How to Get a Heating and Air Conditioning License in New Mexico

To get a heating and air conditioning license in New Mexico, first identify whether you need an individual journeyman certificate, a business contractor license, or both. A business that contracts for HVAC work applies through the Construction Industries Division (CID) of the Regulation and Licensing Department. The usual classification for HVAC air-handling, refrigeration equipment, and ductwork is MM-3 (Heating, Ventilation & Air Conditioning). The business must be qualified by a CID-certified qualifying party, and the exact path depends on the work scope and business structure. CID contractor licensing and federal refrigerant certification are separate requirements.

Here's how it breaks down.

Start With the Correct New Mexico Classification

New Mexico does not issue a single credential labeled "HVAC license." CID groups construction work into numbered classifications. For standard heating and air conditioning work, MM-3 covers installing, altering, repairing, servicing, and maintaining HVAC air-handling and refrigeration equipment and piping, including fans, coils, condensing units, packaged heating or air-conditioning units, evaporative cooling units, ductwork, and related accessories.

Other work may point to a different or additional classification. MM-2 covers natural-gas fitting and includes warm-air heating systems and listed gas appliances. MM-4 covers hydronic heating and cooling, process piping, boilers, and related equipment. MM-98 indicates licensure in MM-1 through MM-4. Refrigeration work is expressly included in MM-3, but the complete project scope determines whether another classification is needed.

Do not assume a general building license covers a mechanical project. CID rules limit a license to the scope authorized by its classification; work outside that scope can be a violation. Check the current CID classification-and-scope rule or ask the Mechanical Plumbing Bureau before bidding on work that crosses HVAC, gas, plumbing, or boiler boundaries.

The Qualifying Party Requirement

CID issues contractor licenses only to qualified business entities that employ or are owned by one or more CID-certified qualifying parties (QPs) for the classification involved. The QP is the individual whose experience and examination credentials qualify the business for that scope. A sole proprietorship also must be legally authorized to do business; do not assume that its owner is qualified without completing the QP requirements.

For MM-3, the classification rule requires four years of experience. The general QP rule requires satisfactory proof of four years within the 10 years immediately before the application to become eligible for the qualifying examination. Certain approved technical training may receive limited experience credit under the rule.

The QP applicant must submit the current work-experience documentation to CID or its licensing designee. CID's instructions say that each person attesting to the applicant's experience uses a separate work-experience affidavit and that the attesting signature must be notarized.

If a licensee loses its QP through termination or another separation, the licensee and QP must notify CID in writing within 30 days. If the license ceases to be qualified by a QP, the rule says it is automatically canceled: the business may not bid or start new work in that classification, although work already in progress may continue for no more than 120 days under the rule. Contact CID or PSI promptly rather than assuming a replacement automatically restores the license.

Step-by-Step Application Sequence

1. Define the work and the credential path. Decide whether you will contract through a business, work as an individual under a licensed contractor, or do both. Individuals performing mechanical or plumbing work generally need the appropriate journeyman certificate; an apprentice may work under the direct supervision of a properly certified journeyman. Ask CID about your specific role before taking independent work.

2. Document the QP's experience. For MM-3, plan to document four years of relevant experience within the 10 years before applying. Submit the current QP application and work-experience affidavits through the process directed by CID and PSI. If you have approved technical training, ask how it may be credited; do not assume a self-created hour log is enough.

3. Obtain preapproval and complete the required exam path. QP applicants must be preapproved before scheduling. Pass the exam or exams for the classification and the Contractor's Business and Law exam, or complete an approved Business and Law course in lieu of that exam. PSI administers the exams. The current RLD page lists testing centers in Albuquerque, Santa Fe, Las Cruces, Roswell, and Farmington, with additional out-of-state locations; use the current PSI bulletin for fees, identification, allowed references, locations, and retake rules.

4. Authorize the business entity. Corporations, LLCs, LPs, and LLPs must be legally authorized to do business in New Mexico and must obtain their own CID license. Gather the New Mexico Taxation and Revenue registration certificate and the entity certificates applicable to your structure. CID authorizes only the entity name shown on the license.

5. Secure the required financial responsibility. New Mexico's contractor-license rule requires a $10,000 bond underwritten by a corporate surety authorized to transact business in New Mexico, covering the applicable licensure period. RLD also states that workers' compensation coverage is required for all licensed entities. Commercial insurance, local registration, or contract requirements may apply separately, so confirm those with the relevant authority or adviser.

6. Submit the CID license application through PSI. After the QP has completed the required exam path and the business is ready, submit the company application to PSI, which currently handles CID licensing paperwork. As of 2026, RLD lists a $36 application fee plus applicable license fees, the license bond, tax and entity records as applicable, and the QP certificate or qualifying exam scores with the Business and Law exam score or course certificate. Verify the current fee schedule before paying. An incomplete application can be rejected, and the rules require licensing requirements to be completed within six months after the application is received.

7. Check project permits and local requirements. CID contractor licensing is separate from project permitting and inspections. The authority having jurisdiction may be the state, a municipality, or a county. For example, Albuquerque lists heating or cooling and the installation of equipment or ductwork as plumbing/mechanical permit work, and says required permits must be obtained before work begins. Check the local building department and any local business-license rules before your first job.

EPA Section 608 Is a Separate Federal Requirement

Separate from the New Mexico contractor classification, the federal EPA requires Section 608 certification for technicians who maintain, service, repair, or dispose of equipment that could release refrigerants. EPA also says that installation work such as adding or removing refrigerant or connecting or disconnecting hoses or pre-charged lines requires certification.

There are four certification types: Type I for small appliances, Type II for high- or very-high-pressure appliances, Type III for low-pressure appliances, and Universal for all types. The credentials do not expire, but the test must be administered by an EPA-approved certifying organization.

EPA Section 608 certification does not replace a New Mexico CID contractor license, and a CID contractor license does not replace the federal certification when the work requires it. Confirm the applicable certification type and current testing provider before handling refrigerant work.

What Catches People in New Mexico Specifically

The qualifying-party dependency. The business license must remain qualified by a CID-certified QP for the licensed scope. A separation requires written notice to CID within 30 days, and a license that ceases to be qualified by a QP is automatically canceled under the rule. Keep the QP relationship and renewal status current.

Experience documentation matters. The current CID/PSI process requires proof of the qualifying experience before the QP can schedule the qualifying examination. Follow the current affidavit and notarization instructions, and ask CID or PSI what it will accept if an attesting employer is unavailable.

Scope boundaries between classifications. MM-3 includes HVAC equipment, refrigeration equipment, ductwork, and controls/control wiring not exceeding 24 volts. MM-2 addresses natural-gas fitting and warm-air gas systems, while MM-4 addresses hydronic and process piping. Incidental structural or electrical work associated with MM-3 must be performed by a properly licensed contractor. Work outside the authorized classification can be a violation and grounds for disciplinary action.

Local permits still apply. A CID contractor license does not remove the need to check permits and inspections for each project. The applicable state, city, or county authority determines the local process, and permit fees and inspection requirements vary by jurisdiction.

Moving Forward

The New Mexico heating and air conditioning licensing path is a sequence: choose the correct classification, establish the QP and experience record, complete the required exam path, authorize the business, maintain the $10,000 bond and workers' compensation coverage, submit through PSI, and check project permits and EPA Section 608 requirements. Rules, fees, exam details, and local requirements can change, so verify the current instructions before applying or bidding.

For a structured walkthrough of the application sequence, requirements, and trackers — from experience documentation through your first permitted job — the New Mexico HVAC License Guide maps the CID process in one place.

See more New Mexico guides →