Plumbing Contractor License in Arizona: Requirements, Qualifier, Bond and Exams

Yes — statewide.

What Arizona licenses is the contracting business: the ROC's plumbing classifications (C-37, R-37, R-37R, CR-37) are issued to a business and carried by its qualifying party.

Our research found no state journeyman or master plumber license for individuals — that absence is inferred from the licensing law's structure rather than confirmed, and whether any city adds its own rules was not checked — and the statute expressly exempts people who do the regulated work as employees with wages as their sole compensation, so your crew does not need ROC licenses of its own.

The state's small-job exemption is narrow: casual or minor work under $1,000 in aggregate contract price that requires no local building permit.

The Arizona Registrar of Contractors (ROC) issues contractor licenses and classifies the work they cover.

For plumbing the classifications are C-37 Plumbing (commercial), R-37 Plumbing Including Solar and R-37R Plumbing (residential) and CR-37 Plumbing (dual); C-77 and CR-77 are the plumbing-including-solar classes, and C-78 covers solar plumbing liquid systems only.

Scope decides what your crews can be sent to do: C-37 covers all plumbing performed solely within property lines — not on public easements or rights-of-way — including water supply piping, venting and drainage, septic tanks and leach lines, and lawn sprinklers.

Pick the class that matches the work you sell: the qualifier must be actively engaged in that classification of work.

Arizona calls this person the qualifying party, and the license rests on them.

They must be regularly employed by the licensee and actively engaged in the classification of work — as the sole proprietor, a partner, an LLC member, a corporate officer or an employee of the contracting business.

On experience, the statute asks for a minimum of four years of practical or management trade experience, at least two of them within the last ten years and dealing specifically with the type of construction the license covers; accredited technical training can count for up to two of the four.

One qualifier also cannot float across a group of companies: they may act for only one additional licensee, and only where the two share at least 25% common ownership or one is a 25%-owned subsidiary of the other.

Two, both passed at a minimum of 70%: the online, open-book Arizona Statutes and Rules Training Course and Exam (SRE), taken through Gmetrix, and a trade exam administered by PSI, online or at a test center — unless the trade exam is waived.

The statute describes the qualifying party's written exam as covering the trade and Arizona building, safety, health and lien laws and contracting business administration, taken within two years before application; the ROC's application page names the SRE and the PSI trade exam as the exams required today.

The statute's waiver ground is having been the qualifying party for a licensee in the same classification within the preceding five years, and the ROC's application page gives the trade exam as the waivable one — anything beyond that is a question for the ROC.

Fees: $61 for the Statutes and Rules exam, paid to Gmetrix, and $66 for a trade exam, paid to PSI.

Bonds scale with the license family and, for commercial specialty contractors, with volume.

A commercial specialty contractor furnishes a surety bond or cash deposit based on estimated annual construction volume: $2,500 under $150,000, rising in bands to $37,500-$50,000 at $10 million or more.

Specialty residential contractors — R-37 and R-37R are the residential plumbing classes — furnish $1,000 to $7,500.

Residential and dual licensees also owe the Residential Contractors' Recovery Fund: either pay the assessment, capped at $600 per two-year license period, or post an extra $200,000 bond.

On insurance, the license application attests to compliance with Arizona's workers' compensation statutes and rules, including the policy number where coverage is required.

ROC licenses run on two-year terms.

The ROC's fee table (as of September 2026) prices a new license at $580 for specialty commercial (C: $100 application + $480 license), $720 for specialty residential (R: $80 + $270 + $370 Recovery Fund) and $850 for specialty dual (CR: $100 + $380 + $370).

Renewals are $480 (C), $540 (R) and $650 (CR, including the Recovery Fund).

The statute caps what the ROC may charge: $350 specialty residential, $1,000 specialty commercial and $1,350 specialty dual for an original license, with renewal caps of $270 (residential), $900 (commercial) and $1,170 (dual), plus the Recovery Fund assessment of up to $600 per biennial license period.

Our research did not confirm a continuing-education requirement for renewal — the ROC's classification-requirements document was not retrievable when we read the site — so ask the ROC before you budget for CE.

Arizona's statute book has a universal licensing law: it requires the state to license people who establish residence in Arizona and have held a license in good standing in another state for at least one year, at the same practice level, having passed any exam that state required.

Our research did not confirm how that law applies to the ROC's contractor classifications — the statute's exceptions decide — so put your situation to the ROC before you count an out-of-state license toward anything.

NASCLA exam scores do not carry over to plumbing either: the ROC accepts them only for the B-1/KB-1 and B-2/KB-2 general building classes and the CR-11/C-11/R-11 electrical classes.

The license rests on a person who must be regularly employed by the licensee and actively engaged in the classification, so a departure leaves the business without the person who carried it.

Plan around three rules.

First, the statute has the registrar waive the examination requirement for a qualifying party who is currently, or has previously been, a qualifying party for a licensee in the same classification within the preceding five years — the route by which a former qualifier, or a hire who recently qualified one, can step back in.

Second, whoever you bring in faces the one-additional-licensee limit: a qualifier can cover a second company only with at least 25% common ownership between the two.

Third, the deadline for replacing a qualifying party was not established in our research — the ROC's classification-requirements document could not be retrieved — so confirm the current rule with the ROC and recruit before your qualifier gives notice.

Our research found one, and it is narrow.

The contractor licensing law exempts work of a casual or minor nature with an aggregate contract price under $1,000 — but the exemption does not apply in any case where the performance of the work requires a local building permit, which our saved statute text shows as the first item in the exemption's 'does not apply' list before ending.

Those are the limits our research captured, not the statute's complete list, so check A.R.S. §32-1121, or ask the ROC, before you treat a small job as exempt.