Moving to Arizona as a residential contractor: every state's rule

Arizona licenses residential contractors statewide through the Registrar of Contractors (AZ ROC), and there is no city or county residential builder license layered on top of it. The homes-only credential is the B General Residential Contractor classification, which allows the licensee to construct and repair all or any part of a residential structure or appurtenance; electrical, plumbing, air conditioning, boiler, swimming pool, spa and water well work must be subcontracted to an appropriately licensed contractor. B-3 General Remodeling and Repair Contractor is the narrower version for remodeling and repairing an existing residential structure. The Registrar uses classification prefixes to separate markets: plain B codes are residential general building, B-1 and B-2 are commercial general building, C- and R- are commercial and residential specialty trades, CR- is specialty dual, and K codes are general dual. A contractor who wants both residential and commercial building work takes a dual classification instead of two licenses: KB-1 Dual Building Contractor covers the B-1 and B scopes together, and KB-2 Dual Residential and Small Commercial covers the B-2 and B scopes together. The license is held by a business, not by a person: it may be issued to a sole proprietorship, partnership, limited liability company or corporation, and the Registrar states that "the license belongs to the business and not to the qualifying party." The reader of this page is the qualifying party, the regularly employed person who supplies the experience and passes the exams on the business's behalf, and who must hold four years of practical or management trade experience in this type of construction.