A.R.S. 32-1101: How Arizona Classifies Contractor Licenses

Section 32-1101 defines the terms used across Arizona's contractor licensing law. Three of those definitions set the license classes.

A residential contractor is one who does construction work within residential property lines. The statute opens the definition this way:

"Residential contractor" is synonymous with the term "residential builder" and means any person... that for compensation undertakes to... within residential property lines...

A commercial contractor is the mirror image. The statute defines it as one who does construction work except within residential property lines. In plain terms, that is everything that is not a home: offices, stores, restaurants, and other commercial buildings. A dual licensed contractor holds a single license that covers both commercial and residential property. The statute also defines contractor broadly. It sweeps in subcontractors, specialty contractors, and others who manage or supervise a construction project.

Plumbing is a specialty trade. Under Arizona's system, a plumbing contractor is licensed inside one of these buckets. A plumber who works on homes holds a residential plumbing classification. A plumber who works on commercial buildings holds a commercial classification. A dual license covers both. The statute in 32-1101 sets the buckets. The specific classification codes, the letters and numbers printed on a license, are assigned by the Arizona Registrar of Contractors (ROC) under its own rules. They are not spelled out word for word in this statute. The ROC rules page returned an access error when checked, so confirm the current classification list directly with the ROC.

The class is not a formality. A contractor may legally perform only the work their classification covers. A plumber holding only a residential class is not licensed to plumb a new restaurant. One holding only a commercial class is not the right license for a house re-pipe. Hiring a contractor whose class does not match your project can void permits and leave you exposed if the work goes wrong. This is separate from whether the license is simply active. For the difference between a licensed contractor and an unlicensed handyman, see licensed contractor vs handyman in Arizona. To look up a specific license and read its class, see how to verify a plumber's ROC license.

Before you hire, match the contractor's class to your job. A homeowner needs a residential or dual class for house work. A business needs a commercial or dual class. The exemptions that let a homeowner skip a license entirely are a different statute; see A.R.S. 32-1121 owner-builder and handyman exemptions. The size of the bond a contractor must post also depends on this classification; see A.R.S. 32-1152 contractor license bonds. When a contractor's class does not clearly cover your project, treat that as a red flag and ask before any work starts.

A.R.S. 32-1101 is Arizona's official statute and a public-domain government work; the excerpt above is reproduced from the current published text. Read the complete definitions section on the Arizona Legislature's site: azleg.gov/ars/32/01101.htm. The specific license classifications are set by the Arizona Registrar of Contractors at roc.az.gov.

This page explains a general Arizona statute and is not legal advice. License classifications and their scope can change, so confirm the current classes with the Arizona Registrar of Contractors before relying on this for a real project.