A KB-2 contractor license is a dual classification issued by the Arizona Registrar of Contractors (ROC) that allows a single contractor to legally perform both general residential construction and small commercial construction, on projects up to $2,000,000 including labor and materials. In plain terms: a KB-2 licensed contractor, like Four Peaks Roofing (ROC 340403 KB2), can work on your home and on a commercial building like a church, office, or retail property, without needing two separate licenses or subcontracting the work out.
How Arizona’s Contractor License Classifications Work
The Arizona ROC breaks contractor licenses into dozens of specific classifications, but for general building and roofing work, the ones homeowners and business owners run into most are:
| Classification | What It Covers | Project Limit |
|---|---|---|
| B – General Residential | Residential construction only | No stated project cap |
| B-2 – General Small Commercial | Commercial construction only | $2,000,000 or less |
| KB-1 – Dual License | Residential + unlimited commercial | No cap on commercial side |
| KB-2 – Dual License | Residential + small commercial | $2,000,000 or less (commercial) |
According to the Arizona Registrar of Contractors, “KB-2 Dual Residential and Small Commercial allows the scope of work permitted by the B-2 General Small Commercial and the B- General Residential Contractor licenses.” All of these classifications still require licensed subcontractors for specialty trades like electrical, plumbing, HVAC, and pools.
Why a KB-2 License Matters When You’re Hiring a Roofer
It Proves the Contractor Is Vetted by the State
To hold any ROC license, a contractor has to pass a trade exam, carry the required bonding, and maintain liability insurance. A KB-2 specifically means the state has verified the contractor’s qualifications for both residential and commercial-scale work, which is a higher bar than a residential-only license alone.
It Means One Contractor Can Handle Mixed-Use or Multi-Building Projects
If you own a property that blurs the line between residential and commercial, like a large HOA clubhouse, a small multi-family property, or a church with an attached rectory, a KB-2 contractor can legally take on the entire roofing scope without you needing to hire separate residential and commercial crews.
It Signals Financial and Operational Capacity
The $2,000,000 commercial project cap under KB-2 (versus unlimited under KB-1) still covers the overwhelming majority of commercial roofing jobs, tenant improvements, and multi-building HOA re-roofing projects, meaning a KB-2 contractor is bonded and equipped to handle serious project sizes, not just small patch jobs.
How to Verify a Contractor’s License in Arizona
Before hiring any roofing contractor, you can (and should) verify their license directly through the state. The Arizona ROC website lets you search any license number to confirm it’s active, see its classification, and check for any complaints or disciplinary history. Four Peaks Roofing’s license number is ROC 340403 KB2, and we’re always happy to have homeowners verify it themselves.
Red Flags of an Unlicensed or Misclassified Contractor
- They can’t provide a ROC license number, or the number doesn’t come up in the state lookup tool
- They ask for full payment upfront before any work begins
- They pressure you to sign a contract same-day, especially after a storm
- They can’t show proof of bonding or general liability insurance
- Their license classification doesn’t match the scope of work (for example, a residential-only “B” license contractor offering to reroof a commercial building)
Frequently Asked Questions
What does KB-2 mean on a contractor’s license?
KB-2 is a dual classification from the Arizona Registrar of Contractors that combines a General Residential (B) license with a General Small Commercial (B-2) license, allowing the contractor to legally perform both residential work and commercial projects up to $2,000,000.
What’s the difference between KB-1 and KB-2 licenses?
Both are dual residential/commercial licenses, but KB-1 has no dollar cap on commercial projects, while KB-2 caps commercial project size at $2,000,000 including labor and materials.
Is a KB-2 contractor allowed to work on my house?
Yes. The residential (B) portion of a KB-2 license authorizes general residential construction and repair work with no stated project size limit, so KB-2 contractors regularly handle home roofing projects.
How do I check if a roofing contractor’s license is real?
Search their license number on the Arizona Registrar of Contractors website. It will show the license status, classification, bond information, and any complaint history.
Does Four Peaks Roofing hold a KB-2 license?
Yes. Four Peaks Roofing holds Arizona ROC license 340403 KB2, meaning we’re licensed, bonded, and insured to handle both residential roofing and small commercial roofing projects across the Phoenix area.
Work With a Verified, Fully Licensed Roofer
Whether it’s your home or your business, hiring a properly licensed contractor is the single best protection you have against shoddy work, bonding disputes, and insurance headaches down the road. Four Peaks Roofing is licensed, bonded, and insured under ROC 340403 KB2, with over 30 years of experience across residential and commercial roofing in Phoenix. Contact us for a free estimate.
