Ask what license an Arizona pool builder needs and the honest answer is a question back: for whom, and does the job include solar?
Those two questions are independent of each other, and Arizona has built a classification for every combination. The result is six pool classifications rather than one, arranged in a grid rather than a ladder.
The grid, not the ladder
The Arizona Registrar of Contractors sets out the organizing principle before it lists anything: the board “issues separate licenses for commercial and residential work, and dual licenses that cover both commercial and residential, for each particular trade or field of a construction science profession.”
Applied to pools, that produces:
| Standard | Including solar | |
|---|---|---|
| Commercial | A-9 Swimming Pools | A-19 Swimming Pools, Including Solar |
| Residential | B-5 General Swimming Pool Contractor | B-6 General Swimming Pool Contractor, Including Solar |
| Dual | KA-5 Dual Swimming Pool Contractor | KA-6 Dual Swimming Pool Contractor, Including Solar |
The word to notice is separate. Commercial and residential are not tiers of a single credential where the bigger one contains the smaller. They are different licenses, and the dual classification exists precisely because holding one does not give you the other.
Where each sits in the board’s own structure is worth knowing too. A-9 and A-19 are listed under Engineering Contracting (Commercial). B-5 and B-6 sit under Residential Contracting. KA-5 and KA-6 appear under General Dual Engineering Contracting. Arizona files commercial pool construction as engineering work.
What A-9 actually authorizes
The commercial classification is the most enumerated of the six:
A-9 Swimming Pools. This classification allows the licensee to construct, service, and repair swimming pools and spas, including water and gas service lines from point of service to pool equipment, wiring from pool equipment to 1st readily accessible disconnect, pool piping, fittings, backflow prevention devices, waste lines, and other integral parts of a swimming pool or spa.
Three things fall out of that sentence for an operator.
The utility runs are inside the license. Water and gas service lines from the point of service to the pool equipment are named. So is the wiring — but only as far as the first readily accessible disconnect. That is a defined stopping point rather than a judgment call, and it is the kind of boundary an inspector can point at.
Backflow prevention and waste lines are named explicitly. Neither is left to be argued about as incidental.
Service and repair sit alongside construction. A builder does not need a second credential to maintain what it built, and a service-only company can hold the same classification.
The board then adds a second sentence with a condition attached: “Also included is the installation of swimming pool accessories, covers, safety devices, and fencing for protective purposes, if in the original contract.” Fencing and safety devices are inside the classification when they are part of the contract you signed — not when they arrive later as a separate job.
If that scope language reads familiar, it is because South Carolina’s Swimming Pools subclassification reaches nearly the same list in nearly the same order. Two regulators arriving at almost identical wording is a reminder that this trade’s boundary questions are the same everywhere even when the license structures are not.
B-5 is narrower, and says what it leaves out
The residential classification is not a smaller A-9. It is written differently:
B-5 General Swimming Pool Contractor. This classification allows the licensee to construct and repair of swimming pools and spas. Installation of code-required pool barriers around the swimming pool or spa and installation of utilities from the point of service to the pool equipment. Construction of other structures or appurtenances is excluded.
Compare the two and the differences are deliberate. B-5 says “construct and repair” where A-9 says “construct, service, and repair.” B-5 refers to “utilities from the point of service to the pool equipment” as a single phrase where A-9 itemizes the water lines, gas lines, wiring, piping, fittings, backflow devices and waste lines. And B-5 closes with an exclusion A-9 does not carry at all: construction of other structures or appurtenances is excluded.
For a residential builder that last line is the one to plan around. The pool, its barriers and its utility runs are yours. The ramada, the outdoor kitchen, the retaining wall holding up the deck — those are other structures, and B-5 does not reach them.
The board also notes that the B-5 scope “includes all B-5R subclassifications,” so there is further structure beneath the residential class that an applicant should ask the board about directly. We are not enumerating those here; we did not retrieve the B-5R list.
The solar classifications are defined by reference
A-19, B-6 and KA-6 are not independent scopes. Each is written as its parent plus one thing.
The board describes A-19 as allowing the licensee “to perform the same scope of work permitted by the A-9 but also includes installation and repair of solar heating devices.” B-6 is described in identical terms against the B-5, including all B-5R subclassifications.
That construction has a practical consequence. Solar pool heating is not a separate trade you subcontract by default; it is an upgrade to your own classification. A company that adds solar heating to its offering is not adding a second license so much as moving one step across the grid.
The dual licenses
KA-5 covers “the scope of work permitted by the commercial A-9 Swimming Pools and the residential B-5 General Swimming Pool licenses.” KA-6 does the same for the commercial A-19 and the residential B-6.
A pool company that builds backyard pools and also takes hotel, HOA amenity or municipal work is the intended holder. Without a dual license, that company is looking at two separate credentials to cover the same calendar year of work.
A seventh class sits next door
Immediately after B-6 the board lists B-10 Pre-Manufactured Spas and Hot Tubs, allowing the licensee “to construct and repair of spas and hot tubs,” with installation of code-required barriers around the spa or hot tub and installation of utilities from the point of service to the spa equipment included.
It is a residential classification in its own right, not a subset of the pool classes. A company whose business is dropping in pre-manufactured spas is looking at a different credential from a company that builds pools — even though both classifications mention spas.
Where residential ends
Because commercial and residential are separate licenses, the definition of the line between them does real work. The board supplies it:
Residential contracting is defined as constructing, altering, repairing, adding to, subtracting from, improving, moving, wrecking or demolishing any residential structure, such as houses, townhouses, condominiums or cooperative units and any appurtenances on or within residential property lines.
And then, in five words: “Commercial contracting is anything other than residential.”
That is a residual definition rather than a positive one, which means the question is never “is this commercial?” It is always “is this residential?” — and if the answer is no, the commercial license is the one you needed. An apartment complex amenity pool, a condominium association’s shared pool outside the individual property lines, a community center: none of those is obviously a “residential structure” in the sense the definition describes, and the classification consequence follows from that reading rather than from the size of the job.
When a license is required at all
The board states the rule as a threshold with an override: “Generally, if labor and materials exceed $1,000 OR a permit is required (regardless of the price of labor and materials), then a license is required.” It directs readers to Arizona Revised Statutes section 32-1121, on persons not required to be licensed, for the detail.
For pool construction the second limb is the one that bites. Pool work generally requires a permit, so the dollar figure rarely decides anything for a builder. It matters more for small service and repair work, and even there the permit question is worth asking before assuming the exemption applies.
We are not reproducing section 32-1121’s exemption list here. It is a statute with a substantial set of carve-outs and it deserves to be read rather than summarized.
The license belongs to the business
One structural feature that catches operators moving in from other states: “A license may be issued to a sole proprietorship (individual), a partnership, limited liability company or a corporation. The license belongs to the business and not to the qualifying party.”
That is the opposite arrangement from states where the credential attaches to a named individual who carries it between employers. In Arizona the entity holds the license and the qualifying party qualifies it. When a qualifying party departs, the question is what happens to the business’s license — not what the individual takes with them.
The board also addresses what happens on a change of ownership, which is worth confirming directly with the ROC before any transaction rather than assumed from a general rule.
The bond, without the number
Arizona requires a bond in connection with contractor licensing, and the amount is not something we are going to publish. It varies by classification and by the volume of work a licensee does, so a figure lifted from an article is the wrong input to a budget — and a wrong figure here means an application that comes back.
What is worth being clear about is the instrument. A contractor’s bond is not coverage for your business. It answers to the state and to the people your work affects, and when it pays, the surety looks to you for reimbursement. It does not defend you and it does not finish your job.
Surety is handled by our sister brand, Wexford Bonds, the Wexford Insurance surety operation, which writes contractor license and permit, bid, and performance and payment bonds.
The grid shows up in the claim file
Holding A-9 rather than B-5, or B-5 rather than KA-5, is a statement about the kind of work you do. That statement is also, quietly, an underwriting statement.
A residential builder that takes an HOA amenity pool has crossed the board’s residential/commercial line and may also have crossed the line its policy was rated against. A B-5 holder who builds the ramada alongside the pool has performed work the classification excludes. Neither of those is discovered on the day it happens. Both are discovered when something goes wrong and someone reads the license, the contract and the policy side by side.
If you want your classification, your actual job mix and your coverage read against each other, our Arizona pool contractor insurance page sets out how we place it here, or start a quote and we will work through the commercial and residential split with you.
Confirm before you file
Every quotation above comes from the Registrar of Contractors’ own classification listing, and the link goes to it. Licensing requirements change, and the board’s page carries its own caution that its website content is provided as a courtesy and may not reflect recent changes. Confirm the current position with the Arizona Registrar of Contractors before you file — the bond amounts, the fees, the experience and examination requirements, and the B-5R subclassification list, none of which we have asserted here. Requirements vary considerably from state to state; if you work across state lines, start from our state pages rather than assuming Arizona’s structure travels.