Best Licensed Plumbers in Flagstaff, AZ
44 plumbing companies registered in Flagstaff hold current ROC licenses, verified against official records as of August 17, 2026. The 8 below are the top-ranked, ordered by years licensed.
- 44 active ROC plumbing licenses registered in Flagstaff
- License scopes in Flagstaff: 26 dual (residential and commercial), 18 residential-only; commercial-only licenses never appear here
- Median time licensed in Flagstaff: 14 years
- Longest Flagstaff licensure: since 1972
- 9 of Flagstaff's licenses (20.5%) have been held 25 or more years
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- Verified
- August 17, 2026
- Licensed since
- 1972
- Expires
- 2027-06-30
- Verified
- August 17, 2026
- Licensed since
- 1989
- Expires
- 2027-03-31
- Verified
- August 17, 2026
- Licensed since
- 1991
- Expires
- 2026-11-30
- Verified
- August 17, 2026
- Licensed since
- 1995
- Expires
- 2027-07-31
- Verified
- August 17, 2026
- Licensed since
- 1995
- Expires
- 2026-11-30
- Verified
- August 17, 2026
- Licensed since
- 1996
- Expires
- 2028-07-31
- Verified
- August 17, 2026
- Licensed since
- 1999
- Expires
- 2027-07-31
- Verified
- August 17, 2026
- Licensed since
- 2000
- Expires
- 2028-03-31
Compare the top 6 at a glance
| Company | License | Class | Licensed since |
|---|---|---|---|
| Kent Mortensen Plumbing Co | #035930 | R-37 · Residential | 1972 |
| Patrick Krimmer Plumbing | #082647 | R-37R · Residential | 1989 |
| Intermountain Plumbing Inc. | #091860 | R-37R · Residential | 1991 |
| Plummer's Plumbing | #108666 | R-37R · Residential | 1995 |
| Harper's Plumbing | #110681 | R-37R · Residential | 1995 |
| Tom Welch Custom Plumbing Inc. | #116930 | R-37R · Residential | 1996 |
Flagstaff plumbing licensure at a glance
44 active ROC plumbing licenses are registered in Flagstaff. Every Arizona license carries a scope, and it is a legal boundary rather than a size tier: 26 of Flagstaff's licenses are dual scope (residential and commercial work) and 18 residential-only, while commercial-only licenses never appear on these pages at all - they do not permit residential work in Arizona. Tenure is what these pages rank on, and Arizona's issue dates are real and filled on every record: the median Flagstaff license has been held 14 years, the longest-standing since 1972, and 9 (20.5%) have been held 25 or more years. The posting list carries no insurance, no bond and no phone for any licensee - Arizona requires a license bond by statute but does not publish it, so we never show one, never claim one, and never rank on one. ROC's contractor search cannot link straight to a record, so every listing above shows its number for you to paste into ROC's contractor search. How we verify.
Plumbers in Flagstaff: common questions
How many licensed plumbers are there in Flagstaff?
44 active ROC plumbing licenses are registered in Flagstaff. 44 Flagstaff-registered companies passed our license verification, and the 8 on this page are the top-ranked of those. Only licenses ROC posts as Active, carrying a residential or dual scope and unexpired at our data date, are listed.
What does the scope on an Arizona plumbing license mean?
Arizona's scope is a legal boundary, not a size tier: a commercial-only license does not permit residential work, so commercial-only contractors never appear on these pages at all. 26 of Flagstaff's 44 licenses are dual scope (residential and commercial) and 18 are residential-only.
How do I check a plumber's license in Arizona?
Every listing above shows its ROC license number. ROC's contractor search cannot link straight to a record, so open it and type the number in: it shows the class, scope, status and expiration. The median Flagstaff license has been held 14 years, and the longest-standing dates to 1972.