HVAC Contractor Permit Requirements in Las Cruces, NM

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. New Mexico Taxation and Revenue — Gross Receipts Tax Registration

   New Mexico levies a GROSS RECEIPTS TAX (GRT) rather than a conventional sales tax, and it applies to goods AND most services performed in New Mexico. Register (free) with the New Mexico Taxation and Revenue Department for a Business Tax Identification Number. The state GRT rate is 4.875% (since July 1, 2023); combined state + local rates range from about 5.125% to just over 9% depending on your location code — use the department's official rate map.

   Official government source

   Free (no registration fee)·Immediate (online via Taxpayer Access Point)

   Free (no registration fee)

   Immediate (online via Taxpayer Access Point)

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

   $20–$100 (exam)

   1–2 days

1. New Mexico Regulation and Licensing — HVAC Contractor License

   Mechanical (HVAC) contracting businesses in New Mexico must hold a contractor license from the RLD Construction Industries Division (CID). The company must have a certified qualifying party who documented trade experience and passed the classification exam plus the Contractor's Business and Law exam; individual tradespeople are certified as journeymen — New Mexico issues no 'Master' licenses. A license bond and tax registration certificate are also required. EPA Section 608 certification is required federally for refrigerant handling.

   Official government source

   $36 qualifying-party application (paid to PSI) plus exam, classification license, and license-bond costs — confirm current totals with CID·4–8 weeks

   $36 qualifying-party application (paid to PSI) plus exam, classification license, and license-bond costs — confirm current totals with CID

   4–8 weeks

2. City of Las Cruces — Business Registration

   Las Cruces requires an annual business registration for any business with a physical location in city limits, including home-based businesses. Apply through the city's online Citizen Portal; an NM CRS/Business Tax ID number is required first. The registration must be renewed annually.

   Official government source

   $35/year ($20/year for nonprofits)·1–3 weeks

   $35/year ($20/year for nonprofits)

   1–3 weeks

3. Doña Ana County / Las Cruces 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

   $150 flat (residential) or $300 flat (commercial) per permit, plus $10 technology fee·1–5 business days

   $150 flat (residential) or $300 flat (commercial) per permit, plus $10 technology fee

   1–5 business days

Official Sources

• New Mexico Regulation and Licensing — HVAC Contractor License
• City of Las Cruces Development Services

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