change — always verify with your local government authority before applying. This guide was compiled from public and official sources (last updated ) and has not yet been independently source-verified — confirm each requirement before acting on it.

Federal — start here

1 stop

  1. EIN (Employer Identification Number)

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

    Official government source

    FreeImmediate (online application)

State of Mississippi

2 stops

  1. Mississippi Department of Revenue — Sales Tax Permit

    Required for all businesses selling tangible personal property or taxable services in Mississippi. Mississippi charges a 7% state sales tax (one of the highest in the nation). Register with the Mississippi Department of Revenue.

    Official government source

    FreeImmediate (online via TAP)

  2. EPA Section 608 Certification (for refrigerants)

    Technicians who purchase, recover, or handle refrigerants must hold EPA Section 608 certification. Required by federal law regardless of state.

    Official government source

    $20–$100 (exam)1–2 days

City of Hattiesburg / Forrest County

3 stops

  1. Mississippi State Board of Contractors — HVAC Contractor License

    HVAC contractors in Mississippi must hold a specialty contractor license from the Mississippi State Board of Contractors. EPA Section 608 certification is required for refrigerant handling.

    Official government source

    $150–$300 (initial)4–8 weeks

  2. City of Hattiesburg Revenue Division — Business License

    Hattiesburg requires a Business License for all businesses operating within city limits. Fees vary by business type. This license must be renewed annually and displayed at your place of business.

    Official government source

    $50–$500/year depending on business type and gross revenues1–3 weeks

  3. Forrest County / Hattiesburg Mechanical Permit (per project)

    A mechanical permit must be obtained from the local building department for each HVAC installation or major repair. Inspections are required upon completion.

    Official government source

    $50–$300 per project1–5 business days

Terminus

Open for business — est. $400–$1,500 · 4–10 weeks

Want this mapped to your exact business and structure, in filing order?

Get my personalized route — $14.99

Official Sources

Related Guides